steve/cylindrical-roller-bearing

Cylindrical roller bearing, NU2 and NU3 series, bore 10 to 50 mm, as a boundary-dimension envelope.

v1.0.0 STEVE MIT 0

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Parameters

Preset14 sizes

Bearing number14 options

Defaults built

part.py 18 lines · Python · STEVE runtime · checked

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"""Cylindrical roller bearing, NU2 and NU3 series, bore up to 50 mm: envelope for assemblies, one solid with the boundary dimensions bore d, outside

diameter D and width B. Rolling elements, cage and the gaps between the rings are not modelled. Axis along Z, centred on the origin."""

from steve import Model

designation = "NU208" # Bearing number

# number: (d, D, B). NTN Ball and Roller Bearings CAT. No. 2203-3/E (2024), pp. B-71 to B-72 (PDF pages 147 and 148), boundary dimensions.

BEARINGS = {"NU204": (20, 47, 14), "NU205": (25, 52, 15), "NU206": (30, 62, 16), "NU207": (35, 72, 17), "NU208": (40, 80, 18), "NU209": (45, 85, 19), "NU210": (50, 90, 20), "NU304": (20, 52, 15), "NU305": (25, 62, 17), "NU306": (30, 72, 19), "NU307": (35, 80, 21), "NU308": (40, 90, 23), "NU309": (45, 100, 25), "NU310": (50, 110, 27)}

d, D, width = BEARINGS[designation]

model = Model()

with model.sketch("rings", on="XY", name="Rings") as sk:

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

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

model.extrude("body", "rings", distance=width, both=True, name="Bearing")

model.material("steel-generic", color="#b9bdc2")

result = model.result()

"""Cylindrical roller bearing, NU2 and NU3 series, bore up to 50 mm: envelope for assemblies, one solid with the boundary dimensions bore d, outside
diameter D and width B. Rolling elements, cage and the gaps between the rings are not modelled. Axis along Z, centred on the origin."""
from steve import Model

designation = "NU208"  # Bearing number

# number: (d, D, B). NTN Ball and Roller Bearings CAT. No. 2203-3/E (2024), pp. B-71 to B-72 (PDF pages 147 and 148), boundary dimensions.
BEARINGS = {"NU204": (20, 47, 14), "NU205": (25, 52, 15), "NU206": (30, 62, 16), "NU207": (35, 72, 17), "NU208": (40, 80, 18), "NU209": (45, 85, 19), "NU210": (50, 90, 20), "NU304": (20, 52, 15), "NU305": (25, 62, 17), "NU306": (30, 72, 19), "NU307": (35, 80, 21), "NU308": (40, 90, 23), "NU309": (45, 100, 25), "NU310": (50, 110, 27)}

d, D, width = BEARINGS[designation]
model = Model()
with model.sketch("rings", on="XY", name="Rings") as sk:
    sk.circle("outer", (0, 0), D / 2)
    sk.circle("bore", (0, 0), d / 2)
model.extrude("body", "rings", distance=width, both=True, name="Bearing")
model.material("steel-generic", color="#b9bdc2")
result = model.result()

pypart.toml 113 lines · TOML

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name = "steve/cylindrical-roller-bearing"

version = "1.0.0"

runtime = "steve"

license = "MIT"

summary = "Cylindrical roller bearing, NU2 and NU3 series, bore 10 to 50 mm, as a boundary-dimension envelope."

description = """Cylindrical roller bearing (NU2 and NU3 series) as an envelope for assemblies: one solid with the boundary dimensions. Rolling elements, cage and \

the gaps between the rings are not modelled. Axis along Z, centred on the origin. Dimensions from a maker's public catalogue (see the README); not affiliated with any maker."""

tags = ["bearing", "roller-bearing", "cylindrical-roller", "iso-15", "metric"]

[parameters.designation]

type = "choice"

default = "NU208"

choices = ["NU204", "NU205", "NU206", "NU207", "NU208", "NU209", "NU210", "NU304", "NU305", "NU306", "NU307", "NU308", "NU309", "NU310"]

label = "Bearing number"

[[presets]]

id = "NU204"

title = "NU204 (20 × 47 × 14)"

params = { designation = "NU204" }

aliases = ["NU204 bearing", "cylindrical roller bearing NU204", "20x47x14 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU205"

title = "NU205 (25 × 52 × 15)"

params = { designation = "NU205" }

aliases = ["NU205 bearing", "cylindrical roller bearing NU205", "25x52x15 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU206"

title = "NU206 (30 × 62 × 16)"

params = { designation = "NU206" }

aliases = ["NU206 bearing", "cylindrical roller bearing NU206", "30x62x16 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU207"

title = "NU207 (35 × 72 × 17)"

params = { designation = "NU207" }

aliases = ["NU207 bearing", "cylindrical roller bearing NU207", "35x72x17 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU208"

title = "NU208 (40 × 80 × 18)"

params = { designation = "NU208" }

aliases = ["NU208 bearing", "cylindrical roller bearing NU208", "40x80x18 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU209"

title = "NU209 (45 × 85 × 19)"

params = { designation = "NU209" }

aliases = ["NU209 bearing", "cylindrical roller bearing NU209", "45x85x19 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU210"

title = "NU210 (50 × 90 × 20)"

params = { designation = "NU210" }

aliases = ["NU210 bearing", "cylindrical roller bearing NU210", "50x90x20 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU304"

title = "NU304 (20 × 52 × 15)"

params = { designation = "NU304" }

aliases = ["NU304 bearing", "cylindrical roller bearing NU304", "20x52x15 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU305"

title = "NU305 (25 × 62 × 17)"

params = { designation = "NU305" }

aliases = ["NU305 bearing", "cylindrical roller bearing NU305", "25x62x17 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU306"

title = "NU306 (30 × 72 × 19)"

params = { designation = "NU306" }

aliases = ["NU306 bearing", "cylindrical roller bearing NU306", "30x72x19 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU307"

title = "NU307 (35 × 80 × 21)"

params = { designation = "NU307" }

aliases = ["NU307 bearing", "cylindrical roller bearing NU307", "35x80x21 roller-bearing"]

standard = "ISO 15"

[[presets]]

id = "NU308"

title = "NU308 (40 × 90 × 23)"

params = { designation = "NU308" }

aliases = ["NU308 bearing", "cylindrical roller bearing NU308", "40x90x23 roller-bearing"]

standard = "ISO 15"

100

[[presets]]

101

id = "NU309"

102

title = "NU309 (45 × 100 × 25)"

103

params = { designation = "NU309" }

104

aliases = ["NU309 bearing", "cylindrical roller bearing NU309", "45x100x25 roller-bearing"]

105

standard = "ISO 15"

106

107

[[presets]]

108

id = "NU310"

109

title = "NU310 (50 × 110 × 27)"

110

params = { designation = "NU310" }

111

aliases = ["NU310 bearing", "cylindrical roller bearing NU310", "50x110x27 roller-bearing"]

112

standard = "ISO 15"

113

name = "steve/cylindrical-roller-bearing"
version = "1.0.0"
runtime = "steve"
license = "MIT"
summary = "Cylindrical roller bearing, NU2 and NU3 series, bore 10 to 50 mm, as a boundary-dimension envelope."
description = """Cylindrical roller bearing (NU2 and NU3 series) as an envelope for assemblies: one solid with the boundary dimensions. Rolling elements, cage and \
the gaps between the rings are not modelled. Axis along Z, centred on the origin. Dimensions from a maker's public catalogue (see the README); not affiliated with any maker."""
tags = ["bearing", "roller-bearing", "cylindrical-roller", "iso-15", "metric"]

[parameters.designation]
type = "choice"
default = "NU208"
choices = ["NU204", "NU205", "NU206", "NU207", "NU208", "NU209", "NU210", "NU304", "NU305", "NU306", "NU307", "NU308", "NU309", "NU310"]
label = "Bearing number"

[[presets]]
id = "NU204"
title = "NU204 (20 × 47 × 14)"
params = { designation = "NU204" }
aliases = ["NU204 bearing", "cylindrical roller bearing NU204", "20x47x14 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU205"
title = "NU205 (25 × 52 × 15)"
params = { designation = "NU205" }
aliases = ["NU205 bearing", "cylindrical roller bearing NU205", "25x52x15 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU206"
title = "NU206 (30 × 62 × 16)"
params = { designation = "NU206" }
aliases = ["NU206 bearing", "cylindrical roller bearing NU206", "30x62x16 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU207"
title = "NU207 (35 × 72 × 17)"
params = { designation = "NU207" }
aliases = ["NU207 bearing", "cylindrical roller bearing NU207", "35x72x17 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU208"
title = "NU208 (40 × 80 × 18)"
params = { designation = "NU208" }
aliases = ["NU208 bearing", "cylindrical roller bearing NU208", "40x80x18 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU209"
title = "NU209 (45 × 85 × 19)"
params = { designation = "NU209" }
aliases = ["NU209 bearing", "cylindrical roller bearing NU209", "45x85x19 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU210"
title = "NU210 (50 × 90 × 20)"
params = { designation = "NU210" }
aliases = ["NU210 bearing", "cylindrical roller bearing NU210", "50x90x20 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU304"
title = "NU304 (20 × 52 × 15)"
params = { designation = "NU304" }
aliases = ["NU304 bearing", "cylindrical roller bearing NU304", "20x52x15 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU305"
title = "NU305 (25 × 62 × 17)"
params = { designation = "NU305" }
aliases = ["NU305 bearing", "cylindrical roller bearing NU305", "25x62x17 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU306"
title = "NU306 (30 × 72 × 19)"
params = { designation = "NU306" }
aliases = ["NU306 bearing", "cylindrical roller bearing NU306", "30x72x19 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU307"
title = "NU307 (35 × 80 × 21)"
params = { designation = "NU307" }
aliases = ["NU307 bearing", "cylindrical roller bearing NU307", "35x80x21 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU308"
title = "NU308 (40 × 90 × 23)"
params = { designation = "NU308" }
aliases = ["NU308 bearing", "cylindrical roller bearing NU308", "40x90x23 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU309"
title = "NU309 (45 × 100 × 25)"
params = { designation = "NU309" }
aliases = ["NU309 bearing", "cylindrical roller bearing NU309", "45x100x25 roller-bearing"]
standard = "ISO 15"

[[presets]]
id = "NU310"
title = "NU310 (50 × 110 × 27)"
params = { designation = "NU310" }
aliases = ["NU310 bearing", "cylindrical roller bearing NU310", "50x110x27 roller-bearing"]
standard = "ISO 15"

README.md 28 lines · Markdown

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Cylindrical roller bearing

Nu2 and nu3 series, bore 10 to 50 mm, as an envelope for assemblies: one solid with the boundary dimensions. Axis along Z, centred on the origin. Rolling elements, cage and the gaps between the rings aren't modelled.

Source

NTN, Ball and Roller Bearings, CAT. No. 2203-3/E (2024), https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf, pp. B-71 to B-72 (PDF pages 147 and 148). ISO 15 sets the boundary dimensions of these series.

Number	d	D	B
NU204	20	47	14
NU205	25	52	15
NU206	30	62	16
NU207	35	72	17
NU208	40	80	18
NU209	45	85	19
NU210	50	90	20
NU304	20	52	15
NU305	25	62	17
NU306	30	72	19
NU307	35	80	21
NU308	40	90	23
NU309	45	100	25
NU310	50	110	27

No tolerance class is stated here yet. Maker names identify the source; this part isn't made by or affiliated with any maker.

# Cylindrical roller bearing

Nu2 and nu3 series, bore 10 to 50 mm, as an envelope for assemblies: one solid with the boundary dimensions. Axis along Z,
centred on the origin. Rolling elements, cage and the gaps between the rings aren't modelled.

## Source

NTN, *Ball and Roller Bearings*, CAT. No. 2203-3/E (2024), <https://www.ntnglobal.com/en/products/catalog/pdf/2203E.pdf>, pp. B-71 to B-72 (PDF pages 147 and 148). ISO 15 sets the boundary dimensions of these series.

| Number | d | D | B |
|---|---|---|---|
| NU204 | 20 | 47 | 14 |
| NU205 | 25 | 52 | 15 |
| NU206 | 30 | 62 | 16 |
| NU207 | 35 | 72 | 17 |
| NU208 | 40 | 80 | 18 |
| NU209 | 45 | 85 | 19 |
| NU210 | 50 | 90 | 20 |
| NU304 | 20 | 52 | 15 |
| NU305 | 25 | 62 | 17 |
| NU306 | 30 | 72 | 19 |
| NU307 | 35 | 80 | 21 |
| NU308 | 40 | 90 | 23 |
| NU309 | 45 | 100 | 25 |
| NU310 | 50 | 110 | 27 |

No tolerance class is stated here yet. Maker names identify the source; this part isn't made by or affiliated with any maker.

Use this part

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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/cylindrical-roller-bearing/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/cylindrical-roller-bearing/1.0.0"

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

About this part

steve73 parts

Profile

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

Mass: 536 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: 08545db2fd25…

#bearing #roller-bearing #cylindrical-roller #iso-15 #metric

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Cylindrical roller bearing (NU2 and NU3 series) as an envelope for assemblies: one solid with the boundary dimensions. Rolling elements, cage and the gaps between the rings are not modelled. Axis along Z, centred on the origin. Dimensions from a maker's public catalogue (see the README); not affiliated with any maker.

Cylindrical roller bearing

Source

Number	d	D	B
NU204	20	47	14
NU205	25	52	15
NU206	30	62	16
NU207	35	72	17
NU208	40	80	18
NU209	45	85	19
NU210	50	90	20
NU304	20	52	15
NU305	25	62	17
NU306	30	72	19
NU307	35	80	21
NU308	40	90	23
NU309	45	100	25
NU310	50	110	27

No tolerance class is stated here yet. Maker names identify the source; this part isn't made by or affiliated with any maker.

1.1.0 Latest Nov 5, 2026 · 2 hours ago Compare with 1.0.0

Looks like a bearing: rings and rolling elements. detail = simple keeps one solid ring.

Requirements since 1.0.0: 4 added

added19638148tolerance_classNote: ISO 492 normal tolerance class
added29309899width? 0/−0.120
added42771306bore? 0/−0.010 (SD) (ACS)
added64593396outside_diameter⌀47 0/−0.011 (SD) (ACS)
1.0.0 Nov 4, 2026 · 3 hours ago

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