Printed pin gauges 2.8–3.2 and 4.8–5.2 mm — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/pin-gauges/  (CC BY 4.0)
Basis: Pins stepped around Ø3 and Ø5 in 0.1 mm steps, tested in the bore of a 623 (Ø3) or 625 (Ø5) bearing
Catalog version: 2026-10-20

Sizes: see table below
- Every file on this site is drawn at exact size with no printing allowance; this gauge steps through sizes around the nominal so you can measure the allowance your process needs for one fit class, then apply it only to the features each object lists under Mating features.
- Each gauge is a 66 × 16 × 3 mm base with five pins 12 mm tall, 0.3 mm chamfered tips: Ø2.8, 2.9, 3.0, 3.1, 3.2 or Ø4.8, 4.9, 5.0, 5.1, 5.2.
- Try each pin in the bore of a 623 (Ø3) or 625 (Ø5) bearing: the pin that enters finger-tight, minus 3.0 or 5.0, is the allowance for printed pins and spigots (usually negative).

gauge  pins_mm  test_in
pin-gauge-2-8-to-3-2  2.8 / 2.9 / 3.0 / 3.1 / 3.2  623 bore Ø3
pin-gauge-4-8-to-5-2  4.8 / 4.9 / 5.0 / 5.1 / 5.2  625 bore Ø5

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Engineering tolerance — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Engineering_tolerance
- Prusa: Knowledge base: XY size compensation — web — Prusa KB [verify license at link] — https://help.prusa3d.com/article/xy-size-compensation_125045
- Long Earth Society: Engine and rig builds — web, video — LES site — https://longearthsociety.com/engineering/

Free files (CC BY 4.0, Xem Studio; STEP + STL, 2 parts): https://xemstudio.com/files/hardware/pin-gauges/index.json
API: https://xemstudio.com/api/geometry?object=pin-gauges