steve/v-belt-pulley

Grooved V-belt pulley, ISO 4183: classical Y, Z, A, B, C, D, E and narrow SPZ, SPA, SPB, SPC sections, one or more grooves, plain bore.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset28 sizes

Groove profile11 options

Classical V-belt sections Y to E, narrow V-belt sections SPZ to SPC.

Datum diameter20–2500 mm

At least ISO 4183 table 5's minimum for the section (A 75, B 125, SPZ 63, SPA 90, ...). The outside diameter is this plus 2 b.

Grooves1–12

Bore1–1000 mm

Must leave at least 1 mm of wall under the groove bottoms.

Material3 options

Defaults built

part.py 72 lines · Python · STEVE runtime · checked

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"""Grooved pulley for classical and narrow V-belts (ISO 4183): a solid pulley with one or more grooves and a plain bore, axis along Z,

the first face on the XY plane. The groove profile, its spacing and the groove angle follow the standard's tables for the section and the

datum diameter. Dimensions from ISO 4183:1995, listed in the README."""

import math

from steve import Model

section = "A" # Groove profile: Y, Z, A, B, C, D, E (classical) or SPZ, SPA, SPB, SPC (narrow)

datum_diameter = 94.5 # mm Datum diameter dd (the outside diameter is dd + 2 b)

grooves = 1 # Number of grooves

bore = 10.0 # mm Bore diameter

material = "cast-iron-en-gjl-200" # Material

# ISO 4183:1995 "Belt drives - Classical and narrow V-belts - Grooved pulleys (system based on datum width)", third edition 1995-07-01.

# Table 2 (with table 1's datum widths): wd, b min, h min, e, f min in mm. Narrow sections share their classical twin's wd, b, e and f and

# have a deeper h.

GROOVES = {

"Y": (5.3, 1.6, 4.7, 8, 6),

"Z": (8.5, 2, 7, 12, 7),

"SPZ": (8.5, 2, 9, 12, 7),

"A": (11, 2.75, 8.7, 15, 9),

"SPA": (11, 2.75, 11, 15, 9),

"B": (14, 3.5, 10.8, 19, 11.5),

"SPB": (14, 3.5, 14, 19, 11.5),

"C": (19, 4.8, 14.3, 25.5, 16),

"SPC": (19, 4.8, 19, 25.5, 16),

"D": (27, 8.1, 19.9, 37, 23),

"E": (32, 9.6, 23.4, 44.5, 28),

}

# Table 4: the groove angle in degrees by datum diameter: (largest dd for the smaller angle, smaller angle, larger angle). Y: 32° up to

# dd 60, 36° above; D and E: 36° up to 475 and 600, 38° above; the rest 34° up to the limit, 38° above.

ANGLES = {

"Y": (60, 32, 36), "Z": (80, 34, 38), "SPZ": (80, 34, 38), "A": (118, 34, 38), "SPA": (118, 34, 38), "B": (190, 34, 38),

"SPB": (190, 34, 38), "C": (315, 34, 38), "SPC": (315, 34, 38), "D": (475, 36, 38), "E": (600, 36, 38),

}

# Table 5: the smallest datum diameter, mm.

MIN_DATUM = {"Y": 20, "Z": 50, "A": 75, "B": 125, "C": 200, "D": 355, "E": 500, "SPZ": 63, "SPA": 90, "SPB": 140, "SPC": 224}

MATERIALS = {"cast-iron-en-gjl-200": "#6f7378", "steel-c45e": "#8d9196", "aluminum-6061-t6": "#c9ccd0"}

if section not in GROOVES:

raise ValueError(f"no groove profile {section!r}: {', '.join(GROOVES)}")

wd, b, h, e, f = GROOVES[section]

if datum_diameter < MIN_DATUM[section]:

raise ValueError(f"ISO 4183 table 5: a {section} pulley's datum diameter is at least {MIN_DATUM[section]} mm")

if grooves < 1 or grooves != int(grooves):

raise ValueError("grooves is a whole number, at least 1")

limit, small, large = ANGLES[section]

alpha = small if datum_diameter <= limit else large

outside = datum_diameter + 2 * b

root = datum_diameter - 2 * h

# The bore must leave at least 1 mm of wall under the groove bottoms (a proportion; the standard gives no hub or bore).

if bore <= 0 or bore > root - 2:

raise ValueError(f"bore: up to {root - 2:.1f} mm for a {section} groove at datum Ø {datum_diameter} (groove bottom Ø {root:.1f})")

if material not in MATERIALS:

raise ValueError(f"material: one of {', '.join(MATERIALS)}")

width = (grooves - 1) * e + 2 * f # face width: f from each face to the nearest groove's centre, e between grooves

t = math.tan(math.radians(alpha / 2))

top = wd + 2 * b * t # groove width at the outside diameter

bottom = wd - 2 * h * t # groove width at its bottom (drawn flat)

model = Model()

outline = [(bore / 2, 0), (outside / 2, 0)]

for i in range(grooves):

zc = f + i * e

outline += [(outside / 2, zc - top / 2), (root / 2, zc - bottom / 2), (root / 2, zc + bottom / 2), (outside / 2, zc + top / 2)]

outline += [(outside / 2, width), (bore / 2, width)]

with model.sketch("profile", on="XZ", name="Pulley section") as sk:

sk.polyline("section", outline, closed=True)

model.revolve("pulley", "profile", axis="Z", op="new", body="pulley_body", name="Pulley")

model.material(material, color=MATERIALS[material])

result = model.result()

"""Grooved pulley for classical and narrow V-belts (ISO 4183): a solid pulley with one or more grooves and a plain bore, axis along Z,
the first face on the XY plane. The groove profile, its spacing and the groove angle follow the standard's tables for the section and the
datum diameter. Dimensions from ISO 4183:1995, listed in the README."""
import math

from steve import Model

section = "A"  # Groove profile: Y, Z, A, B, C, D, E (classical) or SPZ, SPA, SPB, SPC (narrow)
datum_diameter = 94.5  # mm Datum diameter dd (the outside diameter is dd + 2 b)
grooves = 1  # Number of grooves
bore = 10.0  # mm Bore diameter
material = "cast-iron-en-gjl-200"  # Material

# ISO 4183:1995 "Belt drives - Classical and narrow V-belts - Grooved pulleys (system based on datum width)", third edition 1995-07-01.
# Table 2 (with table 1's datum widths): wd, b min, h min, e, f min in mm. Narrow sections share their classical twin's wd, b, e and f and
# have a deeper h.
GROOVES = {
    "Y": (5.3, 1.6, 4.7, 8, 6),
    "Z": (8.5, 2, 7, 12, 7),
    "SPZ": (8.5, 2, 9, 12, 7),
    "A": (11, 2.75, 8.7, 15, 9),
    "SPA": (11, 2.75, 11, 15, 9),
    "B": (14, 3.5, 10.8, 19, 11.5),
    "SPB": (14, 3.5, 14, 19, 11.5),
    "C": (19, 4.8, 14.3, 25.5, 16),
    "SPC": (19, 4.8, 19, 25.5, 16),
    "D": (27, 8.1, 19.9, 37, 23),
    "E": (32, 9.6, 23.4, 44.5, 28),
}
# Table 4: the groove angle in degrees by datum diameter: (largest dd for the smaller angle, smaller angle, larger angle). Y: 32° up to
# dd 60, 36° above; D and E: 36° up to 475 and 600, 38° above; the rest 34° up to the limit, 38° above.
ANGLES = {
    "Y": (60, 32, 36), "Z": (80, 34, 38), "SPZ": (80, 34, 38), "A": (118, 34, 38), "SPA": (118, 34, 38), "B": (190, 34, 38),
    "SPB": (190, 34, 38), "C": (315, 34, 38), "SPC": (315, 34, 38), "D": (475, 36, 38), "E": (600, 36, 38),
}
# Table 5: the smallest datum diameter, mm.
MIN_DATUM = {"Y": 20, "Z": 50, "A": 75, "B": 125, "C": 200, "D": 355, "E": 500, "SPZ": 63, "SPA": 90, "SPB": 140, "SPC": 224}
MATERIALS = {"cast-iron-en-gjl-200": "#6f7378", "steel-c45e": "#8d9196", "aluminum-6061-t6": "#c9ccd0"}

if section not in GROOVES:
    raise ValueError(f"no groove profile {section!r}: {', '.join(GROOVES)}")
wd, b, h, e, f = GROOVES[section]
if datum_diameter < MIN_DATUM[section]:
    raise ValueError(f"ISO 4183 table 5: a {section} pulley's datum diameter is at least {MIN_DATUM[section]} mm")
if grooves < 1 or grooves != int(grooves):
    raise ValueError("grooves is a whole number, at least 1")
limit, small, large = ANGLES[section]
alpha = small if datum_diameter <= limit else large
outside = datum_diameter + 2 * b
root = datum_diameter - 2 * h
# The bore must leave at least 1 mm of wall under the groove bottoms (a proportion; the standard gives no hub or bore).
if bore <= 0 or bore > root - 2:
    raise ValueError(f"bore: up to {root - 2:.1f} mm for a {section} groove at datum Ø {datum_diameter} (groove bottom Ø {root:.1f})")
if material not in MATERIALS:
    raise ValueError(f"material: one of {', '.join(MATERIALS)}")
width = (grooves - 1) * e + 2 * f   # face width: f from each face to the nearest groove's centre, e between grooves
t = math.tan(math.radians(alpha / 2))
top = wd + 2 * b * t      # groove width at the outside diameter
bottom = wd - 2 * h * t   # groove width at its bottom (drawn flat)

model = Model()
outline = [(bore / 2, 0), (outside / 2, 0)]
for i in range(grooves):
    zc = f + i * e
    outline += [(outside / 2, zc - top / 2), (root / 2, zc - bottom / 2), (root / 2, zc + bottom / 2), (outside / 2, zc + top / 2)]
outline += [(outside / 2, width), (bore / 2, width)]
with model.sketch("profile", on="XZ", name="Pulley section") as sk:
    sk.polyline("section", outline, closed=True)
model.revolve("pulley", "profile", axis="Z", op="new", body="pulley_body", name="Pulley")
model.material(material, color=MATERIALS[material])
result = model.result()

pypart.toml 242 lines · TOML

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name = "steve/v-belt-pulley"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Grooved V-belt pulley, ISO 4183: classical Y, Z, A, B, C, D, E and narrow SPZ, SPA, SPB, SPC sections, one or more grooves, plain bore."

description = """Solid grooved pulley for classical and narrow V-belts. The groove profile, groove spacing, edge distance and groove angle follow ISO 4183's tables for the section and datum diameter. The outside diameter is the datum diameter plus twice b. Plain bore, no hub, keyway or set screw. Axis along Z, first face on the XY plane. See the README."""

tags = ["pulley", "v-belt", "sheave", "iso-4183", "belt", "power-transmission"]

[parameters.section]

type = "choice"

default = "A"

choices = ["Y", "Z", "A", "B", "C", "D", "E", "SPZ", "SPA", "SPB", "SPC"]

label = "Groove profile"

description = "Classical V-belt sections Y to E, narrow V-belt sections SPZ to SPC."

[parameters.datum_diameter]

type = "number"

default = 94.5

min = 20

max = 2500

unit = "mm"

label = "Datum diameter"

description = "At least ISO 4183 table 5's minimum for the section (A 75, B 125, SPZ 63, SPA 90, ...). The outside diameter is this plus 2 b."

[parameters.grooves]

type = "integer"

default = 1

min = 1

max = 12

label = "Grooves"

[parameters.bore]

type = "number"

default = 10

min = 1

max = 1000

unit = "mm"

label = "Bore"

description = "Must leave at least 1 mm of wall under the groove bottoms."

[parameters.material]

type = "choice"

default = "cast-iron-en-gjl-200"

choices = ["cast-iron-en-gjl-200", "steel-c45e", "aluminum-6061-t6"]

label = "Material"

[[presets]]

id = "A-DD94.5-G1-B5"

title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 5"

params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 5 }

aliases = ["V-belt pulley A 100 bore 5", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=5 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD94.5-G1-B6"

title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 6"

params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 6 }

aliases = ["V-belt pulley A 100 bore 6", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=6 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD94.5-G1-B8"

title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 8"

params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 8 }

aliases = ["V-belt pulley A 100 bore 8", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=8 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD94.5-G1-B10"

title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 10"

params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 10 }

aliases = ["V-belt pulley A 100 bore 10", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=10 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD94.5-G1-B12"

title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 12"

params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 12 }

aliases = ["V-belt pulley A 100 bore 12", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=12 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD94.5-G1-B15"

title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 15"

params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 15 }

aliases = ["V-belt pulley A 100 bore 15", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=15 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD114.5-G1-B5"

title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 5"

params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 5 }

aliases = ["V-belt pulley A 120 bore 5", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=5 mm; grooves=1"]

standard = "ISO 4183"

[[presets]]

id = "A-DD114.5-G1-B6"

title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 6"

params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 6 }

100

aliases = ["V-belt pulley A 120 bore 6", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=6 mm; grooves=1"]

101

standard = "ISO 4183"

102

103

[[presets]]

104

id = "A-DD114.5-G1-B8"

105

title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 8"

106

params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 8 }

107

aliases = ["V-belt pulley A 120 bore 8", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=8 mm; grooves=1"]

108

standard = "ISO 4183"

109

110

[[presets]]

111

id = "A-DD114.5-G1-B10"

112

title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 10"

113

params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 10 }

114

aliases = ["V-belt pulley A 120 bore 10", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=10 mm; grooves=1"]

115

standard = "ISO 4183"

116

117

[[presets]]

118

id = "A-DD114.5-G1-B12"

119

title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 12"

120

params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 12 }

121

aliases = ["V-belt pulley A 120 bore 12", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=12 mm; grooves=1"]

122

standard = "ISO 4183"

123

124

[[presets]]

125

id = "A-DD114.5-G1-B15"

126

title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 15"

127

params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 15 }

128

aliases = ["V-belt pulley A 120 bore 15", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=15 mm; grooves=1"]

129

standard = "ISO 4183"

130

131

[[presets]]

132

id = "Y-DD20-G1-B4"

133

title = "V-belt pulley, Y section, 1 groove, datum Ø 20 (outside Ø 23.2), bore 4"

134

params = { section = "Y", datum_diameter = 20, grooves = 1, bore = 4 }

135

aliases = ["V-belt pulley Y 23.2 bore 4", "Y pulley datum 20", "ISO 4183 Y pulley", "Y section V pulley", "Y groove pulley 1 groove", "1 groove Y sheave"]

136

standard = "ISO 4183"

137

138

[[presets]]

139

id = "Z-DD50-G1-B10"

140

title = "V-belt pulley, Z section, 1 groove, datum Ø 50 (outside Ø 54), bore 10"

141

params = { section = "Z", datum_diameter = 50, grooves = 1, bore = 10 }

142

aliases = ["V-belt pulley Z 54 bore 10", "Z pulley datum 50", "ISO 4183 Z pulley", "Z section V pulley", "Z groove pulley 1 groove", "1 groove Z sheave"]

143

standard = "ISO 4183"

144

145

[[presets]]

146

id = "SPZ-DD63-G1-B13"

147

title = "V-belt pulley, SPZ section, 1 groove, datum Ø 63 (outside Ø 67), bore 13"

148

params = { section = "SPZ", datum_diameter = 63, grooves = 1, bore = 13 }

149

aliases = ["V-belt pulley SPZ 67 bore 13", "SPZ pulley datum 63", "ISO 4183 SPZ pulley", "SPZ section V pulley", "SPZ groove pulley 1 groove", "1 groove SPZ sheave"]

150

standard = "ISO 4183"

151

152

[[presets]]

153

id = "A-DD75-G1-B15"

154

title = "V-belt pulley, A section, 1 groove, datum Ø 75 (outside Ø 80.5), bore 15"

155

params = { section = "A", datum_diameter = 75, grooves = 1, bore = 15 }

156

aliases = ["V-belt pulley A 80.5 bore 15", "A pulley datum 75", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave"]

157

standard = "ISO 4183"

158

159

[[presets]]

160

id = "SPA-DD90-G1-B18"

161

title = "V-belt pulley, SPA section, 1 groove, datum Ø 90 (outside Ø 95.5), bore 18"

162

params = { section = "SPA", datum_diameter = 90, grooves = 1, bore = 18 }

163

aliases = ["V-belt pulley SPA 95.5 bore 18", "SPA pulley datum 90", "ISO 4183 SPA pulley", "SPA section V pulley", "SPA groove pulley 1 groove", "1 groove SPA sheave"]

164

standard = "ISO 4183"

165

166

[[presets]]

167

id = "B-DD125-G1-B25"

168

title = "V-belt pulley, B section, 1 groove, datum Ø 125 (outside Ø 132), bore 25"

169

params = { section = "B", datum_diameter = 125, grooves = 1, bore = 25 }

170

aliases = ["V-belt pulley B 132 bore 25", "B pulley datum 125", "ISO 4183 B pulley", "B section V pulley", "B groove pulley 1 groove", "1 groove B sheave"]

171

standard = "ISO 4183"

172

173

[[presets]]

174

id = "SPB-DD140-G1-B28"

175

title = "V-belt pulley, SPB section, 1 groove, datum Ø 140 (outside Ø 147), bore 28"

176

params = { section = "SPB", datum_diameter = 140, grooves = 1, bore = 28 }

177

aliases = ["V-belt pulley SPB 147 bore 28", "SPB pulley datum 140", "ISO 4183 SPB pulley", "SPB section V pulley", "SPB groove pulley 1 groove", "1 groove SPB sheave"]

178

standard = "ISO 4183"

179

180

[[presets]]

181

id = "C-DD200-G1-B40"

182

title = "V-belt pulley, C section, 1 groove, datum Ø 200 (outside Ø 209.6), bore 40"

183

params = { section = "C", datum_diameter = 200, grooves = 1, bore = 40 }

184

aliases = ["V-belt pulley C 209.6 bore 40", "C pulley datum 200", "ISO 4183 C pulley", "C section V pulley", "C groove pulley 1 groove", "1 groove C sheave"]

185

standard = "ISO 4183"

186

187

[[presets]]

188

id = "SPC-DD224-G1-B45"

189

title = "V-belt pulley, SPC section, 1 groove, datum Ø 224 (outside Ø 233.6), bore 45"

190

params = { section = "SPC", datum_diameter = 224, grooves = 1, bore = 45 }

191

aliases = ["V-belt pulley SPC 233.6 bore 45", "SPC pulley datum 224", "ISO 4183 SPC pulley", "SPC section V pulley", "SPC groove pulley 1 groove", "1 groove SPC sheave"]

192

standard = "ISO 4183"

193

194

[[presets]]

195

id = "D-DD355-G1-B71"

196

title = "V-belt pulley, D section, 1 groove, datum Ø 355 (outside Ø 371.2), bore 71"

197

params = { section = "D", datum_diameter = 355, grooves = 1, bore = 71 }

198

aliases = ["V-belt pulley D 371.2 bore 71", "D pulley datum 355", "ISO 4183 D pulley", "D section V pulley", "D groove pulley 1 groove", "1 groove D sheave"]

199

standard = "ISO 4183"

200

201

[[presets]]

202

id = "E-DD500-G1-B100"

203

title = "V-belt pulley, E section, 1 groove, datum Ø 500 (outside Ø 519.2), bore 100"

204

params = { section = "E", datum_diameter = 500, grooves = 1, bore = 100 }

205

aliases = ["V-belt pulley E 519.2 bore 100", "E pulley datum 500", "ISO 4183 E pulley", "E section V pulley", "E groove pulley 1 groove", "1 groove E sheave"]

206

standard = "ISO 4183"

207

208

[[presets]]

209

id = "SPZ-DD100-G2-B20"

210

title = "V-belt pulley, SPZ section, 2 grooves, datum Ø 100 (outside Ø 104), bore 20"

211

params = { section = "SPZ", datum_diameter = 100, grooves = 2, bore = 20 }

212

aliases = ["V-belt pulley SPZ 104 bore 20", "SPZ pulley datum 100", "ISO 4183 SPZ pulley", "SPZ section V pulley", "SPZ groove pulley 2 grooves", "2 grooves SPZ sheave"]

213

standard = "ISO 4183"

214

215

[[presets]]

216

id = "SPA-DD125-G3-B25"

217

title = "V-belt pulley, SPA section, 3 grooves, datum Ø 125 (outside Ø 130.5), bore 25"

218

params = { section = "SPA", datum_diameter = 125, grooves = 3, bore = 25 }

219

aliases = ["V-belt pulley SPA 130.5 bore 25", "SPA pulley datum 125", "ISO 4183 SPA pulley", "SPA section V pulley", "SPA groove pulley 3 grooves", "3 grooves SPA sheave"]

220

standard = "ISO 4183"

221

222

[[presets]]

223

id = "A-DD125-G2-B25"

224

title = "V-belt pulley, A section, 2 grooves, datum Ø 125 (outside Ø 130.5), bore 25"

225

params = { section = "A", datum_diameter = 125, grooves = 2, bore = 25 }

226

aliases = ["V-belt pulley A 130.5 bore 25", "A pulley datum 125", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 2 grooves", "2 grooves A sheave"]

227

standard = "ISO 4183"

228

229

[[presets]]

230

id = "B-DD200-G2-B30"

231

title = "V-belt pulley, B section, 2 grooves, datum Ø 200 (outside Ø 207), bore 30"

232

params = { section = "B", datum_diameter = 200, grooves = 2, bore = 30 }

233

aliases = ["V-belt pulley B 207 bore 30", "B pulley datum 200", "ISO 4183 B pulley", "B section V pulley", "B groove pulley 2 grooves", "2 grooves B sheave"]

234

standard = "ISO 4183"

235

236

[[presets]]

237

id = "SPB-DD224-G4-B40"

238

title = "V-belt pulley, SPB section, 4 grooves, datum Ø 224 (outside Ø 231), bore 40"

239

params = { section = "SPB", datum_diameter = 224, grooves = 4, bore = 40 }

240

aliases = ["V-belt pulley SPB 231 bore 40", "SPB pulley datum 224", "ISO 4183 SPB pulley", "SPB section V pulley", "SPB groove pulley 4 grooves", "4 grooves SPB sheave"]

241

standard = "ISO 4183"

242

name = "steve/v-belt-pulley"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Grooved V-belt pulley, ISO 4183: classical Y, Z, A, B, C, D, E and narrow SPZ, SPA, SPB, SPC sections, one or more grooves, plain bore."
description = """Solid grooved pulley for classical and narrow V-belts. The groove profile, groove spacing, edge distance and groove angle follow ISO 4183's tables for the section and datum diameter. The outside diameter is the datum diameter plus twice b. Plain bore, no hub, keyway or set screw. Axis along Z, first face on the XY plane. See the README."""
tags = ["pulley", "v-belt", "sheave", "iso-4183", "belt", "power-transmission"]

[parameters.section]
type = "choice"
default = "A"
choices = ["Y", "Z", "A", "B", "C", "D", "E", "SPZ", "SPA", "SPB", "SPC"]
label = "Groove profile"
description = "Classical V-belt sections Y to E, narrow V-belt sections SPZ to SPC."

[parameters.datum_diameter]
type = "number"
default = 94.5
min = 20
max = 2500
unit = "mm"
label = "Datum diameter"
description = "At least ISO 4183 table 5's minimum for the section (A 75, B 125, SPZ 63, SPA 90, ...). The outside diameter is this plus 2 b."

[parameters.grooves]
type = "integer"
default = 1
min = 1
max = 12
label = "Grooves"

[parameters.bore]
type = "number"
default = 10
min = 1
max = 1000
unit = "mm"
label = "Bore"
description = "Must leave at least 1 mm of wall under the groove bottoms."

[parameters.material]
type = "choice"
default = "cast-iron-en-gjl-200"
choices = ["cast-iron-en-gjl-200", "steel-c45e", "aluminum-6061-t6"]
label = "Material"

[[presets]]
id = "A-DD94.5-G1-B5"
title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 5"
params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 5 }
aliases = ["V-belt pulley A 100 bore 5", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=5 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD94.5-G1-B6"
title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 6"
params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 6 }
aliases = ["V-belt pulley A 100 bore 6", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=6 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD94.5-G1-B8"
title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 8"
params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 8 }
aliases = ["V-belt pulley A 100 bore 8", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=8 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD94.5-G1-B10"
title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 10"
params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 10 }
aliases = ["V-belt pulley A 100 bore 10", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=10 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD94.5-G1-B12"
title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 12"
params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 12 }
aliases = ["V-belt pulley A 100 bore 12", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=12 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD94.5-G1-B15"
title = "V-belt pulley, A section, 1 groove, datum Ø 94.5 (outside Ø 100), bore 15"
params = { section = "A", datum_diameter = 94.5, grooves = 1, bore = 15 }
aliases = ["V-belt pulley A 100 bore 15", "A pulley datum 94.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=100 mm; bore=15 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD114.5-G1-B5"
title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 5"
params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 5 }
aliases = ["V-belt pulley A 120 bore 5", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=5 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD114.5-G1-B6"
title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 6"
params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 6 }
aliases = ["V-belt pulley A 120 bore 6", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=6 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD114.5-G1-B8"
title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 8"
params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 8 }
aliases = ["V-belt pulley A 120 bore 8", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=8 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD114.5-G1-B10"
title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 10"
params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 10 }
aliases = ["V-belt pulley A 120 bore 10", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=10 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD114.5-G1-B12"
title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 12"
params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 12 }
aliases = ["V-belt pulley A 120 bore 12", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=12 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "A-DD114.5-G1-B15"
title = "V-belt pulley, A section, 1 groove, datum Ø 114.5 (outside Ø 120), bore 15"
params = { section = "A", datum_diameter = 114.5, grooves = 1, bore = 15 }
aliases = ["V-belt pulley A 120 bore 15", "A pulley datum 114.5", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave", "pulley type=v_belt_A; outside diameter=120 mm; bore=15 mm; grooves=1"]
standard = "ISO 4183"

[[presets]]
id = "Y-DD20-G1-B4"
title = "V-belt pulley, Y section, 1 groove, datum Ø 20 (outside Ø 23.2), bore 4"
params = { section = "Y", datum_diameter = 20, grooves = 1, bore = 4 }
aliases = ["V-belt pulley Y 23.2 bore 4", "Y pulley datum 20", "ISO 4183 Y pulley", "Y section V pulley", "Y groove pulley 1 groove", "1 groove Y sheave"]
standard = "ISO 4183"

[[presets]]
id = "Z-DD50-G1-B10"
title = "V-belt pulley, Z section, 1 groove, datum Ø 50 (outside Ø 54), bore 10"
params = { section = "Z", datum_diameter = 50, grooves = 1, bore = 10 }
aliases = ["V-belt pulley Z 54 bore 10", "Z pulley datum 50", "ISO 4183 Z pulley", "Z section V pulley", "Z groove pulley 1 groove", "1 groove Z sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPZ-DD63-G1-B13"
title = "V-belt pulley, SPZ section, 1 groove, datum Ø 63 (outside Ø 67), bore 13"
params = { section = "SPZ", datum_diameter = 63, grooves = 1, bore = 13 }
aliases = ["V-belt pulley SPZ 67 bore 13", "SPZ pulley datum 63", "ISO 4183 SPZ pulley", "SPZ section V pulley", "SPZ groove pulley 1 groove", "1 groove SPZ sheave"]
standard = "ISO 4183"

[[presets]]
id = "A-DD75-G1-B15"
title = "V-belt pulley, A section, 1 groove, datum Ø 75 (outside Ø 80.5), bore 15"
params = { section = "A", datum_diameter = 75, grooves = 1, bore = 15 }
aliases = ["V-belt pulley A 80.5 bore 15", "A pulley datum 75", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 1 groove", "1 groove A sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPA-DD90-G1-B18"
title = "V-belt pulley, SPA section, 1 groove, datum Ø 90 (outside Ø 95.5), bore 18"
params = { section = "SPA", datum_diameter = 90, grooves = 1, bore = 18 }
aliases = ["V-belt pulley SPA 95.5 bore 18", "SPA pulley datum 90", "ISO 4183 SPA pulley", "SPA section V pulley", "SPA groove pulley 1 groove", "1 groove SPA sheave"]
standard = "ISO 4183"

[[presets]]
id = "B-DD125-G1-B25"
title = "V-belt pulley, B section, 1 groove, datum Ø 125 (outside Ø 132), bore 25"
params = { section = "B", datum_diameter = 125, grooves = 1, bore = 25 }
aliases = ["V-belt pulley B 132 bore 25", "B pulley datum 125", "ISO 4183 B pulley", "B section V pulley", "B groove pulley 1 groove", "1 groove B sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPB-DD140-G1-B28"
title = "V-belt pulley, SPB section, 1 groove, datum Ø 140 (outside Ø 147), bore 28"
params = { section = "SPB", datum_diameter = 140, grooves = 1, bore = 28 }
aliases = ["V-belt pulley SPB 147 bore 28", "SPB pulley datum 140", "ISO 4183 SPB pulley", "SPB section V pulley", "SPB groove pulley 1 groove", "1 groove SPB sheave"]
standard = "ISO 4183"

[[presets]]
id = "C-DD200-G1-B40"
title = "V-belt pulley, C section, 1 groove, datum Ø 200 (outside Ø 209.6), bore 40"
params = { section = "C", datum_diameter = 200, grooves = 1, bore = 40 }
aliases = ["V-belt pulley C 209.6 bore 40", "C pulley datum 200", "ISO 4183 C pulley", "C section V pulley", "C groove pulley 1 groove", "1 groove C sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPC-DD224-G1-B45"
title = "V-belt pulley, SPC section, 1 groove, datum Ø 224 (outside Ø 233.6), bore 45"
params = { section = "SPC", datum_diameter = 224, grooves = 1, bore = 45 }
aliases = ["V-belt pulley SPC 233.6 bore 45", "SPC pulley datum 224", "ISO 4183 SPC pulley", "SPC section V pulley", "SPC groove pulley 1 groove", "1 groove SPC sheave"]
standard = "ISO 4183"

[[presets]]
id = "D-DD355-G1-B71"
title = "V-belt pulley, D section, 1 groove, datum Ø 355 (outside Ø 371.2), bore 71"
params = { section = "D", datum_diameter = 355, grooves = 1, bore = 71 }
aliases = ["V-belt pulley D 371.2 bore 71", "D pulley datum 355", "ISO 4183 D pulley", "D section V pulley", "D groove pulley 1 groove", "1 groove D sheave"]
standard = "ISO 4183"

[[presets]]
id = "E-DD500-G1-B100"
title = "V-belt pulley, E section, 1 groove, datum Ø 500 (outside Ø 519.2), bore 100"
params = { section = "E", datum_diameter = 500, grooves = 1, bore = 100 }
aliases = ["V-belt pulley E 519.2 bore 100", "E pulley datum 500", "ISO 4183 E pulley", "E section V pulley", "E groove pulley 1 groove", "1 groove E sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPZ-DD100-G2-B20"
title = "V-belt pulley, SPZ section, 2 grooves, datum Ø 100 (outside Ø 104), bore 20"
params = { section = "SPZ", datum_diameter = 100, grooves = 2, bore = 20 }
aliases = ["V-belt pulley SPZ 104 bore 20", "SPZ pulley datum 100", "ISO 4183 SPZ pulley", "SPZ section V pulley", "SPZ groove pulley 2 grooves", "2 grooves SPZ sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPA-DD125-G3-B25"
title = "V-belt pulley, SPA section, 3 grooves, datum Ø 125 (outside Ø 130.5), bore 25"
params = { section = "SPA", datum_diameter = 125, grooves = 3, bore = 25 }
aliases = ["V-belt pulley SPA 130.5 bore 25", "SPA pulley datum 125", "ISO 4183 SPA pulley", "SPA section V pulley", "SPA groove pulley 3 grooves", "3 grooves SPA sheave"]
standard = "ISO 4183"

[[presets]]
id = "A-DD125-G2-B25"
title = "V-belt pulley, A section, 2 grooves, datum Ø 125 (outside Ø 130.5), bore 25"
params = { section = "A", datum_diameter = 125, grooves = 2, bore = 25 }
aliases = ["V-belt pulley A 130.5 bore 25", "A pulley datum 125", "ISO 4183 A pulley", "A section V pulley", "A groove pulley 2 grooves", "2 grooves A sheave"]
standard = "ISO 4183"

[[presets]]
id = "B-DD200-G2-B30"
title = "V-belt pulley, B section, 2 grooves, datum Ø 200 (outside Ø 207), bore 30"
params = { section = "B", datum_diameter = 200, grooves = 2, bore = 30 }
aliases = ["V-belt pulley B 207 bore 30", "B pulley datum 200", "ISO 4183 B pulley", "B section V pulley", "B groove pulley 2 grooves", "2 grooves B sheave"]
standard = "ISO 4183"

[[presets]]
id = "SPB-DD224-G4-B40"
title = "V-belt pulley, SPB section, 4 grooves, datum Ø 224 (outside Ø 231), bore 40"
params = { section = "SPB", datum_diameter = 224, grooves = 4, bore = 40 }
aliases = ["V-belt pulley SPB 231 bore 40", "SPB pulley datum 224", "ISO 4183 SPB pulley", "SPB section V pulley", "SPB groove pulley 4 grooves", "4 grooves SPB sheave"]
standard = "ISO 4183"

README.md 54 lines · Markdown

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V-belt pulley

A solid grooved pulley for classical and narrow V-belts, with a plain bore. The axis is along Z and the first face lies on the XY plane.

The section, datum diameter and number of grooves give the whole pulley:

the outside diameter is the datum diameter plus 2 b, and the groove bottom diameter is the datum diameter minus 2 h;
the groove is the datum width wd wide at the datum diameter, with sides at the groove angle α;
the grooves are e apart, and the outer grooves' centres are f from the faces, so the face width is (grooves - 1) e + 2 f.

Section	wd	b min	h min	e	f min	Groove angle α by datum Ø dd	dd min
Y	5.3	1.6	4.7	8	6	32° up to 60, 36° above	20
Z	8.5	2	7	12	7	34° up to 80, 38° above	50
SPZ	8.5	2	9	12	7	34° up to 80, 38° above	63
A	11	2.75	8.7	15	9	34° up to 118, 38° above	75
SPA	11	2.75	11	15	9	34° up to 118, 38° above	90
B	14	3.5	10.8	19	11.5	34° up to 190, 38° above	125
SPB	14	3.5	14	19	11.5	34° up to 190, 38° above	140
C	19	4.8	14.3	25.5	16	34° up to 315, 38° above	200
SPC	19	4.8	19	25.5	16	34° up to 315, 38° above	224
D	27	8.1	19.9	37	23	36° up to 475, 38° above	355
E	32	9.6	23.4	44.5	28	36° up to 600, 38° above	500

The part uses the minimum b, h and f, and the nominal e. A datum diameter under the section's minimum is refused.

Source

ISO 4183:1995, "Belt drives - Classical and narrow V-belts - Grooved pulleys (system based on datum width)", third edition, 1995-07-01. This is the iTeh Standards public preview of the standard, which carries the whole text: https://cdn.standards.iteh.ai/samples/25817/ae47c2ed867549cbadc47a63b459cf35/ISO-4183-1995.pdf. ISO 4183:2026 has since replaced this edition.

Table 1: datum widths wd.
Table 2 and figure 1: b min, h min, e, f min.
Table 4: the groove angle α by datum diameter.
Table 5: the minimum datum diameter.
Table 3 lists the preferred datum diameters (R 40). The extra presets use some of them.

Not from the standard:

The standard gives the groove and rim, not the body. This part is a solid pulley with a plain bore, and has no hub, web, keyway or set screw.
The groove bottom is drawn flat.
The bore must leave at least 1 mm of wall under the groove bottoms. That's a limit this part sets, not the standard's.
The extra presets' bores are 0.2 x the datum diameter, for show.
The materials and colours are a choice: grey cast iron EN-GJL-200 (the default), C45E steel or 6061-T6 aluminium.

Catalogue models

The old catalogue's v belt A pulley and v belt B pulley names give an outside diameter and a bore, with one groove. Its model for every one of them was a plain disc, 10 thick, with no groove. This part builds the real pulley for a name where the standard allows one: the datum diameter is the outside diameter minus 2 b, and it must reach table 5's minimum.

A section, outside Ø 100 and 120: datum Ø 94.5 and 114.5, 34°, face width 18, bores 5 to 15. These map.
A section, outside Ø 20 to 80: left out. The datum diameter would be under 75; outside Ø 80 gives 74.5.
B section, every outside Ø (20 to 120): left out. The datum diameter would be under 125, which needs an outside Ø of at least 132.

The old catalogue's flat-belt and round-belt pulleys aren't here. Their model was the same plain disc. Their names give only the outside diameter and bore, not a flat pulley's face width and crown or a round belt's size and groove, so they don't describe one real pulley.

# V-belt pulley

A solid grooved pulley for classical and narrow V-belts, with a plain bore. The axis is along Z and the first face lies on the XY plane.

The section, datum diameter and number of grooves give the whole pulley:

- the outside diameter is the datum diameter plus 2 b, and the groove bottom diameter is the datum diameter minus 2 h;

- the groove is the datum width wd wide at the datum diameter, with sides at the groove angle α;

- the grooves are e apart, and the outer grooves' centres are f from the faces, so the face width is (grooves - 1) e + 2 f.

|---|---|---|---|---|---|---|---|

| Y | 5.3 | 1.6 | 4.7 | 8 | 6 | 32° up to 60, 36° above | 20 |

| Z | 8.5 | 2 | 7 | 12 | 7 | 34° up to 80, 38° above | 50 |

| SPZ | 8.5 | 2 | 9 | 12 | 7 | 34° up to 80, 38° above | 63 |

| A | 11 | 2.75 | 8.7 | 15 | 9 | 34° up to 118, 38° above | 75 |

| SPA | 11 | 2.75 | 11 | 15 | 9 | 34° up to 118, 38° above | 90 |

| B | 14 | 3.5 | 10.8 | 19 | 11.5 | 34° up to 190, 38° above | 125 |

| SPB | 14 | 3.5 | 14 | 19 | 11.5 | 34° up to 190, 38° above | 140 |

| C | 19 | 4.8 | 14.3 | 25.5 | 16 | 34° up to 315, 38° above | 200 |

| SPC | 19 | 4.8 | 19 | 25.5 | 16 | 34° up to 315, 38° above | 224 |

| D | 27 | 8.1 | 19.9 | 37 | 23 | 36° up to 475, 38° above | 355 |

| E | 32 | 9.6 | 23.4 | 44.5 | 28 | 36° up to 600, 38° above | 500 |

The part uses the minimum b, h and f, and the nominal e. A datum diameter under the section's minimum is refused.

## Source

ISO 4183:1995, "Belt drives - Classical and narrow V-belts - Grooved pulleys (system based on datum width)", third edition, 1995-07-01. This is the iTeh Standards public preview of the standard, which carries the whole text: <https://cdn.standards.iteh.ai/samples/25817/ae47c2ed867549cbadc47a63b459cf35/ISO-4183-1995.pdf>. ISO 4183:2026 has since replaced this edition.

- Table 1: datum widths wd.

- Table 2 and figure 1: b min, h min, e, f min.

- Table 4: the groove angle α by datum diameter.

- Table 5: the minimum datum diameter.

- Table 3 lists the preferred datum diameters (R 40). The extra presets use some of them.

**Not from the standard:**

- The standard gives the groove and rim, not the body. This part is a solid pulley with a plain bore, and has no hub, web, keyway or set screw.

- The groove bottom is drawn flat.

- The bore must leave at least 1 mm of wall under the groove bottoms. That's a limit this part sets, not the standard's.

- The extra presets' bores are 0.2 x the datum diameter, for show.

- The materials and colours are a choice: grey cast iron EN-GJL-200 (the default), C45E steel or 6061-T6 aluminium.

## Catalogue models

The old catalogue's `v belt A pulley` and `v belt B pulley` names give an outside diameter and a bore, with one groove. Its model for every one of them was a plain disc, 10 thick, with no groove. This part builds the real pulley for a name where the standard allows one: the datum diameter is the outside diameter minus 2 b, and it must reach table 5's minimum.

- **A section, outside Ø 100 and 120:** datum Ø 94.5 and 114.5, 34°, face width 18, bores 5 to 15. These map.

- **A section, outside Ø 20 to 80:** left out. The datum diameter would be under 75; outside Ø 80 gives 74.5.

- **B section, every outside Ø (20 to 120):** left out. The datum diameter would be under 125, which needs an outside Ø of at least 132.

# V-belt pulley

A solid grooved pulley for classical and narrow V-belts, with a plain bore. The axis is along Z and the first face lies on the XY plane.

The section, datum diameter and number of grooves give the whole pulley:

- the outside diameter is the datum diameter plus 2 b, and the groove bottom diameter is the datum diameter minus 2 h;
- the groove is the datum width wd wide at the datum diameter, with sides at the groove angle α;
- the grooves are e apart, and the outer grooves' centres are f from the faces, so the face width is (grooves - 1) e + 2 f.

| Section | wd | b min | h min | e | f min | Groove angle α by datum Ø dd | dd min |
|---|---|---|---|---|---|---|---|
| Y | 5.3 | 1.6 | 4.7 | 8 | 6 | 32° up to 60, 36° above | 20 |
| Z | 8.5 | 2 | 7 | 12 | 7 | 34° up to 80, 38° above | 50 |
| SPZ | 8.5 | 2 | 9 | 12 | 7 | 34° up to 80, 38° above | 63 |
| A | 11 | 2.75 | 8.7 | 15 | 9 | 34° up to 118, 38° above | 75 |
| SPA | 11 | 2.75 | 11 | 15 | 9 | 34° up to 118, 38° above | 90 |
| B | 14 | 3.5 | 10.8 | 19 | 11.5 | 34° up to 190, 38° above | 125 |
| SPB | 14 | 3.5 | 14 | 19 | 11.5 | 34° up to 190, 38° above | 140 |
| C | 19 | 4.8 | 14.3 | 25.5 | 16 | 34° up to 315, 38° above | 200 |
| SPC | 19 | 4.8 | 19 | 25.5 | 16 | 34° up to 315, 38° above | 224 |
| D | 27 | 8.1 | 19.9 | 37 | 23 | 36° up to 475, 38° above | 355 |
| E | 32 | 9.6 | 23.4 | 44.5 | 28 | 36° up to 600, 38° above | 500 |

The part uses the minimum b, h and f, and the nominal e. A datum diameter under the section's minimum is refused.

## Source

ISO 4183:1995, "Belt drives - Classical and narrow V-belts - Grooved pulleys (system based on datum width)", third edition, 1995-07-01. This is the iTeh Standards public preview of the standard, which carries the whole text: <https://cdn.standards.iteh.ai/samples/25817/ae47c2ed867549cbadc47a63b459cf35/ISO-4183-1995.pdf>. ISO 4183:2026 has since replaced this edition.

- Table 1: datum widths wd.
- Table 2 and figure 1: b min, h min, e, f min.
- Table 4: the groove angle α by datum diameter.
- Table 5: the minimum datum diameter.
- Table 3 lists the preferred datum diameters (R 40). The extra presets use some of them.

**Not from the standard:**

- The standard gives the groove and rim, not the body. This part is a solid pulley with a plain bore, and has no hub, web, keyway or set screw.
- The groove bottom is drawn flat.
- The bore must leave at least 1 mm of wall under the groove bottoms. That's a limit this part sets, not the standard's.
- The extra presets' bores are 0.2 x the datum diameter, for show.
- The materials and colours are a choice: grey cast iron EN-GJL-200 (the default), C45E steel or 6061-T6 aluminium.

## Catalogue models

The old catalogue's `v belt A pulley` and `v belt B pulley` names give an outside diameter and a bore, with one groove. Its model for every one of them was a plain disc, 10 thick, with no groove. This part builds the real pulley for a name where the standard allows one: the datum diameter is the outside diameter minus 2 b, and it must reach table 5's minimum.

- **A section, outside Ø 100 and 120:** datum Ø 94.5 and 114.5, 34°, face width 18, bores 5 to 15. These map.
- **A section, outside Ø 20 to 80:** left out. The datum diameter would be under 75; outside Ø 80 gives 74.5.
- **B section, every outside Ø (20 to 120):** left out. The datum diameter would be under 125, which needs an outside Ø of at least 132.

The old catalogue's flat-belt and round-belt pulleys aren't here. Their model was the same plain disc. Their names give only the outside diameter and bore, not a flat pulley's face width and crown or a round belt's size and groove, so they don't describe one real pulley.

Use this part

STEVE

Open in STEVE

Open it in STEVE The STEVE runtime runs in STEVE: open the part there, or download the code and bundle.

Get the code

curl -o part.py "https://pythonparts.org/p/steve/v-belt-pulley/v/1.0.0/raw/part.py"

Raw files, bundle and API

part.py
pypart.toml
README.md
bundle.tar.gzthe package, as published

curl "https://pythonparts.org/api/v1/parts/steve/v-belt-pulley/1.0.0"

The version's JSON (parameters, presets, files); add /build?name=value for a build at other values.

About this part

steve115 parts

Profile

EN-GJL-200 grey ironCast irons · Custom finish · 7.2 g/cm³

Mass: 794 g

At the parameters shown in the viewer.

License: MIT

Permissive: use, change and sell it; keep the copyright notice.

Runtime: STEVE
Requirements: None stated in the code
Built with: CadQuery 2.9.0.dev0
Published: Nov 6, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: 69b5e6e5ecc4…

#pulley #v-belt #sheave #iso-4183 #belt #power-transmission

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Solid grooved pulley for classical and narrow V-belts. The groove profile, groove spacing, edge distance and groove angle follow ISO 4183's tables for the section and datum diameter. The outside diameter is the datum diameter plus twice b. Plain bore, no hub, keyway or set screw. Axis along Z, first face on the XY plane. See the README.

V-belt pulley

A solid grooved pulley for classical and narrow V-belts, with a plain bore. The axis is along Z and the first face lies on the XY plane.

The section, datum diameter and number of grooves give the whole pulley:

the outside diameter is the datum diameter plus 2 b, and the groove bottom diameter is the datum diameter minus 2 h;
the groove is the datum width wd wide at the datum diameter, with sides at the groove angle α;
the grooves are e apart, and the outer grooves' centres are f from the faces, so the face width is (grooves - 1) e + 2 f.

Section	wd	b min	h min	e	f min	Groove angle α by datum Ø dd	dd min
Y	5.3	1.6	4.7	8	6	32° up to 60, 36° above	20
Z	8.5	2	7	12	7	34° up to 80, 38° above	50
SPZ	8.5	2	9	12	7	34° up to 80, 38° above	63
A	11	2.75	8.7	15	9	34° up to 118, 38° above	75
SPA	11	2.75	11	15	9	34° up to 118, 38° above	90
B	14	3.5	10.8	19	11.5	34° up to 190, 38° above	125
SPB	14	3.5	14	19	11.5	34° up to 190, 38° above	140
C	19	4.8	14.3	25.5	16	34° up to 315, 38° above	200
SPC	19	4.8	19	25.5	16	34° up to 315, 38° above	224
D	27	8.1	19.9	37	23	36° up to 475, 38° above	355
E	32	9.6	23.4	44.5	28	36° up to 600, 38° above	500

The part uses the minimum b, h and f, and the nominal e. A datum diameter under the section's minimum is refused.

Source

Table 1: datum widths wd.
Table 2 and figure 1: b min, h min, e, f min.
Table 4: the groove angle α by datum diameter.
Table 5: the minimum datum diameter.
Table 3 lists the preferred datum diameters (R 40). The extra presets use some of them.

Not from the standard:

The standard gives the groove and rim, not the body. This part is a solid pulley with a plain bore, and has no hub, web, keyway or set screw.
The groove bottom is drawn flat.
The bore must leave at least 1 mm of wall under the groove bottoms. That's a limit this part sets, not the standard's.
The extra presets' bores are 0.2 x the datum diameter, for show.
The materials and colours are a choice: grey cast iron EN-GJL-200 (the default), C45E steel or 6061-T6 aluminium.

Catalogue models

A section, outside Ø 100 and 120: datum Ø 94.5 and 114.5, 34°, face width 18, bores 5 to 15. These map.
A section, outside Ø 20 to 80: left out. The datum diameter would be under 75; outside Ø 80 gives 74.5.
B section, every outside Ø (20 to 120): left out. The datum diameter would be under 125, which needs an outside Ø of at least 132.