T42H38-1206 NEMA-17 Six wire Step Motor
NEMA 17 stepper motor, 38mm body, 1.2 A/phase, 0.25 Nm / 2.5 kg-cm holding torque, 6 lead wires.
Overview
The T42H38-1206 is a NEMA 17 stepper motor with a 38mm body, the lowest-current and lowest-torque motor in the 42mm-flange group in this catalogue.
It draws 1.2 A per phase (1.65 ohm winding resistance, 3.2 mH inductance) and holds 0.25 Nm / 2.5 kg-cm at standstill. That current sits well inside the range of a small stepper drive such as the Tstep-484 (0.7-4.0 A), which is the natural pairing for a motor this size.
Six lead wires bring both halves of each phase winding out separately, so they can be connected in series for more torque at low speed or parallel for better torque at high speed, rather than being fixed at the factory as on a four-wire motor. That flexibility is useful when the same motor might see service on more than one axis design.
For more torque in the same 42mm frame, the T42H38-1684, T42H47-1504 and T42H47-1684 step up in current and body length.
Supplied by Tiny Controls in India.
Specifications
| Flange size | 42 mm (NEMA 17) |
|---|---|
| Phase current | 1.2 A |
| Holding torque | 0.25 Nm \ 2.5 kg-cm |
| Phase resistance | 1.65 Ω |
| Phase inductance | 3.2 mH |
| Lead wires | 6 |
Questions
Why does this have 6 leads instead of the usual 4?
Both halves of each phase winding are brought out separately, so you can wire them in series for more torque at low speed, or parallel for better torque at high speed — rather than being fixed at the factory like a four-wire motor. Useful if the same motor might see service on more than one axis design.
What drive is the natural pairing for this motor?
The Tstep-484 (0.7-4.0A) — its current sits well inside that range.
Is this the lowest-torque motor in your 42mm-body group?
Yes — the lowest-current and lowest-torque motor in that group.
If I need more torque in the same frame size, what steps up?
The T42H38-1684, T42H47-1504 and T42H47-1684 step up in current and body length.