steve/shaft-support

Shaft support: SK8 to SK40 upright and SHF10 to SHF40 flanged, for round linear shafts.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset18 sizes

Type17 options

Detail

fullsimple

full: with the clamp's slit and screw hole. simple: bore and mounting holes only.

Defaults built

part.py 74 lines · Python · STEVE runtime · checked

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"""Shaft support, SK (upright, foot on the XY plane, shaft along Y) and SHF (flange on the XY plane, shaft along Z), with the shaft

centred on the origin's axis. Fit dimensions come from the table in the README. The clamp's slit and clamp hole sizes are proportions, for

looks. detail = "simple" leaves out the slit and clamp hole."""

import cadquery as cq

from steve import Model

designation = "SK8" # Shaft support

detail = "full" # full: with the clamp's slit and hole; simple: bore and mounting holes only

# type: (bore D, centre height h, half width E, width W, thickness L, height F, foot G, top width P, hole pitch B, hole S, clamp screw).

# Motion-and-Drives, SK steel shaft supports technical specifications, revision 12.03.2021,

# https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SK_supports_technical_specification.pdf

SK = {

"SK8": (8, 20, 21, 42, 14, 32.8, 6, 18, 32, 5.5, 4), "SK10": (10, 20, 21, 42, 14, 32.8, 6, 18, 32, 5.5, 4),

"SK12": (12, 23, 21, 42, 14, 37.5, 6, 20, 32, 5.5, 4), "SK16": (16, 27, 24, 48, 16, 44, 8, 25, 38, 5.5, 4),

"SK20": (20, 31, 30, 60, 20, 51, 10, 30, 45, 6.6, 5), "SK25": (25, 35, 35, 70, 24, 60, 12, 38, 56, 6.6, 6),

"SK30": (30, 42, 42, 84, 28, 70, 12, 44, 64, 9, 6), "SK35": (35, 50, 49, 98, 32, 82, 15, 50, 74, 11, 8),

"SK40": (40, 60, 57, 114, 36, 96, 15, 60, 90, 11, 8),

}

# type: (bore D, width W, length L, flange T, height F, boss G, hole pitch B, hole S, clamp screw).

# Motion-and-Drives, SHF steel shaft supports technical specifications, revision 12.03.2021,

# https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SHF_supports_technical_specification.pdf

SHF = {

"SHF10": (10, 43, 10, 5, 24, 20, 32, 5.5, 4), "SHF12": (12, 47, 13, 7, 28, 25, 36, 5.5, 4), "SHF16": (16, 50, 16, 8, 31, 28, 40, 5.5, 4),

"SHF20": (20, 60, 20, 8, 37, 34, 48, 7, 5), "SHF25": (25, 70, 25, 10, 42, 40, 56, 7, 5), "SHF30": (30, 80, 30, 12, 50, 46, 64, 9, 6),

"SHF35": (35, 92, 35, 14, 58, 50, 72, 12, 8), "SHF40": (40, 102, 40, 16, 67, 56, 80, 12, 10),

}

model = Model()

if designation in SK:

D, h, E, W, L, F, G, P, B, S, screw = SK[designation]

root = 0.1 * P # a small sloped root under the column, for looks

with model.sketch("body_sketch", on="XZ", name="Body") as sk:

sk.polyline("body", [(-W / 2, 0), (W / 2, 0), (W / 2, G), (P / 2 + root, G), (P / 2, G + root), (P / 2, F), (-P / 2, F), (-P / 2, G + root), (-P / 2 - root, G), (-W / 2, G)], closed=True)

model.extrude("body", "body_sketch", distance=L, both=True, name="Body")

with model.sketch("bore_sketch", on="XZ", name="Bore") as sk:

sk.circle("bore_circle", (0, h), D / 2)

model.extrude("bore", "bore_sketch", distance=L + 1, both=True, op="cut", name="Bore")

with model.sketch("holes_sketch", on="XY", name="Mounting holes") as sk:

sk.circle("hole_left", (-B / 2, 0), S / 2)

sk.circle("hole_right", (B / 2, 0), S / 2)

model.extrude("holes", "holes_sketch", distance=G, op="cut", name="Mounting holes")

if detail == "full":

slit = 0.05 * P

with model.sketch("slit_sketch", on="XZ", name="Clamp slit") as sk:

sk.rect("slit_rect", (-slit / 2, h), (slit / 2, F + 1))

model.extrude("slit", "slit_sketch", distance=L + 1, both=True, op="cut", name="Clamp slit")

clamp_z = (h + D / 2 + F) / 2

with model.sketch("clamp_sketch", on="YZ", name="Clamp hole") as sk:

sk.circle("clamp_circle", (0, clamp_z), screw / 2)

model.extrude("clamp_hole", "clamp_sketch", distance=P + 1, both=True, op="cut", name="Clamp hole")

model.note("centre_height", f"Centre height h = {h} +/-0.02, half width E = {E} +/-0.05 (maker's table)")

else:

D, W, L, T, F, G, B, S, screw = SHF[designation]

r = (W - B) / 2

R = G / 2

# the flange: the boss's circle and the two ears, joined by straight sides

flange = (cq.Workplane("XY").moveTo(-B / 2, -r).lineTo(0, -R).lineTo(B / 2, -r).threePointArc((W / 2, 0), (B / 2, r))

.lineTo(0, R).lineTo(-B / 2, r).threePointArc((-W / 2, 0), (-B / 2, -r)).close().extrude(T))

body = flange.union(cq.Workplane("XY").circle(R).extrude(L), clean=False)

top = F - R

ear = 0.2 * G

body = body.union(cq.Workplane("XY").workplane(offset=T).center(0, (R * 0.7 + top) / 2).rect(2 * ear, top - R * 0.7).extrude(L - T), clean=False)

body = body.cut(cq.Workplane("XY").workplane(offset=-1).circle(D / 2).extrude(L + 2))

for x in (-B / 2, B / 2):

body = body.cut(cq.Workplane("XY").workplane(offset=-1).center(x, 0).circle(S / 2).extrude(T + 2))

if detail == "full":

slit = 0.05 * G

body = body.cut(cq.Workplane("XY").workplane(offset=T).center(0, (D / 2 * 0.9 + top + 1) / 2).rect(slit, top + 1 - D / 2 * 0.9).extrude(L - T + 1))

body = body.cut(cq.Workplane("YZ").center((R + top) / 2, (T + L) / 2).circle(screw / 2).extrude(2 * ear + 1, both=True))

model.add("body", body, name="Body")

model.material("steel-generic", color="#6d7075")

result = model.result()

"""Shaft support, SK (upright, foot on the XY plane, shaft along Y) and SHF (flange on the XY plane, shaft along Z), with the shaft
centred on the origin's axis. Fit dimensions come from the table in the README. The clamp's slit and clamp hole sizes are proportions, for
looks. detail = "simple" leaves out the slit and clamp hole."""
import cadquery as cq
from steve import Model

designation = "SK8"  # Shaft support
detail = "full"  # full: with the clamp's slit and hole; simple: bore and mounting holes only

# type: (bore D, centre height h, half width E, width W, thickness L, height F, foot G, top width P, hole pitch B, hole S, clamp screw).
# Motion-and-Drives, SK steel shaft supports technical specifications, revision 12.03.2021,
# https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SK_supports_technical_specification.pdf
SK = {
    "SK8": (8, 20, 21, 42, 14, 32.8, 6, 18, 32, 5.5, 4), "SK10": (10, 20, 21, 42, 14, 32.8, 6, 18, 32, 5.5, 4),
    "SK12": (12, 23, 21, 42, 14, 37.5, 6, 20, 32, 5.5, 4), "SK16": (16, 27, 24, 48, 16, 44, 8, 25, 38, 5.5, 4),
    "SK20": (20, 31, 30, 60, 20, 51, 10, 30, 45, 6.6, 5), "SK25": (25, 35, 35, 70, 24, 60, 12, 38, 56, 6.6, 6),
    "SK30": (30, 42, 42, 84, 28, 70, 12, 44, 64, 9, 6), "SK35": (35, 50, 49, 98, 32, 82, 15, 50, 74, 11, 8),
    "SK40": (40, 60, 57, 114, 36, 96, 15, 60, 90, 11, 8),
}
# type: (bore D, width W, length L, flange T, height F, boss G, hole pitch B, hole S, clamp screw).
# Motion-and-Drives, SHF steel shaft supports technical specifications, revision 12.03.2021,
# https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SHF_supports_technical_specification.pdf
SHF = {
    "SHF10": (10, 43, 10, 5, 24, 20, 32, 5.5, 4), "SHF12": (12, 47, 13, 7, 28, 25, 36, 5.5, 4), "SHF16": (16, 50, 16, 8, 31, 28, 40, 5.5, 4),
    "SHF20": (20, 60, 20, 8, 37, 34, 48, 7, 5), "SHF25": (25, 70, 25, 10, 42, 40, 56, 7, 5), "SHF30": (30, 80, 30, 12, 50, 46, 64, 9, 6),
    "SHF35": (35, 92, 35, 14, 58, 50, 72, 12, 8), "SHF40": (40, 102, 40, 16, 67, 56, 80, 12, 10),
}

model = Model()
if designation in SK:
    D, h, E, W, L, F, G, P, B, S, screw = SK[designation]
    root = 0.1 * P   # a small sloped root under the column, for looks
    with model.sketch("body_sketch", on="XZ", name="Body") as sk:
        sk.polyline("body", [(-W / 2, 0), (W / 2, 0), (W / 2, G), (P / 2 + root, G), (P / 2, G + root), (P / 2, F), (-P / 2, F), (-P / 2, G + root), (-P / 2 - root, G), (-W / 2, G)], closed=True)
    model.extrude("body", "body_sketch", distance=L, both=True, name="Body")
    with model.sketch("bore_sketch", on="XZ", name="Bore") as sk:
        sk.circle("bore_circle", (0, h), D / 2)
    model.extrude("bore", "bore_sketch", distance=L + 1, both=True, op="cut", name="Bore")
    with model.sketch("holes_sketch", on="XY", name="Mounting holes") as sk:
        sk.circle("hole_left", (-B / 2, 0), S / 2)
        sk.circle("hole_right", (B / 2, 0), S / 2)
    model.extrude("holes", "holes_sketch", distance=G, op="cut", name="Mounting holes")
    if detail == "full":
        slit = 0.05 * P
        with model.sketch("slit_sketch", on="XZ", name="Clamp slit") as sk:
            sk.rect("slit_rect", (-slit / 2, h), (slit / 2, F + 1))
        model.extrude("slit", "slit_sketch", distance=L + 1, both=True, op="cut", name="Clamp slit")
        clamp_z = (h + D / 2 + F) / 2
        with model.sketch("clamp_sketch", on="YZ", name="Clamp hole") as sk:
            sk.circle("clamp_circle", (0, clamp_z), screw / 2)
        model.extrude("clamp_hole", "clamp_sketch", distance=P + 1, both=True, op="cut", name="Clamp hole")
    model.note("centre_height", f"Centre height h = {h} +/-0.02, half width E = {E} +/-0.05 (maker's table)")
else:
    D, W, L, T, F, G, B, S, screw = SHF[designation]
    r = (W - B) / 2
    R = G / 2
    # the flange: the boss's circle and the two ears, joined by straight sides
    flange = (cq.Workplane("XY").moveTo(-B / 2, -r).lineTo(0, -R).lineTo(B / 2, -r).threePointArc((W / 2, 0), (B / 2, r))
              .lineTo(0, R).lineTo(-B / 2, r).threePointArc((-W / 2, 0), (-B / 2, -r)).close().extrude(T))
    body = flange.union(cq.Workplane("XY").circle(R).extrude(L), clean=False)
    top = F - R
    ear = 0.2 * G
    body = body.union(cq.Workplane("XY").workplane(offset=T).center(0, (R * 0.7 + top) / 2).rect(2 * ear, top - R * 0.7).extrude(L - T), clean=False)
    body = body.cut(cq.Workplane("XY").workplane(offset=-1).circle(D / 2).extrude(L + 2))
    for x in (-B / 2, B / 2):
        body = body.cut(cq.Workplane("XY").workplane(offset=-1).center(x, 0).circle(S / 2).extrude(T + 2))
    if detail == "full":
        slit = 0.05 * G
        body = body.cut(cq.Workplane("XY").workplane(offset=T).center(0, (D / 2 * 0.9 + top + 1) / 2).rect(slit, top + 1 - D / 2 * 0.9).extrude(L - T + 1))
        body = body.cut(cq.Workplane("YZ").center((R + top) / 2, (T + L) / 2).circle(screw / 2).extrude(2 * ear + 1, both=True))
    model.add("body", body, name="Body")
model.material("steel-generic", color="#6d7075")
result = model.result()

pypart.toml 147 lines · TOML

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name = "steve/shaft-support"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Shaft support: SK8 to SK40 upright and SHF10 to SHF40 flanged, for round linear shafts."

description = """Shaft supports for round linear shafts: SK upright clamp blocks and SHF flanged clamps. Fit dimensions from the maker's tables; the clamp's slit and screw hole are proportions, for looks. See the README."""

tags = ["shaft-support", "sk", "shf", "linear-shaft", "motion", "metric"]

[parameters.designation]

type = "choice"

default = "SK8"

choices = ["SK8", "SK10", "SK12", "SK16", "SK20", "SK25", "SK30", "SK35", "SK40", "SHF10", "SHF12", "SHF16", "SHF20", "SHF25", "SHF30", "SHF35", "SHF40"]

label = "Type"

[parameters.detail]

type = "choice"

default = "full"

choices = ["full", "simple"]

label = "Detail"

description = "full: with the clamp's slit and screw hole. simple: bore and mounting holes only."

[[presets]]

id = "SHF10"

title = "SHF10 shaft support, 10 mm"

params = { designation = "SHF10" }

aliases = ["SHF10", "shaft diameter=10 mm; support style=SHF; generic clamping/flange envelope", "SHF10 shaft support", "10 mm shaft support", "10mm shaft support", "10mm shaft holder", "SHF10 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SHF12"

title = "SHF12 shaft support, 12 mm"

params = { designation = "SHF12" }

aliases = ["SHF12", "shaft diameter=12 mm; support style=SHF; generic clamping/flange envelope", "SHF12 shaft support", "12 mm shaft support", "12mm shaft support", "12mm shaft holder", "SHF12 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SHF16"

title = "SHF16 shaft support, 16 mm"

params = { designation = "SHF16" }

aliases = ["SHF16", "shaft diameter=16 mm; support style=SHF; generic clamping/flange envelope", "SHF16 shaft support", "16 mm shaft support", "16mm shaft support", "16mm shaft holder", "SHF16 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SHF20"

title = "SHF20 shaft support, 20 mm"

params = { designation = "SHF20" }

aliases = ["SHF20", "shaft diameter=20 mm; support style=SHF; generic clamping/flange envelope", "SHF20 shaft support", "20 mm shaft support", "20mm shaft support", "20mm shaft holder", "SHF20 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SHF25"

title = "SHF25 shaft support, 25 mm"

params = { designation = "SHF25" }

aliases = ["SHF25", "shaft diameter=25 mm; support style=SHF; generic clamping/flange envelope", "SHF25 shaft support", "25 mm shaft support", "25mm shaft support", "25mm shaft holder", "SHF25 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SK8"

title = "SK8 shaft support, 8 mm"

params = { designation = "SK8" }

aliases = ["SK8 shaft support", "8 mm shaft support", "8mm shaft support", "8mm shaft holder", "SK8 support", "SK8 shaft support, 8 mm", "SK8", "shaft diameter=8 mm; support style=SK; generic clamping/flange envelope", "SK8 SC8UU 8 mm shaft support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SK10"

title = "SK10 shaft support, 10 mm"

params = { designation = "SK10" }

aliases = ["SK10", "shaft diameter=10 mm; support style=SK; generic clamping/flange envelope", "SK10 shaft support", "10 mm shaft support", "10mm shaft support", "10mm shaft holder", "SK10 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SK12"

title = "SK12 shaft support, 12 mm"

params = { designation = "SK12" }

aliases = ["SK12", "shaft diameter=12 mm; support style=SK; generic clamping/flange envelope", "SK12 shaft support", "12 mm shaft support", "12mm shaft support", "12mm shaft holder", "SK12 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SK16"

title = "SK16 shaft support, 16 mm"

params = { designation = "SK16" }

aliases = ["SK16", "shaft diameter=16 mm; support style=SK; generic clamping/flange envelope", "SK16 shaft support", "16 mm shaft support", "16mm shaft support", "16mm shaft holder", "SK16 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SK20"

title = "SK20 shaft support, 20 mm"

params = { designation = "SK20" }

aliases = ["SK20", "shaft diameter=20 mm; support style=SK; generic clamping/flange envelope", "SK20 shaft support", "20 mm shaft support", "20mm shaft support", "20mm shaft holder", "SK20 support"]

standard = "Motion-and-Drives"

[[presets]]

id = "SK25"

title = "SK25 shaft support, 25 mm"

params = { designation = "SK25" }

aliases = ["SK25", "shaft diameter=25 mm; support style=SK; generic clamping/flange envelope", "SK25 shaft support", "25 mm shaft support", "25mm shaft support", "25mm shaft holder", "SK25 support"]

standard = "Motion-and-Drives"

[[presets]]

100

id = "SK30"

101

title = "SK30 shaft support, 30 mm"

102

params = { designation = "SK30" }

103

aliases = ["SK30 shaft support", "30 mm shaft support", "30mm shaft support", "30mm shaft holder", "SK30 support"]

104

standard = "Motion-and-Drives"

105

106

[[presets]]

107

id = "SK35"

108

title = "SK35 shaft support, 35 mm"

109

params = { designation = "SK35" }

110

aliases = ["SK35 shaft support", "35 mm shaft support", "35mm shaft support", "35mm shaft holder", "SK35 support"]

111

standard = "Motion-and-Drives"

112

113

[[presets]]

114

id = "SK40"

115

title = "SK40 shaft support, 40 mm"

116

params = { designation = "SK40" }

117

aliases = ["SK40 shaft support", "40 mm shaft support", "40mm shaft support", "40mm shaft holder", "SK40 support"]

118

standard = "Motion-and-Drives"

119

120

[[presets]]

121

id = "SHF30"

122

title = "SHF30 shaft support, 30 mm"

123

params = { designation = "SHF30" }

124

aliases = ["SHF30 shaft support", "30 mm shaft support", "30mm shaft support", "30mm shaft holder", "SHF30 support"]

125

standard = "Motion-and-Drives"

126

127

[[presets]]

128

id = "SHF35"

129

title = "SHF35 shaft support, 35 mm"

130

params = { designation = "SHF35" }

131

aliases = ["SHF35 shaft support", "35 mm shaft support", "35mm shaft support", "35mm shaft holder", "SHF35 support"]

132

standard = "Motion-and-Drives"

133

134

[[presets]]

135

id = "SHF40"

136

title = "SHF40 shaft support, 40 mm"

137

params = { designation = "SHF40" }

138

aliases = ["SHF40 shaft support", "40 mm shaft support", "40mm shaft support", "40mm shaft holder", "SHF40 support"]

139

standard = "Motion-and-Drives"

140

141

[[presets]]

142

id = "SK8-simple"

143

title = "SK8, simple (no clamp slit)"

144

params = { designation = "SK8", detail = "simple" }

145

aliases = ["SK8 simple"]

146

standard = "Motion-and-Drives"

147

name = "steve/shaft-support"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Shaft support: SK8 to SK40 upright and SHF10 to SHF40 flanged, for round linear shafts."
description = """Shaft supports for round linear shafts: SK upright clamp blocks and SHF flanged clamps. Fit dimensions from the maker's tables; the clamp's slit and screw hole are proportions, for looks. See the README."""
tags = ["shaft-support", "sk", "shf", "linear-shaft", "motion", "metric"]

[parameters.designation]
type = "choice"
default = "SK8"
choices = ["SK8", "SK10", "SK12", "SK16", "SK20", "SK25", "SK30", "SK35", "SK40", "SHF10", "SHF12", "SHF16", "SHF20", "SHF25", "SHF30", "SHF35", "SHF40"]
label = "Type"

[parameters.detail]
type = "choice"
default = "full"
choices = ["full", "simple"]
label = "Detail"
description = "full: with the clamp's slit and screw hole. simple: bore and mounting holes only."

[[presets]]
id = "SHF10"
title = "SHF10 shaft support, 10 mm"
params = { designation = "SHF10" }
aliases = ["SHF10", "shaft diameter=10 mm; support style=SHF; generic clamping/flange envelope", "SHF10 shaft support", "10 mm shaft support", "10mm shaft support", "10mm shaft holder", "SHF10 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF12"
title = "SHF12 shaft support, 12 mm"
params = { designation = "SHF12" }
aliases = ["SHF12", "shaft diameter=12 mm; support style=SHF; generic clamping/flange envelope", "SHF12 shaft support", "12 mm shaft support", "12mm shaft support", "12mm shaft holder", "SHF12 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF16"
title = "SHF16 shaft support, 16 mm"
params = { designation = "SHF16" }
aliases = ["SHF16", "shaft diameter=16 mm; support style=SHF; generic clamping/flange envelope", "SHF16 shaft support", "16 mm shaft support", "16mm shaft support", "16mm shaft holder", "SHF16 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF20"
title = "SHF20 shaft support, 20 mm"
params = { designation = "SHF20" }
aliases = ["SHF20", "shaft diameter=20 mm; support style=SHF; generic clamping/flange envelope", "SHF20 shaft support", "20 mm shaft support", "20mm shaft support", "20mm shaft holder", "SHF20 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF25"
title = "SHF25 shaft support, 25 mm"
params = { designation = "SHF25" }
aliases = ["SHF25", "shaft diameter=25 mm; support style=SHF; generic clamping/flange envelope", "SHF25 shaft support", "25 mm shaft support", "25mm shaft support", "25mm shaft holder", "SHF25 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK8"
title = "SK8 shaft support, 8 mm"
params = { designation = "SK8" }
aliases = ["SK8 shaft support", "8 mm shaft support", "8mm shaft support", "8mm shaft holder", "SK8 support", "SK8 shaft support, 8 mm", "SK8", "shaft diameter=8 mm; support style=SK; generic clamping/flange envelope", "SK8 SC8UU 8 mm shaft support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK10"
title = "SK10 shaft support, 10 mm"
params = { designation = "SK10" }
aliases = ["SK10", "shaft diameter=10 mm; support style=SK; generic clamping/flange envelope", "SK10 shaft support", "10 mm shaft support", "10mm shaft support", "10mm shaft holder", "SK10 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK12"
title = "SK12 shaft support, 12 mm"
params = { designation = "SK12" }
aliases = ["SK12", "shaft diameter=12 mm; support style=SK; generic clamping/flange envelope", "SK12 shaft support", "12 mm shaft support", "12mm shaft support", "12mm shaft holder", "SK12 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK16"
title = "SK16 shaft support, 16 mm"
params = { designation = "SK16" }
aliases = ["SK16", "shaft diameter=16 mm; support style=SK; generic clamping/flange envelope", "SK16 shaft support", "16 mm shaft support", "16mm shaft support", "16mm shaft holder", "SK16 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK20"
title = "SK20 shaft support, 20 mm"
params = { designation = "SK20" }
aliases = ["SK20", "shaft diameter=20 mm; support style=SK; generic clamping/flange envelope", "SK20 shaft support", "20 mm shaft support", "20mm shaft support", "20mm shaft holder", "SK20 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK25"
title = "SK25 shaft support, 25 mm"
params = { designation = "SK25" }
aliases = ["SK25", "shaft diameter=25 mm; support style=SK; generic clamping/flange envelope", "SK25 shaft support", "25 mm shaft support", "25mm shaft support", "25mm shaft holder", "SK25 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK30"
title = "SK30 shaft support, 30 mm"
params = { designation = "SK30" }
aliases = ["SK30 shaft support", "30 mm shaft support", "30mm shaft support", "30mm shaft holder", "SK30 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK35"
title = "SK35 shaft support, 35 mm"
params = { designation = "SK35" }
aliases = ["SK35 shaft support", "35 mm shaft support", "35mm shaft support", "35mm shaft holder", "SK35 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK40"
title = "SK40 shaft support, 40 mm"
params = { designation = "SK40" }
aliases = ["SK40 shaft support", "40 mm shaft support", "40mm shaft support", "40mm shaft holder", "SK40 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF30"
title = "SHF30 shaft support, 30 mm"
params = { designation = "SHF30" }
aliases = ["SHF30 shaft support", "30 mm shaft support", "30mm shaft support", "30mm shaft holder", "SHF30 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF35"
title = "SHF35 shaft support, 35 mm"
params = { designation = "SHF35" }
aliases = ["SHF35 shaft support", "35 mm shaft support", "35mm shaft support", "35mm shaft holder", "SHF35 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SHF40"
title = "SHF40 shaft support, 40 mm"
params = { designation = "SHF40" }
aliases = ["SHF40 shaft support", "40 mm shaft support", "40mm shaft support", "40mm shaft holder", "SHF40 support"]
standard = "Motion-and-Drives"

[[presets]]
id = "SK8-simple"
title = "SK8, simple (no clamp slit)"
params = { designation = "SK8", detail = "simple" }
aliases = ["SK8 simple"]
standard = "Motion-and-Drives"

README.md 15 lines · Markdown

Download

Shaft support

Clamp blocks for round linear shafts. SK stands upright with its foot on the XY plane and the shaft along Y, centred at height h. SHF has its flange on the XY plane and the shaft along Z through the origin.

Source

SK: Motion-and-Drives, SK steel shaft supports technical specifications, revision 12.03.2021, https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SK_supports_technical_specification.pdf
SHF: Motion-and-Drives, SHF steel shaft supports technical specifications, revision 12.03.2021, https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SHF_supports_technical_specification.pdf

Bore, heights, widths, thicknesses, hole pitch and hole diameters are the table's. SK states h +/-0.02 and E +/-0.05, carried as a note.

Proportions, for looks only: the clamp slit's width, the clamp hole's height, the small root under the SK column, and the width of the SHF clamp block. None changes a fit dimension. The clamp screw isn't modelled; its hole is the fastening screw's nominal size.

Other makers' SK and SHF blocks are usually close to these but not always identical: check the drawing of the one you buy. SHF8 isn't in this table, so it isn't offered.

# Shaft support

Clamp blocks for round linear shafts. SK stands upright with its foot on the XY plane and the shaft along Y, centred at height h. SHF has its flange on the XY plane and the shaft along Z through the origin.

## Source

- SK: Motion-and-Drives, *SK steel shaft supports technical specifications*, revision 12.03.2021, <https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SK_supports_technical_specification.pdf>
- SHF: Motion-and-Drives, *SHF steel shaft supports technical specifications*, revision 12.03.2021, <https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SHF_supports_technical_specification.pdf>

Bore, heights, widths, thicknesses, hole pitch and hole diameters are the table's. SK states h +/-0.02 and E +/-0.05, carried as a note.

**Proportions, for looks only:** the clamp slit's width, the clamp hole's height, the small root under the SK column, and the width of the SHF clamp block. None changes a fit dimension. The clamp screw isn't modelled; its hole is the fastening screw's nominal size.

Other makers' SK and SHF blocks are usually close to these but not always identical: check the drawing of the one you buy. SHF8 isn't in this table, so it isn't offered.

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/shaft-support/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/shaft-support/1.0.0"

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

About this part

steve90 parts

Profile

Steel (generic)Carbon & alloy steels · Custom finish · 7.9 g/cm³

Mass: 71.2 g

At the parameters shown in the viewer.

License: MIT

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

Runtime: STEVE
Requirements: 1 · ISO
Built with: CadQuery 2.9.0.dev0
Published: Nov 5, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: e90d58ef3d1b…

#shaft-support #sk #shf #linear-shaft #motion #metric

Checks

PassedImports: cadquery, steve

Every published part passes our checks before it’s listed. It is still code: read it before you use it.

Request a removal A copyright notice, or a trademark, confidential design, safety, malicious code or other problem. Report an illegal or prohibited item

Shaft supports for round linear shafts: SK upright clamp blocks and SHF flanged clamps. Fit dimensions from the maker's tables; the clamp's slit and screw hole are proportions, for looks. See the README.

Shaft support

Source

SK: Motion-and-Drives, SK steel shaft supports technical specifications, revision 12.03.2021, https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SK_supports_technical_specification.pdf
SHF: Motion-and-Drives, SHF steel shaft supports technical specifications, revision 12.03.2021, https://cdn.shopify.com/s/files/1/0509/9690/4105/files/SHF_supports_technical_specification.pdf

Bore, heights, widths, thicknesses, hole pitch and hole diameters are the table's. SK states h +/-0.02 and E +/-0.05, carried as a note.

Other makers' SK and SHF blocks are usually close to these but not always identical: check the drawing of the one you buy. SHF8 isn't in this table, so it isn't offered.

Standard: ISO · independency principle Not stated in the code: the steve runtime’s default.
General tolerance: None stated

Inspection list (CSV) Each characteristic with its nominal, limits and datums, at the parameters shown; ISO 2768-1 and ISO 286 values worked out.

1 requirement At the default parameters.

centre_height L52

Select a requirement to show its faces in the 3D view; edges aren’t marked there. This build’s 3D preview doesn’t map its faces, so a requirement’s faces can’t be shown there. Requirements are written in the part’s code and compiled by the steve runtime at each build; nothing is exported as a file.

1.0.0 Latest Nov 5, 2026 · 2 hours ago

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