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HP421(42mm)- 1.8° per step, 2 Phase
I.CH
Nema 17 Stepping Motor
This planetary gearbox stepper motor offers excellent performance with high precision, high efficiency and wide speed ratio. It features long life, low inertia, low vibration, low noise and low temperature rise. With a compact, neat design, it is easy to install and delivers accurate positioning, ideal for precision motion applications.
Motor Electrical Specification
Series Model | Step Angle ( o ) | L(mm) | Rated Current (A) | Phase Resistance (Ω) | Phase Inductance (mH) | Holding Torque(N.cm) | Lead Wire (NO.) | Motor Weight ( g) |
HP421-04023 | 1.8 | 43 | 2.3 | 0.9 | 1.3 | 40 | 4 | 280 |
HP421-05023 | 1.8 | 51 | 2.3 | 1.1 | 1.5 | 50 | 4 | 350 |
HP421-07023 | 1.8 | 63 | 2.3 | 1.4 | 2.5 | 70 | 4 | 480 |
HP421-08023 | 1.8 | 66 | 2.3 | 1.5 | 2.2 | 80 | 4 | 500 |
Gearbox Specification
Ratio | 3.71 | 5.18 | 6.75 | 14 | 19 | 27 | 35 | 46 | 51 | 71 | 100 | 139 | 181 | 236 | 307 |
Reducer Series | 1 | 2 | 3 | ||||||||||||
Length(mm) | 25.6 | 34 | 42 | ||||||||||||
Rated Torque(N.m) | 0.3 | 1.2 | 2.5 | ||||||||||||
Permissible Torque(Max)(N.m) | 1 | 3.5 | 7.5 | ||||||||||||
Efficiency(%) | 90% | 81% | 73% | ||||||||||||
Weight(g) | 182 | 191 | 230 | ||||||||||||
We can manufacture products according to customer’s requirements | |||||||||||||||
| Mechanical Dimensions |
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Custom Shaft
Round, D-Cut, Cross drilled, Key-Way, Thread or Hollow

Stepper Motor with Encoder
Encoder is customized for customer
Stepper Geared Motor
Planetary Gearbox Stepper Motor
Spur Gearbox Stepper Motor
Connector
Molex, Harwin, Tyco/AMP, JST etc.

Special length, Protective hose