steve/shaft-collar

Shaft collar: DIN 705 A set collar, bores 3 to 20 mm, and one-piece clamp collars.

v1.0.0 Latest STEVE MIT 0

Open in STEVE

Isometric

Parameters

Preset12 sizes

Style2 options

Bore3–20 mm

Set screw: 3, 4, 5, 6, 8, 10, 12, 16, 20. Clamp: 6, 8, 20.

Defaults built

part.py 40 lines · Python · STEVE runtime · checked

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"""Shaft collar: DIN 705 form A set collar with its radial set-screw hole, or a one-piece clamp collar's envelope.

Axis along Z, centred on the origin; the set-screw hole runs along +X from the bore to the outside, drawn at the thread's

nominal diameter. A clamp collar's slit and screw have no published dimensions here and aren't modelled."""

from steve import Model

style = "set-screw" # Style

bore = 8 # mm Bore

# bore: (outside diameter D, width b, thread M, set screw length). DIN 705 form A, as tabulated by Maedler (light-duty

# series, set screw DIN EN ISO 4027), item pages 623003006 ... 623020006 via https://eshop.ameco.cz/products/en/3/1625/g1574/

SET_SCREW = {

3: (7, 5, 2, 3), 4: (8, 5, 2.5, 3), 5: (10, 6, 3, 4), 6: (12, 8, 4, 5), 8: (16, 8, 4, 6),

10: (20, 10, 5, 8), 12: (22, 12, 6, 8), 16: (28, 12, 6, 8), 20: (32, 14, 6, 8),

}

# bore: (outside diameter, width). Ruland one-piece clamp collars: MCL-6-F, MCL-8-F (MCL-8-F product sheet,

# https://docs.rs-online.com/09ba/0900766b816574f5.pdf; MCL-6-F from Zoro's listing) and MCL-20-AN (40 x 15).

CLAMP = {6: (16, 9), 8: (18, 9), 20: (40, 15)}

if style == "set-screw":

if bore not in SET_SCREW:

raise ValueError(f"DIN 705 bores in the source: {', '.join(str(b) for b in SET_SCREW)} mm.")

D, b, M, screw = SET_SCREW[bore]

else:

if bore not in CLAMP:

raise ValueError(f"Clamp collar bores in the source: {', '.join(str(b) for b in CLAMP)} mm.")

D, b = CLAMP[bore]

model = Model()

with model.sketch("ring_sketch", on="XY", name="Ring") as sk:

sk.circle("outside", (0, 0), D / 2)

sk.circle("bore_d", (0, 0), bore / 2)

model.extrude("collar", "ring_sketch", distance=b, both=True, name="Collar")

if style == "set-screw":

with model.sketch("screw_sketch", on="YZ", name="Set-screw hole") as sk:

sk.circle("screw_hole", (0, 0), M / 2)

model.extrude("screw_cut", "screw_sketch", distance=D / 2, op="cut", name="Set-screw hole")

model.material("steel-generic", color="#a9adb2")

result = model.result()

"""Shaft collar: DIN 705 form A set collar with its radial set-screw hole, or a one-piece clamp collar's envelope.

Axis along Z, centred on the origin; the set-screw hole runs along +X from the bore to the outside, drawn at the thread's
nominal diameter. A clamp collar's slit and screw have no published dimensions here and aren't modelled."""
from steve import Model

style = "set-screw"  # Style
bore = 8  # mm Bore

# bore: (outside diameter D, width b, thread M, set screw length). DIN 705 form A, as tabulated by Maedler (light-duty
# series, set screw DIN EN ISO 4027), item pages 623003006 ... 623020006 via https://eshop.ameco.cz/products/en/3/1625/g1574/
SET_SCREW = {
    3: (7, 5, 2, 3), 4: (8, 5, 2.5, 3), 5: (10, 6, 3, 4), 6: (12, 8, 4, 5), 8: (16, 8, 4, 6),
    10: (20, 10, 5, 8), 12: (22, 12, 6, 8), 16: (28, 12, 6, 8), 20: (32, 14, 6, 8),
}
# bore: (outside diameter, width). Ruland one-piece clamp collars: MCL-6-F, MCL-8-F (MCL-8-F product sheet,
# https://docs.rs-online.com/09ba/0900766b816574f5.pdf; MCL-6-F from Zoro's listing) and MCL-20-AN (40 x 15).
CLAMP = {6: (16, 9), 8: (18, 9), 20: (40, 15)}

if style == "set-screw":
    if bore not in SET_SCREW:
        raise ValueError(f"DIN 705 bores in the source: {', '.join(str(b) for b in SET_SCREW)} mm.")
    D, b, M, screw = SET_SCREW[bore]
else:
    if bore not in CLAMP:
        raise ValueError(f"Clamp collar bores in the source: {', '.join(str(b) for b in CLAMP)} mm.")
    D, b = CLAMP[bore]

model = Model()
with model.sketch("ring_sketch", on="XY", name="Ring") as sk:
    sk.circle("outside", (0, 0), D / 2)
    sk.circle("bore_d", (0, 0), bore / 2)
model.extrude("collar", "ring_sketch", distance=b, both=True, name="Collar")
if style == "set-screw":
    with model.sketch("screw_sketch", on="YZ", name="Set-screw hole") as sk:
        sk.circle("screw_hole", (0, 0), M / 2)
    model.extrude("screw_cut", "screw_sketch", distance=D / 2, op="cut", name="Set-screw hole")
model.material("steel-generic", color="#a9adb2")
result = model.result()

pypart.toml 108 lines · TOML

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name = "steve/shaft-collar"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Shaft collar: DIN 705 A set collar, bores 3 to 20 mm, and one-piece clamp collars."

description = """Shaft collar for positioning on a shaft: DIN 705 form A set collar with its radial set-screw hole, or a one-piece \

clamp collar's envelope. Axis along Z, centred on the origin. See the README; not affiliated with any maker."""

tags = ["shaft-collar", "collar", "din-705", "shaft", "metric", "power-transmission"]

[parameters.style]

type = "choice"

default = "set-screw"

choices = ["set-screw", "clamp"]

label = "Style"

[parameters.bore]

type = "number"

default = 8

min = 3

max = 20

unit = "mm"

label = "Bore"

description = "Set screw: 3, 4, 5, 6, 8, 10, 12, 16, 20. Clamp: 6, 8, 20."

[[presets]]

id = "clamp-6"

title = "Clamp collar, bore 6"

params = { style = "clamp", bore = 6 }

aliases = ["6mm clamp collar", "clamp collar 6 mm", "one piece shaft collar 6", "MCL-6"]

standard = "Ruland MCL"

[[presets]]

id = "clamp-8"

title = "Clamp collar, bore 8"

params = { style = "clamp", bore = 8 }

aliases = ["8mm clamp collar", "clamp collar 8 mm", "one piece shaft collar 8", "MCL-8"]

standard = "Ruland MCL"

[[presets]]

id = "clamp-20"

title = "Clamp collar, bore 20"

params = { style = "clamp", bore = 20 }

aliases = ["20mm clamp collar", "clamp collar 20 mm", "one piece shaft collar 20", "MCL-20"]

standard = "Ruland MCL"

[[presets]]

id = "DIN705A-3"

title = "DIN 705 A, bore 3"

params = { style = "set-screw", bore = 3 }

aliases = ["DIN 705 3", "3mm shaft collar", "3 mm set collar", "set screw collar 3mm", "shaft collar 3"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-4"

title = "DIN 705 A, bore 4"

params = { style = "set-screw", bore = 4 }

aliases = ["DIN 705 4", "4mm shaft collar", "4 mm set collar", "set screw collar 4mm", "shaft collar 4"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-5"

title = "DIN 705 A, bore 5"

params = { style = "set-screw", bore = 5 }

aliases = ["DIN 705 5", "5mm shaft collar", "5 mm set collar", "set screw collar 5mm", "shaft collar 5"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-6"

title = "DIN 705 A, bore 6"

params = { style = "set-screw", bore = 6 }

aliases = ["DIN 705 6", "6mm shaft collar", "6 mm set collar", "set screw collar 6mm", "shaft collar 6"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-8"

title = "DIN 705 A, bore 8"

params = { style = "set-screw", bore = 8 }

aliases = ["DIN 705 8", "8mm shaft collar", "8 mm set collar", "set screw collar 8mm", "shaft collar 8"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-10"

title = "DIN 705 A, bore 10"

params = { style = "set-screw", bore = 10 }

aliases = ["DIN 705 10", "10mm shaft collar", "10 mm set collar", "set screw collar 10mm", "shaft collar 10"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-12"

title = "DIN 705 A, bore 12"

params = { style = "set-screw", bore = 12 }

aliases = ["DIN 705 12", "12mm shaft collar", "12 mm set collar", "set screw collar 12mm", "shaft collar 12"]

standard = "DIN 705"

[[presets]]

id = "DIN705A-16"

title = "DIN 705 A, bore 16"

params = { style = "set-screw", bore = 16 }

aliases = ["DIN 705 16", "16mm shaft collar", "16 mm set collar", "set screw collar 16mm", "shaft collar 16"]

100

standard = "DIN 705"

101

102

[[presets]]

103

id = "DIN705A-20"

104

title = "DIN 705 A, bore 20"

105

params = { style = "set-screw", bore = 20 }

106

aliases = ["DIN 705 20", "20mm shaft collar", "20 mm set collar", "set screw collar 20mm", "shaft collar 20"]

107

standard = "DIN 705"

108

name = "steve/shaft-collar"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Shaft collar: DIN 705 A set collar, bores 3 to 20 mm, and one-piece clamp collars."
description = """Shaft collar for positioning on a shaft: DIN 705 form A set collar with its radial set-screw hole, or a one-piece \
clamp collar's envelope. Axis along Z, centred on the origin. See the README; not affiliated with any maker."""
tags = ["shaft-collar", "collar", "din-705", "shaft", "metric", "power-transmission"]

[parameters.style]
type = "choice"
default = "set-screw"
choices = ["set-screw", "clamp"]
label = "Style"

[parameters.bore]
type = "number"
default = 8
min = 3
max = 20
unit = "mm"
label = "Bore"
description = "Set screw: 3, 4, 5, 6, 8, 10, 12, 16, 20. Clamp: 6, 8, 20."

[[presets]]
id = "clamp-6"
title = "Clamp collar, bore 6"
params = { style = "clamp", bore = 6 }
aliases = ["6mm clamp collar", "clamp collar 6 mm", "one piece shaft collar 6", "MCL-6"]
standard = "Ruland MCL"

[[presets]]
id = "clamp-8"
title = "Clamp collar, bore 8"
params = { style = "clamp", bore = 8 }
aliases = ["8mm clamp collar", "clamp collar 8 mm", "one piece shaft collar 8", "MCL-8"]
standard = "Ruland MCL"

[[presets]]
id = "clamp-20"
title = "Clamp collar, bore 20"
params = { style = "clamp", bore = 20 }
aliases = ["20mm clamp collar", "clamp collar 20 mm", "one piece shaft collar 20", "MCL-20"]
standard = "Ruland MCL"

[[presets]]
id = "DIN705A-3"
title = "DIN 705 A, bore 3"
params = { style = "set-screw", bore = 3 }
aliases = ["DIN 705 3", "3mm shaft collar", "3 mm set collar", "set screw collar 3mm", "shaft collar 3"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-4"
title = "DIN 705 A, bore 4"
params = { style = "set-screw", bore = 4 }
aliases = ["DIN 705 4", "4mm shaft collar", "4 mm set collar", "set screw collar 4mm", "shaft collar 4"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-5"
title = "DIN 705 A, bore 5"
params = { style = "set-screw", bore = 5 }
aliases = ["DIN 705 5", "5mm shaft collar", "5 mm set collar", "set screw collar 5mm", "shaft collar 5"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-6"
title = "DIN 705 A, bore 6"
params = { style = "set-screw", bore = 6 }
aliases = ["DIN 705 6", "6mm shaft collar", "6 mm set collar", "set screw collar 6mm", "shaft collar 6"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-8"
title = "DIN 705 A, bore 8"
params = { style = "set-screw", bore = 8 }
aliases = ["DIN 705 8", "8mm shaft collar", "8 mm set collar", "set screw collar 8mm", "shaft collar 8"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-10"
title = "DIN 705 A, bore 10"
params = { style = "set-screw", bore = 10 }
aliases = ["DIN 705 10", "10mm shaft collar", "10 mm set collar", "set screw collar 10mm", "shaft collar 10"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-12"
title = "DIN 705 A, bore 12"
params = { style = "set-screw", bore = 12 }
aliases = ["DIN 705 12", "12mm shaft collar", "12 mm set collar", "set screw collar 12mm", "shaft collar 12"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-16"
title = "DIN 705 A, bore 16"
params = { style = "set-screw", bore = 16 }
aliases = ["DIN 705 16", "16mm shaft collar", "16 mm set collar", "set screw collar 16mm", "shaft collar 16"]
standard = "DIN 705"

[[presets]]
id = "DIN705A-20"
title = "DIN 705 A, bore 20"
params = { style = "set-screw", bore = 20 }
aliases = ["DIN 705 20", "20mm shaft collar", "20 mm set collar", "set screw collar 20mm", "shaft collar 20"]
standard = "DIN 705"

README.md 31 lines · Markdown

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Shaft collar

A DIN 705 form A set collar, or a one-piece clamp collar's envelope. Axis along Z, centred on the origin.

Geometry

A ring of outside diameter D, bore d and width b. A set collar's radial hole runs along +X from the bore to the outside, drawn at the thread's nominal diameter. A clamp collar's slit and screw aren't modelled: the sources give the screw's size and location, not the slit.

Source

Set collars: DIN 705 form A, as tabulated by Maedler (light-duty series, set screw DIN EN ISO 4027), item pages 623003006 to 623020006 through its distributor https://eshop.ameco.cz/products/en/3/1625/g1574/623008006/:

d	3	4	5	6	8	10	12	16	20
D	7	8	10	12	16	20	22	28	32
b	5	5	6	8	8	10	12	12	14
Screw	M2 × 3	M2.5 × 3	M3 × 4	M4 × 5	M4 × 6	M5 × 8	M6 × 8	M6 × 8	M6 × 8

Clamp collars: Ruland one-piece, MCL-8-F product sheet (bore 8, OD 18, width 9), https://docs.rs-online.com/09ba/0900766b816574f5.pdf; MCL-6-F (6, 16, 9) from Zoro's listing, https://www.zoro.com/ruland-shaft-collar-clamp-1pc-6mm-steel-mcl-6-f/i/G0811474/; MCL-20-AN (20, 40, 15) from Zoro's listing, https://zoro.com/ruland-mountable-collar-1pc-clamp-bore-20mm-anod-aluminum-od-40mm-of-mcl-20-an/i/G3401906.

Clamp collars of bores 3, 4, 5, 10, 12 and 16 mm and two-piece clamp collars aren't offered: no table reachable so far gives them (the maker's site refuses automated reads). Maker names identify the source; not affiliated with any maker.

Preset list: bores of the step.parts catalogue (MIT), see library/NOTICE.md.

# Shaft collar

A DIN 705 form A set collar, or a one-piece clamp collar's envelope. Axis along Z, centred on the origin.

## Geometry

A ring of outside diameter D, bore d and width b. A set collar's radial hole runs along +X from the bore to the outside,
drawn at the thread's nominal diameter. A clamp collar's slit and screw aren't modelled: the sources give the screw's size
and location, not the slit.

## Source

- **Set collars:** DIN 705 form A, as tabulated by Maedler (light-duty series, set screw DIN EN ISO 4027), item pages
  623003006 to 623020006 through its distributor <https://eshop.ameco.cz/products/en/3/1625/g1574/623008006/>:

| d | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 16 | 20 |
|---|---|---|---|---|---|---|---|---|---|
| D | 7 | 8 | 10 | 12 | 16 | 20 | 22 | 28 | 32 |
| b | 5 | 5 | 6 | 8 | 8 | 10 | 12 | 12 | 14 |
| Screw | M2 × 3 | M2.5 × 3 | M3 × 4 | M4 × 5 | M4 × 6 | M5 × 8 | M6 × 8 | M6 × 8 | M6 × 8 |

- **Clamp collars:** Ruland one-piece, MCL-8-F product sheet (bore 8, OD 18, width 9),
  <https://docs.rs-online.com/09ba/0900766b816574f5.pdf>; MCL-6-F (6, 16, 9) from Zoro's listing,
  <https://www.zoro.com/ruland-shaft-collar-clamp-1pc-6mm-steel-mcl-6-f/i/G0811474/>; MCL-20-AN (20, 40, 15) from
  Zoro's listing, <https://zoro.com/ruland-mountable-collar-1pc-clamp-bore-20mm-anod-aluminum-od-40mm-of-mcl-20-an/i/G3401906>.

Clamp collars of bores 3, 4, 5, 10, 12 and 16 mm and two-piece clamp collars aren't offered: no table reachable so far
gives them (the maker's site refuses automated reads). Maker names identify the source; not affiliated with any maker.

Preset list: bores of the step.parts catalogue (MIT), see `library/NOTICE.md`.

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-collar/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-collar/1.0.0"

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

About this part

steve72 parts

Profile

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

Mass: 9.13 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 4, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: a05ec89e25ac…

#shaft-collar #collar #din-705 #shaft #metric #power-transmission

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Shaft collar for positioning on a shaft: DIN 705 form A set collar with its radial set-screw hole, or a one-piece clamp collar's envelope. Axis along Z, centred on the origin. See the README; not affiliated with any maker.

Shaft collar

A DIN 705 form A set collar, or a one-piece clamp collar's envelope. Axis along Z, centred on the origin.

Geometry

Source

Set collars: DIN 705 form A, as tabulated by Maedler (light-duty series, set screw DIN EN ISO 4027), item pages 623003006 to 623020006 through its distributor https://eshop.ameco.cz/products/en/3/1625/g1574/623008006/:

d	3	4	5	6	8	10	12	16	20
D	7	8	10	12	16	20	22	28	32
b	5	5	6	8	8	10	12	12	14
Screw	M2 × 3	M2.5 × 3	M3 × 4	M4 × 5	M4 × 6	M5 × 8	M6 × 8	M6 × 8	M6 × 8

Clamp collars: Ruland one-piece, MCL-8-F product sheet (bore 8, OD 18, width 9), https://docs.rs-online.com/09ba/0900766b816574f5.pdf; MCL-6-F (6, 16, 9) from Zoro's listing, https://www.zoro.com/ruland-shaft-collar-clamp-1pc-6mm-steel-mcl-6-f/i/G0811474/; MCL-20-AN (20, 40, 15) from Zoro's listing, https://zoro.com/ruland-mountable-collar-1pc-clamp-bore-20mm-anod-aluminum-od-40mm-of-mcl-20-an/i/G3401906.

Preset list: bores of the step.parts catalogue (MIT), see library/NOTICE.md.

1.0.0 Latest Nov 4, 2026 · 2 hours ago

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Shaft collar

Geometry

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Shaft collar

Geometry

Source

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