steve/round-spacer

Round unthreaded clearance spacer for M3 screws (Harwin R30-601): Ø4.76 × Ø3.30, any length.

v1.0.0 Latest STEVE MIT 0

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Isometric

Parameters

Preset9 sizes

Screw size

Length L1–60 mm

Defaults built

part.py 21 lines · Python · STEVE runtime · checked

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"""Round clearance spacer (unthreaded), Harwin R30-601 (M3 clearance): a brass tube, outside diameter D, bore d, length

L, axis along +Z, one end on the XY plane, centred on the origin.

"""

from steve import Model

clearance = "M3" # Screw size

length = 10 # mm Length L

# mm. Harwin R30-601XX02 M3 circular clearance spacer (DRG-02004, issue 5): (outside Ø D, bore Ø d)

SPACERS = {"M3": (4.76, 3.30)}

D, d = SPACERS[clearance]

model = Model()

with model.sketch("spacer_sketch", on="XY", name="Spacer") as sk:

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

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

model.extrude("spacer", "spacer_sketch", distance=length, name="Spacer")

model.material("brass", color="#c6c8c4") # CW614N, nickel plated

result = model.result()

"""Round clearance spacer (unthreaded), Harwin R30-601 (M3 clearance): a brass tube, outside diameter D, bore d, length
L, axis along +Z, one end on the XY plane, centred on the origin.
"""
from steve import Model

clearance = "M3"  # Screw size
length = 10  # mm Length L

# mm. Harwin R30-601XX02 M3 circular clearance spacer (DRG-02004, issue 5): (outside Ø D, bore Ø d)
SPACERS = {"M3": (4.76, 3.30)}

D, d = SPACERS[clearance]

model = Model()
with model.sketch("spacer_sketch", on="XY", name="Spacer") as sk:
    sk.circle("outside", (0, 0), D / 2)
    sk.circle("bore", (0, 0), d / 2)
model.extrude("spacer", "spacer_sketch", distance=length, name="Spacer")
model.material("brass", color="#c6c8c4")   # CW614N, nickel plated
result = model.result()

pypart.toml 88 lines · TOML

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name = "steve/round-spacer"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Round unthreaded clearance spacer for M3 screws (Harwin R30-601): Ø4.76 × Ø3.30, any length."

description = """Circular clearance spacer for M3 screws, Harwin R30-601 (brass, nickel plated): a tube of outside \

diameter 4.76 mm and bore 3.30 mm; the length is a parameter (Harwin sells 2 to 30 mm).

Axis along +Z, one end on the XY plane, centred on the origin. Dimensions: see the README."""

tags = ["spacer", "round-spacer", "clearance-spacer", "pcb", "electronics", "harwin", "metric"]

[parameters.clearance]

type = "choice"

default = "M3"

choices = ["M3"]

label = "Screw size"

[parameters.length]

type = "number"

default = 10

min = 1

max = 60

unit = "mm"

label = "Length L"

[[presets]]

id = "M3-5"

title = "Round spacer M3 × 5 mm (Harwin R30-6010502)"

params = { clearance = "M3", length = 5 }

aliases = ["Harwin R30-6010502", "M3 round spacer 5 mm", "M3 clearance spacer 5mm", "unthreaded spacer M3 x 5"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-6"

title = "Round spacer M3 × 6 mm (Harwin R30-6010602)"

params = { clearance = "M3", length = 6 }

aliases = ["Harwin R30-6010602", "M3 round spacer 6 mm", "M3 clearance spacer 6mm", "unthreaded spacer M3 x 6"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-8"

title = "Round spacer M3 × 8 mm (Harwin R30-6010802)"

params = { clearance = "M3", length = 8 }

aliases = ["Harwin R30-6010802", "M3 round spacer 8 mm", "M3 clearance spacer 8mm", "unthreaded spacer M3 x 8"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-10"

title = "Round spacer M3 × 10 mm (Harwin R30-6011002)"

params = { clearance = "M3", length = 10 }

aliases = ["Harwin R30-6011002", "M3 round spacer 10 mm", "M3 clearance spacer 10mm", "unthreaded spacer M3 x 10"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-12"

title = "Round spacer M3 × 12 mm (Harwin R30-6011202)"

params = { clearance = "M3", length = 12 }

aliases = ["Harwin R30-6011202", "M3 round spacer 12 mm", "M3 clearance spacer 12mm", "unthreaded spacer M3 x 12"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-15"

title = "Round spacer M3 × 15 mm (Harwin R30-6011502)"

params = { clearance = "M3", length = 15 }

aliases = ["Harwin R30-6011502", "M3 round spacer 15 mm", "M3 clearance spacer 15mm", "unthreaded spacer M3 x 15"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-20"

title = "Round spacer M3 × 20 mm (Harwin R30-6012002)"

params = { clearance = "M3", length = 20 }

aliases = ["Harwin R30-6012002", "M3 round spacer 20 mm", "M3 clearance spacer 20mm", "unthreaded spacer M3 x 20"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-25"

title = "Round spacer M3 × 25 mm (Harwin R30-6012502)"

params = { clearance = "M3", length = 25 }

aliases = ["Harwin R30-6012502", "M3 round spacer 25 mm", "M3 clearance spacer 25mm", "unthreaded spacer M3 x 25"]

standard = "Harwin R30-601"

[[presets]]

id = "M3-30"

title = "Round spacer M3 × 30 mm (Harwin R30-6013002)"

params = { clearance = "M3", length = 30 }

aliases = ["Harwin R30-6013002", "M3 round spacer 30 mm", "M3 clearance spacer 30mm", "unthreaded spacer M3 x 30"]

standard = "Harwin R30-601"

name = "steve/round-spacer"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Round unthreaded clearance spacer for M3 screws (Harwin R30-601): Ø4.76 × Ø3.30, any length."
description = """Circular clearance spacer for M3 screws, Harwin R30-601 (brass, nickel plated): a tube of outside \
diameter 4.76 mm and bore 3.30 mm; the length is a parameter (Harwin sells 2 to 30 mm).

Axis along +Z, one end on the XY plane, centred on the origin. Dimensions: see the README."""
tags = ["spacer", "round-spacer", "clearance-spacer", "pcb", "electronics", "harwin", "metric"]

[parameters.clearance]
type = "choice"
default = "M3"
choices = ["M3"]
label = "Screw size"

[parameters.length]
type = "number"
default = 10
min = 1
max = 60
unit = "mm"
label = "Length L"

[[presets]]
id = "M3-5"
title = "Round spacer M3 × 5 mm (Harwin R30-6010502)"
params = { clearance = "M3", length = 5 }
aliases = ["Harwin R30-6010502", "M3 round spacer 5 mm", "M3 clearance spacer 5mm", "unthreaded spacer M3 x 5"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-6"
title = "Round spacer M3 × 6 mm (Harwin R30-6010602)"
params = { clearance = "M3", length = 6 }
aliases = ["Harwin R30-6010602", "M3 round spacer 6 mm", "M3 clearance spacer 6mm", "unthreaded spacer M3 x 6"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-8"
title = "Round spacer M3 × 8 mm (Harwin R30-6010802)"
params = { clearance = "M3", length = 8 }
aliases = ["Harwin R30-6010802", "M3 round spacer 8 mm", "M3 clearance spacer 8mm", "unthreaded spacer M3 x 8"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-10"
title = "Round spacer M3 × 10 mm (Harwin R30-6011002)"
params = { clearance = "M3", length = 10 }
aliases = ["Harwin R30-6011002", "M3 round spacer 10 mm", "M3 clearance spacer 10mm", "unthreaded spacer M3 x 10"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-12"
title = "Round spacer M3 × 12 mm (Harwin R30-6011202)"
params = { clearance = "M3", length = 12 }
aliases = ["Harwin R30-6011202", "M3 round spacer 12 mm", "M3 clearance spacer 12mm", "unthreaded spacer M3 x 12"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-15"
title = "Round spacer M3 × 15 mm (Harwin R30-6011502)"
params = { clearance = "M3", length = 15 }
aliases = ["Harwin R30-6011502", "M3 round spacer 15 mm", "M3 clearance spacer 15mm", "unthreaded spacer M3 x 15"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-20"
title = "Round spacer M3 × 20 mm (Harwin R30-6012002)"
params = { clearance = "M3", length = 20 }
aliases = ["Harwin R30-6012002", "M3 round spacer 20 mm", "M3 clearance spacer 20mm", "unthreaded spacer M3 x 20"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-25"
title = "Round spacer M3 × 25 mm (Harwin R30-6012502)"
params = { clearance = "M3", length = 25 }
aliases = ["Harwin R30-6012502", "M3 round spacer 25 mm", "M3 clearance spacer 25mm", "unthreaded spacer M3 x 25"]
standard = "Harwin R30-601"

[[presets]]
id = "M3-30"
title = "Round spacer M3 × 30 mm (Harwin R30-6013002)"
params = { clearance = "M3", length = 30 }
aliases = ["Harwin R30-6013002", "M3 round spacer 30 mm", "M3 clearance spacer 30mm", "unthreaded spacer M3 x 30"]
standard = "Harwin R30-601"

README.md 30 lines · Markdown

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Round clearance spacer (Harwin R30-601, M3)

Unthreaded round spacer for M3 screws at any length. Presets cover the catalogue's M3 clearance spacers at the lengths Harwin sells.

Geometry

A tube, outside diameter D 4.76, bore d 3.30, length L, axis along +Z, one end on the XY plane, centred on the origin. Chamfers are not modelled.

Parameters

Parameter	Meaning
`clearance`	Screw size: M3
`length`	Length L, mm

Source

Harwin, customer information sheet R30-601XX02 "M3 circular clearance spacer" (drawing DRG-02004, issue 5, 15.10.06), brass CW614N, nickel finish; Ø4.76, Ø3.30; L ± 0.10 up to 12 mm, ± 0.15 over; lengths 2–16, 18, 20, 22, 25, 30 (the technical drawing PDF on Harwin's content server, content.harwin.com, linked from the R30-601 series page on https://www.harwin.com).

Not covered: clearance spacers for M2, M2.5 and M4, and M3 spacers longer than 30 mm: no maker table with their dimensions was found (an Ettinger Ø2.6/4.5 spacer appeared only in a search snippet; Würth WA-SBRRO's product page does not say whether its bore is plain and no datasheet was read).

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

# Round clearance spacer (Harwin R30-601, M3)

Unthreaded round spacer for M3 screws at any length. Presets cover the catalogue's M3 clearance spacers at the lengths
Harwin sells.

## Geometry

A tube, outside diameter **D** 4.76, bore **d** 3.30, length **L**, axis along +Z, one end on the XY plane, centred
on the origin. Chamfers are not modelled.

## Parameters

| Parameter | Meaning |
|---|---|
| `clearance` | Screw size: M3 |
| `length` | Length L, mm |

## Source

Harwin, customer information sheet R30-601XX02 "M3 circular clearance spacer" (drawing DRG-02004, issue 5,
15.10.06), brass CW614N, nickel finish; Ø4.76, Ø3.30; L ± 0.10 up to 12 mm, ± 0.15 over; lengths 2–16, 18, 20, 22,
25, 30 (the technical drawing PDF on Harwin's content server, content.harwin.com, linked from the R30-601 series
page on https://www.harwin.com).

Not covered: clearance spacers for M2, M2.5 and M4, and M3 spacers longer than 30 mm: no maker table with their
dimensions was found (an Ettinger Ø2.6/4.5 spacer appeared only in a search snippet; Würth WA-SBRRO's product page
does not say whether its bore is plain and no datasheet was read).

Preset list: sizes 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/round-spacer/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/round-spacer/1.0.0"

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

About this part

steve58 parts

Profile

Brass (generic)Copper alloys · Custom finish · 8.6 g/cm³

Mass: 0.79 g

At the parameters shown in the viewer.

License: MIT

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

Runtime: STEVE
Built with: CadQuery 2.9.0.dev0
Published: Nov 1, 2026
Downloads: 0
Builds: 0
Stars: 0
Bundle: 3d5399e90aed…

#spacer #round-spacer #clearance-spacer #pcb #electronics #harwin #metric

Checks

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Circular clearance spacer for M3 screws, Harwin R30-601 (brass, nickel plated): a tube of outside diameter 4.76 mm and bore 3.30 mm; the length is a parameter (Harwin sells 2 to 30 mm). Axis along +Z, one end on the XY plane, centred on the origin. Dimensions: see the README.

Round clearance spacer (Harwin R30-601, M3)

Unthreaded round spacer for M3 screws at any length. Presets cover the catalogue's M3 clearance spacers at the lengths Harwin sells.

Geometry

A tube, outside diameter D 4.76, bore d 3.30, length L, axis along +Z, one end on the XY plane, centred on the origin. Chamfers are not modelled.

Parameters

Parameter	Meaning
`clearance`	Screw size: M3
`length`	Length L, mm

Source

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

1.0.0 Latest Nov 1, 2026 · 1 day ago

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steve/round-spacer

Round clearance spacer (Harwin R30-601, M3)

Geometry

Parameters

Source

Round clearance spacer (Harwin R30-601, M3)

Geometry

Parameters

Source

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