The size of this gearbox is 42 x 42mm and the input shaft diameter is 5mm. This high-precision planetary gearbox is belong to HPR series gearbox, it with gear ratio 3:1 / 4:1 / 5:1 / 7:1 / 10:1/ 16:1 / 20:1 / 25:1 / 28:1 / 35:1 / 40:1  / 50:1 / 70:1 /100:1 and a maximum 15arc-min~20arc-min backlash. It's an excellent choice for applications that require good accuracy and reliability at an exceptional value. This inline planetary gearbox built-in an input shaft coupling which can match any standard Nema 17 stepper motor and brushless dc motor.

Gearbox Specifications:

• Model: HPR42-L/LSW Series

• Gearbox Type: Planetary Gearbox

• Gear Ratio: 3:1 / 4:1 / 5:1 / 7:1 / 10:1/ 16:1 / 20:1 / 25:1 / 28:1 / 35:1 / 40:1  / 50:1 / 70:1 /100:1

• Efficiency: 96% / 94%

• Backlash: ≤15 arcmin - 20 arcmin

• Rated Torque: 5N.m - 12N.m

• Sundden Stop Torque: 10N.m - 24N.m

• Shaft Maximum Axial Load: 100N

• Shaft Maximum Radial Load: 300N

• Rated Input Speed: 3000rpm

• Max Input Speed: 6000rpm

• Average Life Span: 20000h

• Noise: ≤65dB

• Protection Level: iP54

Physical Specifications:

• Gearbox Length: L: 61.5mm / 72.5mm,LSW: 76.5mm / 87.5mm

• Gearbox Shaft Diameter: Φ8mm

• Gearbox Shaft Length: 21.5mm

• Gearbox Key Length: 14mm

• HPR42-L1/L2 Weight: 0.25kg / 0.35kg

• HPR42-L1SW /L2SW Weight: 0.29kg / 0.38kg

HPR42-L Planetary Gearbox Specification:

HPR42-LSW Planetary Gearbox Specification:

Planetary Gearbox Physical Specification: