Stepper 17H2031

Overview
The Size 17 (42 mm) 2‑phase hybrid rotary stepper motor family delivers holding torque up to 0.72 N·m. Encoders, 42 mm planetary gearboxes and power‑off brake options are available for integration in industrial motion systems.

General specifications

• Step angle: 1.8° ±5%
• Resistance: ±10% @ 20 °C
• Inductance: ±20% @ 1 kHz
• Insulation class: B
• Duty: S1 (continuous)
• Dielectric strength: 500 VAC / 1 kHz / 1 mA / 1 s
• Insulation resistance: 100 MΩ / 500 VDC
• Permissible radial load (5 mm from mounting face): 50 N; (10 mm): 40 N; (15 mm): 25 N; (20 mm): 20 N

Available models

• 17H2031 — 1.2 A (RMS) | R = 1.7 Ω | L = 2.3 mH | Holding torque 0.16 N·m | Rotor inertia 23 g·cm² | Length 30.1 mm | Mass 200 g
• 17H2034 — 1.2 A | R = 2.1 Ω | L = 2.7 mH | Holding torque 0.25 N·m | Rotor inertia 25 g·cm² | Length 34.1 mm | Mass 230 g
• 17H2041 — 1.2 A | R = 2.4 Ω | L = 4.7 mH | Holding torque 0.40 N·m | Rotor inertia 54 g·cm² | Length 40.1 mm | Mass 300 g
• 17H2049 — 2.0 A | R = 1.3 Ω | L = 2.0 mH | Holding torque 0.48 N·m | Rotor inertia 77 g·cm² | Length 48.1 mm | Mass 360 g
• 17H2061 — 2.0 A | R = 1.7 Ω | L = 3.6 mH | Holding torque 0.72 N·m | Rotor inertia 110 g·cm² | Length 60.1 mm | Mass 500 g

Materials

• End bell / housing: Aluminum alloy
• Bearing: Deep groove ball bearing
• Magnet: Sintered NdFeB
• Shaft: Stainless steel
• Wiring: UL 3265, 26/24 AWG

Dimensional drawings
Dimensional drawings and JPEG illustrations are provided for Size 17 (42 mm) variants to support installation and mechanical integration.

Torque performance curves
Speed‑torque curves are available per model for 17H2031‑120, 17H2034‑120, 17H2041‑120, 17H2049‑200 and 17H2061‑200 to support motion design.

Options — Encoders (EK1 / EK2)

• EK1 resolutions (CPR): 100, 108, 120, 125, 128, 200, 250, 256, 300, 360, 400, 500, 512, 720, 800, 1000 (single‑ended and differential mapping tables provided)
• EK2 resolutions (CPR): 50, 100, 192, 200, 250, 256, 360, 400, 500, 720, 900, 1000, 1250, 2000, 2500, 4000, 5000 (single‑ended and differential mapping tables provided)

Options — Planetary gearbox (42 mm)

• Housing material: Metal
• No‑load backlash: ~1.2°
• Bearing: Ball bearing
• Example ratios and specs: 3.7 — Rated torque 1 N·m | Limit 3 N·m | Stages 1 | Efficiency ~90% | Length 30.6 mm | Mass 260 g; 13.7 — Rated 2 N·m | Limit 6 N·m | Stages 2 | Efficiency ~81% | Length 41.9 mm | Mass 350 g; 26.9/50.9/71.2/99.5 — higher ratios and corresponding torque/length data available

Options — Power‑off brake (Size 17)

• Rated voltage: DC 24 V ±5%
• Resistance: 145 Ω ±10%
• Power: 5 W
• Hold torque: > 0.8 N·m
• Insulation class: B; Insulation resistance >100 MΩ (DC 500 V); Dielectric strength AC 1000 V / 1 s
• Retraction / release time: 50 ms / 50 ms | Gyration gap: 1° | Emergency brake cycles: 200 | Lifetime: 500,000 cycles | Noise <60 dB

Notes
Encoders, planetary gearboxes and brakes are offered as options. Performance curves and dimensional drawings are provided per variant to assist selection and integration.