Stepper 24H20 series

Product overview
Size 24 (60 mm frame) 2-phase hybrid rotary stepper motors, 24H series. Holding torque up to 3.0 N·m depending on model. Encoder and 60 mm planetary gearbox options are available for positioning and torque increase.

Parameters
Step angle: 1.8° ±5%
Resistance tolerance: ±10% @ 20°C
Inductance tolerance: ±20% @ 1 kHz
Insulation class: B
Duty type: S1 (continuous)
Dielectric strength: 500 VAC / 1 kHz / 1 mA / 1 s
Insulation resistance: 100 MΩ / 500 VDC
Permissible radial load (from mounting surface): 5 mm = 210 N; 10 mm = 170 N; 15 mm = 140 N; 20 mm = 120 N

Motor types and electrical / mechanical parameters

• 24H2047 — Current: 2.0 A (RMS); Resistance: 1.5 Ω; Inductance: 3.4 mH; Holding torque: 1.0 N·m; Rotor inertia: 240 g·cm²; Length: 47 mm; Mass: 600 g
• 24H2056 — Current: 3.0 A (RMS); Resistance: 0.8 Ω; Inductance: 2.3 mH; Holding torque: 1.5 N·m; Rotor inertia: 340 g·cm²; Length: 56 mm; Mass: 800 g
• 24H2068 — Current: 4.0 A (RMS); Resistance: 0.6 Ω; Inductance: 1.9 mH; Holding torque: 2.1 N·m; Rotor inertia: 490 g·cm²; Length: 68 mm; Mass: 1000 g
• 24H2085 — Current: 5.0 A (RMS); Resistance: 0.4 Ω; Inductance: 1.8 mH; Holding torque: 3.0 N·m; Rotor inertia: 690 g·cm²; Length: 85 mm; Mass: 1300 g

Material
End bell: Aluminum alloy
Bearing: Deep groove ball bearing
Magnet: Sintered NdFeB
Shaft: Stainless steel
Wiring: UL 3265, 20/22 AWG

Dimensional drawing
Dimension drawings and model-specific outlines are available for Size 24 (60 mm) to support mechanical integration and panel design.

Torque performance curves
Speed‑torque curves are provided per model (24H2047, 24H2056, 24H2068, 24H2085) to assist selection for dynamic and static load requirements.

Encoder option
Resolution (CPR) available: 50, 100, 192, 200, 250, 256, 360, 400, 500, 720, 900, 1000, 1250, 2000, 2500, 4000, 5000
Output types: single‑ended and differential variants available for integration with controllers and drives.

Planetary gearbox (60 mm frame) — summary
Housing material: Metal
No‑load backlash: 1st stage 15 arcmin; 2nd stage 25 arcmin
Bearing: Ball bearing
Typical options include:

• Ratio 5 / Rated torque 6 N·m / Limit torque 12 N·m / Stages 1 / Efficiency 95% / Length 53 mm / Mass 900 g
• Ratio 10 / (same package values in ratio group)
• Ratio 15 / Rated torque 25 N·m / Limit torque 40 N·m / Stages 2 / Efficiency 90% / Length 70 mm / Mass 1200 g

Power‑off brake (Size 24 option)
Rated voltage: DC 24 V ±5%
Resistance: 141 Ω ±10%
Power: 5 W
Hold torque: > 2 N·m
Insulation class: B
Insulation resistance: > 100 MΩ (DC 500 V)
Dielectric strength: AC 1000 V for 1 s
Retract time: 50 ms; Release time: 50 ms
Gyration gap: 1°
Emergency brake cycles: 200 cycles
Lifetime: 500,000 cycles
Noise level: < 60 dB

Characteristics / technical specifications

• Product family: 24H series, Size 24 (60 mm frame), 2‑phase hybrid rotary stepper motors
• Max. holding torque (series): up to 3.0 N·m (model dependent)
• Step angle: 1.8° ±5%
• Electrical range: currents 2.0 A to 5.0 A (RMS) depending on model
• Available encoder resolutions: 50–5000 CPR (single‑ended and differential outputs)
• Available options: 60 mm planetary gearbox (multiple ratios), power‑off brake (DC 24 V)
• Key materials: end bell aluminum alloy; shaft stainless steel; magnet sintered NdFeB; bearings deep groove ball / ball bearing
• Wiring: UL 3265, 20/22 AWG
• Typical motor body lengths: 47, 56, 68, 85 mm; mass range: ~600 g to 1300 g