# NEMA 23 Bipolar Stepper 3.0 N·m 4.2 A 113 mm (23HS45-4204S)

![NEMA 23 Bipolar Stepper 3.0 N·m 4.2 A 113 mm (23HS45-4204S)](https://parts.trymaglev.com/img/mo-stepperonline-23hs45-4204s.webp)

High-torque 57 mm NEMA 23 hybrid stepper with 10 mm shaft; a cheap workhorse for CNC routers and heavier linear axes.

- Maglev ID: mo-stepperonline-23hs45-4204s
- Brand: StepperOnline
- MPN: 23HS45-4204S
- Category: motors / Stepper & Integrated Stepper Motors
- Origin: CN (maker HQ, factory not confirmed)
- Maker: StepperOnline (OMC Corporation) (brand, CN)
- NDAA: unknown · Blue UAS: unknown · FCC: n/a
- HTS: 8501.10.40.40 (typical)
- MOQ: 1 · Lead time: unknown
- Confidence: REPORTED

## Price
- 1+: $28.70 (reported, 2026-10-29, https://www.omc-stepperonline.com/nema-23-bipolar-3nm-425oz-in-4-2a-57x57x114mm-4-wires-stepper-motor-cnc.html)
- 10+: $26.12 (reported, 2026-10-29, https://www.omc-stepperonline.com/nema-23-bipolar-3nm-425oz-in-4-2a-57x57x114mm-4-wires-stepper-motor-cnc.html)
- 100+: $23.97 (reported, 2026-10-29, https://www.omc-stepperonline.com/nema-23-bipolar-3nm-425oz-in-4-2a-57x57x114mm-4-wires-stepper-motor-cnc.html)

## Specifications
- Frame size: NEMA 23 (57 mm max)
- Holding torque: 3.00 N·m
- Rated current: 4.2 A/phase
- Step angle: 1.8°
- Body length: 113 mm max
- Integrated driver: No
- Phase resistance: 0.90 Ω ±10% @25°C
- Phase inductance: 3.80 mH ±20% @1 kHz
- Rotor inertia: 800 g·cm²
- Mass: 1.60 kg
- Shaft: Ø10 mm

## Links
- Product: https://www.omc-stepperonline.com/nema-23-bipolar-3nm-425oz-in-4-2a-57x57x114mm-4-wires-stepper-motor-cnc.html
- Datasheet: https://www.oyostepper.com/images/upload/File/23HS45-4204S.pdf
- CAD: none

## Sources
- https://www.oyostepper.com/images/upload/File/23HS45-4204S.pdf (23HS45-4204S drawing/spec sheet (Oyostepper-branded copy of the same part): torque, current, R, L, inertia, mass, dimensions)
- https://www.omc-stepperonline.com/nema-23-bipolar-3nm-425oz-in-4-2a-57x57x114mm-4-wires-stepper-motor-cnc.html (price tiers ($28.70 qty1 ... $23.97 qty100) from search-indexed omc-stepperonline listing; direct fetch returned 403)