T42H38-1684 NEMA-17 Step Motor
NEMA 17 stepper motor, 38mm body, 1.68 A/phase, 0.35 Nm / 3.6 kg-cm holding torque, 4 lead wires.
Overview
The T42H38-1684 is a NEMA 17 stepper motor sharing the T42H38-1206's 38mm body and winding resistance, wound for higher current and correspondingly more torque.
It draws 1.68 A per phase (1.65 ohm, 3.2 mH) and holds 0.35 Nm / 3.6 kg-cm at standstill, about 44% more torque than the T42H38-1206 for a current increase most small stepper drives can absorb without a size change - the Tstep-484 (0.7-4.0 A) or Tstep-087 range both cover it.
Four lead wires bring out one connection per phase, fixed in series at the factory rather than switchable like the six-wire T42H38-1206 - simpler wiring, at the cost of not being able to reconfigure for parallel operation later.
Where a longer, higher-torque body is needed in the same NEMA 17 footprint, the T42H47-1504 and T42H47-1684 step up in body length and torque, keeping the same 42mm mounting flange throughout the group so the mechanical design doesn't need to change if more torque turns out to be needed later.
Supplied by Tiny Controls in India.
Specifications
| Flange size | 42 mm (NEMA 17) |
|---|---|
| Phase current | 1.68 A |
| Holding torque | 0.35 Nm \ 3.6 kg-cm |
| Phase resistance | 1.65 Ω |
| Phase inductance | 3.2 mH |
| Lead wires | 4 |
Downloads
Questions
Your T42H38-1206 has 6 leads — why does this one only have 4?
This motor's leads are fixed in series at the factory rather than switchable like the six-wire T42H38-1206 — simpler wiring, at the cost of not being able to reconfigure for parallel operation later.
What drive covers this motor?
The Tstep-484 (0.7-4.0A) or Tstep-087 range, both.
How much more torque does this give me over the T42H38-1206?
About 44% more — for a current increase most small stepper drives can absorb without a size change.
If I need a longer body with more torque later, does the mounting change?
No — the T42H47-1504 and T42H47-1684 step up in body length and torque while keeping the same 42mm mounting flange, so the mechanical design doesn't need to change.