Ball bearings

⚙️ Spec sheet →  —  visual schematic and metrics measured from a real rendered STL.

Pure-Python port of BOSL2’s ball_bearings.scad: models of standard ball-bearing cartridges. ball_bearing() builds one from a trade-size name or explicit dimensions; ball_bearing_info() returns the tabulated dimensions as a BearingSpec. .. autoclass:: bosl2.ball_bearings.BearingSpec

members:

class bosl2.ball_bearings.BallBearings[source]

Bases: object

Standard ball-bearing cartridge models (BOSL2 ball_bearings.scad).

static ball_bearing_info(trade_size)[source]

The BearingSpec for a standard trade size, e.g. "608" / "6902ZZ" / "R8".

Parameters:

trade_size (str)

Return type:

BearingSpec

static ball_bearing(trade_size=None, inner_diameter=None, outer_diameter=None, width=None, shield=True, color='silver', fn=None, fa=None, fs=None)[source]

A ball-bearing cartridge model (BOSL2 ball_bearing()).

Give a trade_size name, or explicit inner_diameter/outer_diameter/width (with shield). Returns a Bosl2Solid centered on the origin.

Examples

A common 608 skate bearing:

from bosl2.ball_bearings import BallBearings
BallBearings.ball_bearing("608").show()

⬇ Download STL mesh

Parameters:

  • trade_size (str | None)

  • inner_diameter (float | None)

  • outer_diameter (float | None)

  • width (float | None)

  • shield (bool)

  • color (str | None)

  • fn (int | None)

  • fa (float | None)

  • fs (float | None)

Return type:

Bosl2Solid

Examples

These mirror the examples in BOSL2’s ball_bearings.scad, rendered live through PythonSCAD. Examples that rely on BOSL2’s attachment/anchor system, or on features not in this port, are omitted.

ball_bearing

A 608 skate bearing:

BallBearings.ball_bearing("608").show()

⬇ Download STL mesh

A shielded 608ZZ:

BallBearings.ball_bearing("608ZZ").show()

⬇ Download STL mesh

An R8 imperial bearing:

BallBearings.ball_bearing("R8").show()

⬇ Download STL mesh

A custom open bearing by dimensions:

BallBearings.ball_bearing(inner_diameter=12, outer_diameter=32, width=10, shield=False).show()

⬇ Download STL mesh