T57H76-2804B NEMA-23 Stepping Motor
NEMA 23 stepper motor, 76mm body, 2.8 A/phase, 1.85 Nm / 18.9 kg-cm holding torque, 4 leads.
Overview
The T57H76-2804B is a NEMA 23 stepper motor with the same electrical spec as the T57H76-2804 - 2.8 A per phase, 1.13 ohm, 3.6 mH, 1.85 Nm / 18.9 kg-cm holding torque, 76mm body - listed as a separate SKU. The published spec sheet does not call out what distinguishes the two; check with Tiny Controls before assuming a mechanical difference such as shaft length if that matters for a specific mount.
The 2.8 A current suits a Tstep-087 or Tstep-117X range drive (1.2-7.0 A).
Four lead wires bring out one connection per phase, fixed in series at the factory.
Where less torque is enough, the T57H56-2804B and T57H51-2804 share the same 2.8 A current in shorter bodies. All share the same NEMA 23 mounting flange, so a mount built for any of them fits the rest, and all wire four leads in fixed series with no reconfiguration option.
Supplied by Tiny Controls in India.
Specifications
| Flange size | 57 mm (NEMA 23) |
|---|---|
| Phase current | 2.8 A |
| Holding torque | 1.85 Nm \ 18.9 kg-cm |
| Phase resistance | 1.13 Ω |
| Phase inductance | 3.6 mH |
| Lead wires | 4 |
Downloads
Questions
I need a purchasing note for the record — what distinguishes this from the T57H76-2804?
Not stated in the published spec sheet, same as the T57H56/T57H56B pair — check with Tiny Controls directly before assuming a mechanical difference (like shaft length) matters for your specific mount.
Can I rewire this for higher speed like some of your 8-wire motors?
No — four leads, fixed in series at the factory, with no reconfiguration option.
If 1.85 Nm turns out to be more than I need at the same current?
The T57H56-2804B and T57H51-2804 share the same 2.8A current in shorter, lower-torque bodies.
What drive covers this?
A Tstep-087 or Tstep-117X range drive (1.2-7.0A).
Does a mount built for this fit the rest of the T57H family?
Yes — all share the same NEMA 23 mounting flange.