steve/oldham-coupling

Oldham shaft coupling, clamping type: 15 to 26, bores 4 to 12 mm.

v1.0.0 Latest STEVE MIT 0

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Open in STEVE

Isometric

Parameters

Preset17 sizes

Coupling number

15172026

Bore 110 options

Bore 210 options

d1 <= d2, both offered on the coupling number chosen.

Detail

fullsimple

full: hubs, spacer, slits and clamp screw holes. simple: one solid with the bores.

Defaults built

part.py 51 lines · Python · STEVE runtime · checked

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"""Oldham shaft coupling, clamping type: two hubs and a spacer. Axis along Z, the first hub's end face on the XY plane, bore d1 in the first hub, bore d2 in the second.

Fit dimensions from MISUMI's table; see the README."""

import cadquery as cq

from steve import Model

size = 20 # Coupling number

d1 = 6 # mm Bore 1 (d1 <= d2)

d2 = 8 # mm Bore 2

detail = "full" # full: hubs, spacer, slits and clamp screw holes; simple: one solid with the bores

# number: (hub D, spacer D1, spacer bore d3, L, hub length l, screw offset A, screw from the end F, clamp screw M, bores offered).

# MISUMI Couplings catalogue, Oldham Couplings, Clamping, MCOC table, https://de.misumi-ec.com/files/images/products/docs/flexibleshaftcouplings.pdf, PDF p. 16.

SIZES = {

15: (14.5, 15, 5.0, 18.4, 6.6, 4.5, 3.2, 2.5, (4, 5, 6)),

17: (16.8, 17.5, 7.2, 24.4, 9, 5, 4, 3, (5, 6, 6.35)),

20: (20, 21, 8.2, 27.2, 10, 7, 4.5, 3, (6, 6.35, 7, 8, 9.53, 10)),

26: (26, 27, 12.0, 30.4, 11.5, 8.4, 5, 4, (6, 6.35, 7, 8, 9.53, 10, 11, 12)),

}

D, D1, d3, L, hub, A, F, screw, bores = SIZES[size]

if d1 not in bores or d2 not in bores or d1 > d2:

raise ValueError(f"The number {size} Oldham coupling offers bores {bores}, with d1 <= d2.")

SLIT = 0.05 * D # the slit's width, for looks

def half(z0, bore):

shape = cq.Workplane("XY").workplane(offset=z0).circle(D / 2).extrude(hub)

shape = shape.cut(cq.Workplane("XY").workplane(offset=z0 - 1).circle(bore / 2).extrude(hub + 2))

shape = shape.cut(cq.Workplane("XY").workplane(offset=z0 - 1).center(D / 4 + 0.5, 0).rect(D / 2 + 1, SLIT).extrude(hub + 2))

return shape

model = Model()

if detail == "simple":

body = cq.Workplane("XY").circle(D / 2).extrude(L).union(cq.Workplane("XY").workplane(offset=hub).circle(D1 / 2).extrude(L - 2 * hub), clean=False)

body = body.cut(cq.Workplane("XY").workplane(offset=-1).circle(d1 / 2).extrude(L / 2 + 1))

body = body.cut(cq.Workplane("XY").workplane(offset=L / 2).circle(d2 / 2).extrude(L / 2 + 1))

model.add("body", body, name="Oldham coupling")

model.material("steel-generic", color="#9a9da3")

else:

first, second = half(0, d1), half(L - hub, d2)

for z in (F, L - F):

cross = cq.Workplane("YZ").center(A, z).circle(screw / 2).extrude(D, both=True)

first, second = first.cut(cross), second.cut(cross)

spacer = cq.Workplane("XY").workplane(offset=hub).circle(D1 / 2).circle(d3 / 2).extrude(L - 2 * hub)

model.add("hub_1", first, op="new", body="hub_1_body", name="Hub, d1")

model.add("hub_2", second, op="new", body="hub_2_body", name="Hub, d2")

model.add("spacer", spacer, op="new", body="spacer_body", name="Spacer")

model.material("steel-generic", bodies=["hub_1_body", "hub_2_body"], color="#9a9da3")

model.material("pa6", bodies=["spacer_body"], color="#26282b")

result = model.result()

"""Oldham shaft coupling, clamping type: two hubs and a spacer. Axis along Z, the first hub's end face on the XY plane, bore d1 in the first hub, bore d2 in the second.
Fit dimensions from MISUMI's table; see the README."""
import cadquery as cq
from steve import Model

size = 20  # Coupling number
d1 = 6  # mm Bore 1 (d1 <= d2)
d2 = 8  # mm Bore 2
detail = "full"  # full: hubs, spacer, slits and clamp screw holes; simple: one solid with the bores

# number: (hub D, spacer D1, spacer bore d3, L, hub length l, screw offset A, screw from the end F, clamp screw M, bores offered).
# MISUMI Couplings catalogue, Oldham Couplings, Clamping, MCOC table, https://de.misumi-ec.com/files/images/products/docs/flexibleshaftcouplings.pdf, PDF p. 16.
SIZES = {
    15: (14.5, 15, 5.0, 18.4, 6.6, 4.5, 3.2, 2.5, (4, 5, 6)),
    17: (16.8, 17.5, 7.2, 24.4, 9, 5, 4, 3, (5, 6, 6.35)),
    20: (20, 21, 8.2, 27.2, 10, 7, 4.5, 3, (6, 6.35, 7, 8, 9.53, 10)),
    26: (26, 27, 12.0, 30.4, 11.5, 8.4, 5, 4, (6, 6.35, 7, 8, 9.53, 10, 11, 12)),
}
D, D1, d3, L, hub, A, F, screw, bores = SIZES[size]
if d1 not in bores or d2 not in bores or d1 > d2:
    raise ValueError(f"The number {size} Oldham coupling offers bores {bores}, with d1 <= d2.")
SLIT = 0.05 * D   # the slit's width, for looks


def half(z0, bore):
    shape = cq.Workplane("XY").workplane(offset=z0).circle(D / 2).extrude(hub)
    shape = shape.cut(cq.Workplane("XY").workplane(offset=z0 - 1).circle(bore / 2).extrude(hub + 2))
    shape = shape.cut(cq.Workplane("XY").workplane(offset=z0 - 1).center(D / 4 + 0.5, 0).rect(D / 2 + 1, SLIT).extrude(hub + 2))
    return shape


model = Model()
if detail == "simple":
    body = cq.Workplane("XY").circle(D / 2).extrude(L).union(cq.Workplane("XY").workplane(offset=hub).circle(D1 / 2).extrude(L - 2 * hub), clean=False)
    body = body.cut(cq.Workplane("XY").workplane(offset=-1).circle(d1 / 2).extrude(L / 2 + 1))
    body = body.cut(cq.Workplane("XY").workplane(offset=L / 2).circle(d2 / 2).extrude(L / 2 + 1))
    model.add("body", body, name="Oldham coupling")
    model.material("steel-generic", color="#9a9da3")
else:
    first, second = half(0, d1), half(L - hub, d2)
    for z in (F, L - F):
        cross = cq.Workplane("YZ").center(A, z).circle(screw / 2).extrude(D, both=True)
        first, second = first.cut(cross), second.cut(cross)
    spacer = cq.Workplane("XY").workplane(offset=hub).circle(D1 / 2).circle(d3 / 2).extrude(L - 2 * hub)
    model.add("hub_1", first, op="new", body="hub_1_body", name="Hub, d1")
    model.add("hub_2", second, op="new", body="hub_2_body", name="Hub, d2")
    model.add("spacer", spacer, op="new", body="spacer_body", name="Spacer")
    model.material("steel-generic", bodies=["hub_1_body", "hub_2_body"], color="#9a9da3")
    model.material("pa6", bodies=["spacer_body"], color="#26282b")
result = model.result()

pypart.toml 155 lines · TOML

Download

name = "steve/oldham-coupling"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Oldham shaft coupling, clamping type: 15 to 26, bores 4 to 12 mm."

description = """Oldham shaft coupling, clamping type, as two hubs and a spacer with slits and clamp screw holes. Sizes and bores from MISUMI's MCOC table. See the README."""

tags = ["coupling", "shaft-coupling", "oldham-coupling", "power-transmission", "metric"]

[parameters.size]

type = "choice"

default = 20

choices = [15, 17, 20, 26]

label = "Coupling number"

[parameters.d1]

type = "choice"

default = 6

choices = [4, 5, 6, 6.35, 7, 8, 9.53, 10, 11, 12]

unit = "mm"

label = "Bore 1"

[parameters.d2]

type = "choice"

default = 8

choices = [4, 5, 6, 6.35, 7, 8, 9.53, 10, 11, 12]

unit = "mm"

label = "Bore 2"

description = "d1 <= d2, both offered on the coupling number chosen."

[parameters.detail]

type = "choice"

default = "full"

choices = ["full", "simple"]

label = "Detail"

description = "full: hubs, spacer, slits and clamp screw holes. simple: one solid with the bores."

[[presets]]

id = "MCOC15-4-4"

title = "Oldham coupling 15, 4 to 4 mm"

params = { size = 15, d1 = 4, d2 = 4 }

aliases = ["4x4 oldham coupling", "4 to 4 oldham coupling", "4mm to 4mm oldham coupling", "4-4 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=4 mm; bore2=4 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC15-4-5"

title = "Oldham coupling 15, 4 to 5 mm"

params = { size = 15, d1 = 4, d2 = 5 }

aliases = ["4x5 oldham coupling", "4 to 5 oldham coupling", "4mm to 5mm oldham coupling", "4-5 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=4 mm; bore2=5 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC15-4-6"

title = "Oldham coupling 15, 4 to 6 mm"

params = { size = 15, d1 = 4, d2 = 6 }

aliases = ["4x6 oldham coupling", "4 to 6 oldham coupling", "4mm to 6mm oldham coupling", "4-6 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=4 mm; bore2=6 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC15-5-5"

title = "Oldham coupling 15, 5 to 5 mm"

params = { size = 15, d1 = 5, d2 = 5 }

aliases = ["5x5 oldham coupling", "5 to 5 oldham coupling", "5mm to 5mm oldham coupling", "5-5 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=5 mm; bore2=5 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC15-5-6"

title = "Oldham coupling 15, 5 to 6 mm"

params = { size = 15, d1 = 5, d2 = 6 }

aliases = ["5x6 oldham coupling", "5 to 6 oldham coupling", "5mm to 6mm oldham coupling", "5-6 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=5 mm; bore2=6 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC15-6-6"

title = "Oldham coupling 15, 6 to 6 mm"

params = { size = 15, d1 = 6, d2 = 6 }

aliases = ["6x6 oldham coupling", "6 to 6 oldham coupling", "6mm to 6mm oldham coupling", "6-6 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=6 mm; bore2=6 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC17-5-6.35"

title = "Oldham coupling 17, 5 to 6.35 mm"

params = { size = 17, d1 = 5, d2 = 6.35 }

aliases = ["5x6.35 oldham coupling", "5 to 6.35 oldham coupling", "5mm to 6.35mm oldham coupling", "5-6.35 oldham coupling", "MCOC17", "oldham coupling 17", "coupling kind=oldham_coupling; bore1=5 mm; bore2=6.35 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC17-6-6.35"

title = "Oldham coupling 17, 6 to 6.35 mm"

params = { size = 17, d1 = 6, d2 = 6.35 }

aliases = ["6x6.35 oldham coupling", "6 to 6.35 oldham coupling", "6mm to 6.35mm oldham coupling", "6-6.35 oldham coupling", "MCOC17", "oldham coupling 17", "coupling kind=oldham_coupling; bore1=6 mm; bore2=6.35 mm; set screw/clamp envelope"]

standard = "MISUMI"

[[presets]]

id = "MCOC17-6.35-6.35"

title = "Oldham coupling 17, 6.35 to 6.35 mm"

params = { size = 17, d1 = 6.35, d2 = 6.35 }

aliases = ["6.35x6.35 oldham coupling", "6.35 to 6.35 oldham coupling", "6.35mm to 6.35mm oldham coupling", "6.35-6.35 oldham coupling", "MCOC17", "oldham coupling 17", "coupling kind=oldham_coupling; bore1=6.35 mm; bore2=6.35 mm; set screw/clamp envelope"]

standard = "MISUMI"

100

[[presets]]

101

id = "MCOC20-6-8"

102

title = "Oldham coupling 20, 6 to 8 mm"

103

params = { size = 20, d1 = 6, d2 = 8 }

104

aliases = ["6x8 oldham coupling", "6 to 8 oldham coupling", "6mm to 8mm oldham coupling", "6-8 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6 mm; bore2=8 mm; set screw/clamp envelope"]

105

standard = "MISUMI"

106

107

[[presets]]

108

id = "MCOC20-6-10"

109

title = "Oldham coupling 20, 6 to 10 mm"

110

params = { size = 20, d1 = 6, d2 = 10 }

111

aliases = ["6x10 oldham coupling", "6 to 10 oldham coupling", "6mm to 10mm oldham coupling", "6-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6 mm; bore2=10 mm; set screw/clamp envelope"]

112

standard = "MISUMI"

113

114

[[presets]]

115

id = "MCOC20-6.35-8"

116

title = "Oldham coupling 20, 6.35 to 8 mm"

117

params = { size = 20, d1 = 6.35, d2 = 8 }

118

aliases = ["6.35x8 oldham coupling", "6.35 to 8 oldham coupling", "6.35mm to 8mm oldham coupling", "6.35-8 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6.35 mm; bore2=8 mm; set screw/clamp envelope"]

119

standard = "MISUMI"

120

121

[[presets]]

122

id = "MCOC20-6.35-10"

123

title = "Oldham coupling 20, 6.35 to 10 mm"

124

params = { size = 20, d1 = 6.35, d2 = 10 }

125

aliases = ["6.35x10 oldham coupling", "6.35 to 10 oldham coupling", "6.35mm to 10mm oldham coupling", "6.35-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6.35 mm; bore2=10 mm; set screw/clamp envelope"]

126

standard = "MISUMI"

127

128

[[presets]]

129

id = "MCOC20-8-8"

130

title = "Oldham coupling 20, 8 to 8 mm"

131

params = { size = 20, d1 = 8, d2 = 8 }

132

aliases = ["8x8 oldham coupling", "8 to 8 oldham coupling", "8mm to 8mm oldham coupling", "8-8 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=8 mm; bore2=8 mm; set screw/clamp envelope"]

133

standard = "MISUMI"

134

135

[[presets]]

136

id = "MCOC20-8-10"

137

title = "Oldham coupling 20, 8 to 10 mm"

138

params = { size = 20, d1 = 8, d2 = 10 }

139

aliases = ["8x10 oldham coupling", "8 to 10 oldham coupling", "8mm to 10mm oldham coupling", "8-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=8 mm; bore2=10 mm; set screw/clamp envelope"]

140

standard = "MISUMI"

141

142

[[presets]]

143

id = "MCOC20-10-10"

144

title = "Oldham coupling 20, 10 to 10 mm"

145

params = { size = 20, d1 = 10, d2 = 10 }

146

aliases = ["10x10 oldham coupling", "10 to 10 oldham coupling", "10mm to 10mm oldham coupling", "10-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=10 mm; bore2=10 mm; set screw/clamp envelope"]

147

standard = "MISUMI"

148

149

[[presets]]

150

id = "MCOC20-6-8-simple"

151

title = "Oldham coupling 20, 6 to 8 mm, simple"

152

params = { size = 20, d1 = 6, d2 = 8, detail = "simple" }

153

aliases = ["MCOC20-6-8 simple"]

154

standard = "MISUMI"

155

name = "steve/oldham-coupling"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Oldham shaft coupling, clamping type: 15 to 26, bores 4 to 12 mm."
description = """Oldham shaft coupling, clamping type, as two hubs and a spacer with slits and clamp screw holes. Sizes and bores from MISUMI's MCOC table. See the README."""
tags = ["coupling", "shaft-coupling", "oldham-coupling", "power-transmission", "metric"]

[parameters.size]
type = "choice"
default = 20
choices = [15, 17, 20, 26]
label = "Coupling number"

[parameters.d1]
type = "choice"
default = 6
choices = [4, 5, 6, 6.35, 7, 8, 9.53, 10, 11, 12]
unit = "mm"
label = "Bore 1"

[parameters.d2]
type = "choice"
default = 8
choices = [4, 5, 6, 6.35, 7, 8, 9.53, 10, 11, 12]
unit = "mm"
label = "Bore 2"
description = "d1 <= d2, both offered on the coupling number chosen."

[parameters.detail]
type = "choice"
default = "full"
choices = ["full", "simple"]
label = "Detail"
description = "full: hubs, spacer, slits and clamp screw holes. simple: one solid with the bores."

[[presets]]
id = "MCOC15-4-4"
title = "Oldham coupling 15, 4 to 4 mm"
params = { size = 15, d1 = 4, d2 = 4 }
aliases = ["4x4 oldham coupling", "4 to 4 oldham coupling", "4mm to 4mm oldham coupling", "4-4 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=4 mm; bore2=4 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC15-4-5"
title = "Oldham coupling 15, 4 to 5 mm"
params = { size = 15, d1 = 4, d2 = 5 }
aliases = ["4x5 oldham coupling", "4 to 5 oldham coupling", "4mm to 5mm oldham coupling", "4-5 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=4 mm; bore2=5 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC15-4-6"
title = "Oldham coupling 15, 4 to 6 mm"
params = { size = 15, d1 = 4, d2 = 6 }
aliases = ["4x6 oldham coupling", "4 to 6 oldham coupling", "4mm to 6mm oldham coupling", "4-6 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=4 mm; bore2=6 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC15-5-5"
title = "Oldham coupling 15, 5 to 5 mm"
params = { size = 15, d1 = 5, d2 = 5 }
aliases = ["5x5 oldham coupling", "5 to 5 oldham coupling", "5mm to 5mm oldham coupling", "5-5 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=5 mm; bore2=5 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC15-5-6"
title = "Oldham coupling 15, 5 to 6 mm"
params = { size = 15, d1 = 5, d2 = 6 }
aliases = ["5x6 oldham coupling", "5 to 6 oldham coupling", "5mm to 6mm oldham coupling", "5-6 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=5 mm; bore2=6 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC15-6-6"
title = "Oldham coupling 15, 6 to 6 mm"
params = { size = 15, d1 = 6, d2 = 6 }
aliases = ["6x6 oldham coupling", "6 to 6 oldham coupling", "6mm to 6mm oldham coupling", "6-6 oldham coupling", "MCOC15", "oldham coupling 15", "coupling kind=oldham_coupling; bore1=6 mm; bore2=6 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC17-5-6.35"
title = "Oldham coupling 17, 5 to 6.35 mm"
params = { size = 17, d1 = 5, d2 = 6.35 }
aliases = ["5x6.35 oldham coupling", "5 to 6.35 oldham coupling", "5mm to 6.35mm oldham coupling", "5-6.35 oldham coupling", "MCOC17", "oldham coupling 17", "coupling kind=oldham_coupling; bore1=5 mm; bore2=6.35 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC17-6-6.35"
title = "Oldham coupling 17, 6 to 6.35 mm"
params = { size = 17, d1 = 6, d2 = 6.35 }
aliases = ["6x6.35 oldham coupling", "6 to 6.35 oldham coupling", "6mm to 6.35mm oldham coupling", "6-6.35 oldham coupling", "MCOC17", "oldham coupling 17", "coupling kind=oldham_coupling; bore1=6 mm; bore2=6.35 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC17-6.35-6.35"
title = "Oldham coupling 17, 6.35 to 6.35 mm"
params = { size = 17, d1 = 6.35, d2 = 6.35 }
aliases = ["6.35x6.35 oldham coupling", "6.35 to 6.35 oldham coupling", "6.35mm to 6.35mm oldham coupling", "6.35-6.35 oldham coupling", "MCOC17", "oldham coupling 17", "coupling kind=oldham_coupling; bore1=6.35 mm; bore2=6.35 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-6-8"
title = "Oldham coupling 20, 6 to 8 mm"
params = { size = 20, d1 = 6, d2 = 8 }
aliases = ["6x8 oldham coupling", "6 to 8 oldham coupling", "6mm to 8mm oldham coupling", "6-8 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6 mm; bore2=8 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-6-10"
title = "Oldham coupling 20, 6 to 10 mm"
params = { size = 20, d1 = 6, d2 = 10 }
aliases = ["6x10 oldham coupling", "6 to 10 oldham coupling", "6mm to 10mm oldham coupling", "6-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6 mm; bore2=10 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-6.35-8"
title = "Oldham coupling 20, 6.35 to 8 mm"
params = { size = 20, d1 = 6.35, d2 = 8 }
aliases = ["6.35x8 oldham coupling", "6.35 to 8 oldham coupling", "6.35mm to 8mm oldham coupling", "6.35-8 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6.35 mm; bore2=8 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-6.35-10"
title = "Oldham coupling 20, 6.35 to 10 mm"
params = { size = 20, d1 = 6.35, d2 = 10 }
aliases = ["6.35x10 oldham coupling", "6.35 to 10 oldham coupling", "6.35mm to 10mm oldham coupling", "6.35-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=6.35 mm; bore2=10 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-8-8"
title = "Oldham coupling 20, 8 to 8 mm"
params = { size = 20, d1 = 8, d2 = 8 }
aliases = ["8x8 oldham coupling", "8 to 8 oldham coupling", "8mm to 8mm oldham coupling", "8-8 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=8 mm; bore2=8 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-8-10"
title = "Oldham coupling 20, 8 to 10 mm"
params = { size = 20, d1 = 8, d2 = 10 }
aliases = ["8x10 oldham coupling", "8 to 10 oldham coupling", "8mm to 10mm oldham coupling", "8-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=8 mm; bore2=10 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-10-10"
title = "Oldham coupling 20, 10 to 10 mm"
params = { size = 20, d1 = 10, d2 = 10 }
aliases = ["10x10 oldham coupling", "10 to 10 oldham coupling", "10mm to 10mm oldham coupling", "10-10 oldham coupling", "MCOC20", "oldham coupling 20", "coupling kind=oldham_coupling; bore1=10 mm; bore2=10 mm; set screw/clamp envelope"]
standard = "MISUMI"

[[presets]]
id = "MCOC20-6-8-simple"
title = "Oldham coupling 20, 6 to 8 mm, simple"
params = { size = 20, d1 = 6, d2 = 8, detail = "simple" }
aliases = ["MCOC20-6-8 simple"]
standard = "MISUMI"

README.md 14 lines · Markdown

Download

Oldham coupling

A clamping Oldham shaft coupling: two hubs and a spacer, three solids. Axis along Z, the first hub's end face on the XY plane, bore d1 in the first hub and bore d2 in the second.

Source

MISUMI Couplings catalogue, Oldham Couplings, Clamping, MCOC table, https://de.misumi-ec.com/files/images/products/docs/flexibleshaftcouplings.pdf, PDF page 16: hub D, spacer D1, spacer bore d3, length L, hub length l, screw positions A and F, screw M, and the bores offered on each number.

Only bore pairs one number offers are presets. Numbers 30, 34 and 38 aren't here yet.

Not modelled: the tongues joining hubs to spacer, which are inside and which the table doesn't dimension, the screws (only their holes at nominal M) and the screw head's reach D2. Proportions, for looks only: the slit's width.

The table gives hubs in EN 1.4301 equivalent sintered alloy and the spacer in carbon-reinforced resin. Those aren't in the material list, so the part uses steel-generic and pa6, for looks and rough mass only.

# Oldham coupling

A clamping Oldham shaft coupling: two hubs and a spacer, three solids. Axis along Z, the first hub's end face on the XY plane, bore d1 in the first hub and bore d2 in the second.

## Source

MISUMI Couplings catalogue, *Oldham Couplings, Clamping*, MCOC table, <https://de.misumi-ec.com/files/images/products/docs/flexibleshaftcouplings.pdf>, PDF page 16: hub D, spacer D1, spacer bore d3, length L, hub length l, screw positions A and F, screw M, and the bores offered on each number.

Only bore pairs one number offers are presets. Numbers 30, 34 and 38 aren't here yet.

**Not modelled:** the tongues joining hubs to spacer, which are inside and which the table doesn't dimension, the screws (only their holes at nominal M) and the screw head's reach D2. **Proportions, for looks only:** the slit's width.

The table gives hubs in EN 1.4301 equivalent sintered alloy and the spacer in carbon-reinforced resin. Those aren't in the material list, so the part uses `steel-generic` and `pa6`, for looks and rough mass only.

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/oldham-coupling/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/oldham-coupling/1.0.0"

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

About this part

steve104 parts

Profile

Steel (generic)Carbon & alloy steels · Custom finish · 7.9 g/cm³
Polyamide 6 (nylon 6)Plastics · Custom finish · 1.15 g/cm³

Mass: 43.3 g

At the parameters shown in the viewer, 3 bodies.

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 5, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: 056550ce2d5e…

#coupling #shaft-coupling #oldham-coupling #power-transmission #metric

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Oldham shaft coupling, clamping type, as two hubs and a spacer with slits and clamp screw holes. Sizes and bores from MISUMI's MCOC table. See the README.

Oldham coupling

A clamping Oldham shaft coupling: two hubs and a spacer, three solids. Axis along Z, the first hub's end face on the XY plane, bore d1 in the first hub and bore d2 in the second.

Source

Only bore pairs one number offers are presets. Numbers 30, 34 and 38 aren't here yet.

1.0.0 Latest Nov 5, 2026 · 2 hours ago

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