NEMA 17 stepper motor — dimension sheet
Source: Xem Studio, https://xemstudio.com/objects/nema-17-stepper/  (CC BY 4.0)
Basis: NEMA ICS 16 frame standard; common vendor values
Catalog version: 2026-10-20

Overall (mm): width 42.3, height 42.3
Mounting holes: 4 × Ø3.0 mm, pattern 31 x 31, screw M3
- Face 42.3 × 42.3 mm; four M3 holes on a 31.0 × 31.0 mm pattern; Ø22 mm pilot boss, 2 mm tall; Ø5 mm shaft with a D-flat, typically 20–24 mm long.
- Body length varies by torque (20–60 mm); the face and hole pattern don't.

Files elsewhere (not hosted by Xem Studio; license as stated by the publisher):
- Wikipedia: Stepper motor (NEMA frame sizes) — web — CC BY-SA 4.0 (text) — https://en.wikipedia.org/wiki/Stepper_motor

Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/nema-17-stepper/index.json
API: https://xemstudio.com/api/geometry?object=nema-17-stepper