NEMA 23 57 mm Rotary Stepper Motor
The Size 23 / 57 mm 2-phase hybrid rotary stepper motor provides higher torque rotary positioning with up to 3.0 N·m holding torque.
Encoder options, 57 mm planetary gearbox solutions, power-off brake options, and custom windings are available for OEM applications.
Parameters
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| General Specification | Value |
|---|---|
| Step Angle Accuracy | 1.8° ±5% |
| Resistance Accuracy | ±10% @ 20°C |
| Inductance Accuracy | ±20% @ 1 kHz |
| Insulation Class | B |
| Duty Type | S1 |
| Dielectric Strength | 500 VAC / 1 kHz / 1 mA / 1 s |
| Insulation Resistance | 100 MΩ / 500 VDC |
| Permissible Radial Load | 5 mm Distance | 10 mm Distance | 15 mm Distance | 20 mm Distance |
|---|---|---|---|---|
| Load from Mounting Surface | 180 N | 130 N | 100 N | 90 N |
| Type | Current A RMS | Resistance Ω | Inductance mH | Holding Torque N·m | Holding Torque oz-in | Rotor Inertia g·cm² | Length mm | Mass g |
|---|---|---|---|---|---|---|---|---|
| 23H2042 | 1.0 | 4.2 | 9 | 0.60 | 85.0 | 140 | 42 | 460 |
| 23H2045 | 1.0 | 4.5 | 12 | 0.80 | 113.3 | 180 | 45 | 520 |
| 23H2051 | 2.0 | 1.5 | 4.4 | 1.00 | 141.6 | 240 | 51 | 640 |
| 23H2055 | 2.0 | 1.6 | 5.2 | 1.20 | 169.9 | 280 | 55 | 720 |
| 23H2065 | 3.0 | 0.9 | 2.7 | 1.60 | 226.6 | 350 | 65 | 860 |
| 23H2076 | 4.0 | 0.6 | 2.4 | 2.00 | 283.2 | 480 | 76 | 1060 |
| 23H2100 | 5.0 | 0.46 | 2.3 | 3.00 | 424.8 | 720 | 100 | 1500 |
| Material | Specification |
|---|---|
| End Bell | Aluminum Alloy |
| Bearing | Deep Groove Ball Bearing |
| Magnet | Sintered NdFeB |
| Shaft | Stainless Steel |
| Wiring | UL 3265, 20/22 AWG |
Dimensional Drawing
Torque Performance Curves
Available Options
Encoder Options
EK2 encoder options are available with single-ended or differential output selections across multiple CPR resolutions.
57 mm Planetary Gearbox
Metal housing gearbox options support 5:1 to 25:1 ratios with one or two stage configurations.
Power-Off Brake
Size 23 brake option rated 24 VDC with >2 N·m hold torque for holding vertical or safety-sensitive axes when power is removed.
Custom Windings
Custom winding, cabling, shaft, connector, and mechanical options are available for OEM integration.
| Resolution CPR | 50 | 100 | 192 | 200 | 250 | 256 | 360 | 400 | 500 | 720 | 900 | 1000 | 1250 | 2000 | 2500 | 4000 | 5000 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Single-Ended Output | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | ||||
| Differential Output | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q |
| Housing Material | Metal | |||||
|---|---|---|---|---|---|---|
| No Load Backlash | First stage 15 arcmin, second stage 25 arcmin | |||||
| Bearing | Ball Bearing | |||||
| Ratio | Rated Torque N·m | Limit Torque N·m | Stages | Efficiency | Length mm | Mass g |
| 5 | 6 | 12 | 1 | 95% | 53 | 800 |
| 10 | 6 | 12 | 1 | 95% | 53 | 800 |
| 15 | 25 | 40 | 2 | 90% | 70 | 1100 |
| 20 | 25 | 40 | 2 | 90% | 70 | 1100 |
| 25 | 25 | 40 | 2 | 90% | 70 | 1100 |
| Rated Voltage | DC 24 V ±5% |
|---|---|
| Resistance | 141 Ω ±10% |
| Power | 5 W |
| Hold Torque | >2 N·m |
| Insulation | B |
| Insulation Resistance | >100 MΩ (DC 500 V) |
| Dielectric Strength | AC 1000 V for 1 sec |
| Retraction Time | 50 ms |
| Release Time | 50 ms |
| Gyration Gap | 1° |
| Emergency Brake Cycle | 200 cycles |
| Lifetime | 500,000 cycles |
| Noise Level | <60 dB |
Customizations
Mechanical
Mounting configurations, shaft configurations, end machining, NEMA size, length, bearings, lubricants, and dampers.
Electrical
Custom windings, insulation class, voltage and current ratings, cabling, connectors, and driver compatibility.
Feedback & Motion
Encoders, gearboxes, step angles, holding torque, speed targets, and application-specific motion profiles.
Integrated Assemblies
Motor plus encoder, gearbox, brake, or application-specific mounting features.
Part Number Builder
23
Motor frame size: Size 23 / 57 mm.
H
Hybrid rotary stepper motor series.
Length
Available motor lengths include 42, 45, 51, 55, 65, 76, and 100 mm.
Current
Current codes align with motor winding options such as 100, 200, 300, 400, and 500.
Downloads
Catalogs
23H2042-100-4AL
23H2042-100-4BL
23H2051-200-4AL
23H2051-200-4BL
23H2065-300-4AL
23H2065-300-4BL
23H2076-400-4AL
23H2076-400-4BL
Need help selecting or customizing a NEMA 23 rotary stepper motor?
DINGS’ Motion USA can help review holding torque, winding, shaft design, encoder requirements, gearbox integration, brake options, cabling, bearings, clean room needs, and custom mechanical features for your application.