steve/t-slot-extrusion

T-slot aluminium extrusion, 2020 / 3030 / 4040, simplified profile, any length.

v1.1.0 STEVE MIT Yanked 1

Open in STEVE

This version was yanked: Superseded by pythonparts/t-slot-extrusion and pythonparts/v-slot-extrusion: the real measured profiles, not a simplified one.. It stays downloadable at this link but is hidden from search and “latest”. See the latest version (2.0.0).

Isometric

Parameters

Series

202030304040

Length10–3000 mm

Defaults built

part.py 32 lines · Python · STEVE runtime · checked

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"""Aluminium T-slot extrusion, metric series. Simplified profile: square section with a rectangular slot on each

side and a centre bore. Slot shapes differ between makers: check your supplier's drawing for exact fits.

The profile is centred on the origin in XY and extruded along +Z.

Material: aluminium, clear anodized (6061-T6 from the material library; T-slot profiles are usually 6063-T5/T6, whose density and look are the same)."""

from steve import Model

series = "2020" # Profile series

length = 100 # mm Length

# series: (side a, slot opening w, slot depth t, centre bore b)

SERIES = {

'2020': (20.0, 6.2, 6.0, 4.2),

'3030': (30.0, 8.2, 9.0, 6.8),

'4040': (40.0, 8.2, 12.0, 6.8),

}

a, w, t, b = SERIES[series]

h = a / 2

model = Model()

with model.sketch("profile", on="XY", name="Section") as sk:

sk.polyline("outline", [

(-h, -h), (-w / 2, -h), (-w / 2, -h + t), (w / 2, -h + t), (w / 2, -h),

(h, -h), (h, -w / 2), (h - t, -w / 2), (h - t, w / 2), (h, w / 2),

(h, h), (w / 2, h), (w / 2, h - t), (-w / 2, h - t), (-w / 2, h),

(-h, h), (-h, w / 2), (-h + t, w / 2), (-h + t, -w / 2), (-h, -w / 2),

])

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

model.extrude("bar", "profile", distance=length)

model.material("aluminum-6061-t6", finish="anodized") # clear anodized aluminium

result = model.result()

"""Aluminium T-slot extrusion, metric series. Simplified profile: square section with a rectangular slot on each
side and a centre bore. Slot shapes differ between makers: check your supplier's drawing for exact fits.
The profile is centred on the origin in XY and extruded along +Z.

Material: aluminium, clear anodized (6061-T6 from the material library; T-slot profiles are usually 6063-T5/T6, whose density and look are the same)."""
from steve import Model

series = "2020"  # Profile series
length = 100  # mm Length

# series: (side a, slot opening w, slot depth t, centre bore b)
SERIES = {
    '2020': (20.0, 6.2, 6.0, 4.2),
    '3030': (30.0, 8.2, 9.0, 6.8),
    '4040': (40.0, 8.2, 12.0, 6.8),
}
a, w, t, b = SERIES[series]
h = a / 2

model = Model()
with model.sketch("profile", on="XY", name="Section") as sk:
    sk.polyline("outline", [
        (-h, -h), (-w / 2, -h), (-w / 2, -h + t), (w / 2, -h + t), (w / 2, -h),
        (h, -h), (h, -w / 2), (h - t, -w / 2), (h - t, w / 2), (h, w / 2),
        (h, h), (w / 2, h), (w / 2, h - t), (-w / 2, h - t), (-w / 2, h),
        (-h, h), (-h, w / 2), (-h + t, w / 2), (-h + t, -w / 2), (-h, -w / 2),
    ])
    sk.circle("bore", (0, 0), b / 2)
model.extrude("bar", "profile", distance=length)
model.material("aluminum-6061-t6", finish="anodized")  # clear anodized aluminium
result = model.result()

pypart.toml 24 lines · TOML

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name = "steve/t-slot-extrusion"

version = "1.1.0"

runtime = "steve"

license = "MIT"

summary = "T-slot aluminium extrusion, 2020 / 3030 / 4040, simplified profile, any length."

description = "Aluminium T-slot extrusion, metric series. Simplified profile: square section with a rectangular slot on each\nside and a centre bore. Slot shapes differ between makers: check your supplier's drawing for exact fits.\nThe profile is centred on the origin in XY and extruded along +Z.\n\nMaterial: aluminium, clear anodized (6061-T6 from the material library; T-slot profiles are usually 6063-T5/T6, whose density and look are the same).\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."

tags = ["extrusion", "t-slot", "frame", "aluminium"]

changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."

[parameters.series]

type = "choice"

default = "2020"

choices = ["2020", "3030", "4040"]

label = "Series"

[parameters.length]

type = "number"

default = 100

min = 10

max = 3000

step = 1

unit = "mm"

label = "Length"

name = "steve/t-slot-extrusion"
version = "1.1.0"
runtime = "steve"
license = "MIT"
summary = "T-slot aluminium extrusion, 2020 / 3030 / 4040, simplified profile, any length."
description = "Aluminium T-slot extrusion, metric series. Simplified profile: square section with a rectangular slot on each\nside and a centre bore. Slot shapes differ between makers: check your supplier's drawing for exact fits.\nThe profile is centred on the origin in XY and extruded along +Z.\n\nMaterial: aluminium, clear anodized (6061-T6 from the material library; T-slot profiles are usually 6063-T5/T6, whose density and look are the same).\n\nDimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread."
tags = ["extrusion", "t-slot", "frame", "aluminium"]
changes = "Materials and finishes: each part is made of its standard's engineering material, with its usual finish."

[parameters.series]
type = "choice"
default = "2020"
choices = ["2020", "3030", "4040"]
label = "Series"

[parameters.length]
type = "number"
default = 100
min = 10
max = 3000
step = 1
unit = "mm"
label = "Length"

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/t-slot-extrusion/v/1.1.0/raw/part.py"

Raw files, bundle and API

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

curl "https://pythonparts.org/api/v1/parts/steve/t-slot-extrusion/1.1.0"

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

About this part

steve58 parts

Profile

Aluminum 6061-T6Aluminum alloys · Anodized · 2.7 g/cm³

Mass: 64.1 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: 1
Builds: 1
Stars: 0
Bundle: e0d6ffec4190…

#extrusion #t-slot #frame #aluminium

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PassedImports: steve

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Aluminium T-slot extrusion, metric series. Simplified profile: square section with a rectangular slot on each side and a centre bore. Slot shapes differ between makers: check your supplier's drawing for exact fits. The profile is centred on the origin in XY and extruded along +Z. Material: aluminium, clear anodized (6061-T6 from the material library; T-slot profiles are usually 6063-T5/T6, whose density and look are the same). Dimensions from STEVE's standard-part tables (nominal values of the standard). Envelope geometry: no modelled thread.

2.0.0 Latest Nov 1, 2026 · 1 day ago Compare with 1.1.0
1.1.0 Yanked Nov 1, 2026 · 2 days ago Compare with 1.0.0

Materials and finishes: each part is made of its standard's engineering material, with its usual finish.
1.0.0 Yanked Oct 31, 2026 · 2 days ago

Yanked: Superseded by pythonparts/t-slot-extrusion and pythonparts/v-slot-extrusion: the real measured profiles, not a simplified one.

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