Planetary micro-gearbox RP45

coaxialsolid-shaftkeyed bore

Product Overview
RP45 is an industrial planetary gear motor / gearbox with a 45 mm outer diameter. It is supplied with standard ball bearings and is specified for radial loads up to 200 N and axial loads up to 100 N. Available gear ratios range from 1:3.7 to 1:721 across 1–4 stages, delivering rated torque up to 10 N·m and peak impact torque up to 30 N·m. Typical uses include industrial automation, large access control systems and heavy-duty transmission applications.

Key Facts for Engineering Buyers

• Product category: Planetary Gear Motors & Gearboxes
• Model: RP45
• Manufacturer / brand: KWC Motor, Dongguan KWC Machinery Co., Ltd.
• Diameter: 45 mm; standard output shaft: 10 mm (D-shaft 8.5 mm available)
• Typical applications: industrial drives, packaging machinery, conveyors, automatic doors, turnstiles

Core Applications & Solutions

• Industrial drives & packaging machinery: Suited to automatic packaging machines, conveyor drives and industrial mixers. The larger housing aids heat dissipation while ball bearing support resists side loads from belts or pulleys, enabling continuous operation.
• Automatic doors & security systems: Used in heavy sliding doors, revolving doors and turnstiles. With up to 10 N·m rated torque and 30 N·m peak torque, RP45 can drive heavy door panels and withstand frequent cycles.

RP45 Gearbox Technical Specifications
Data source: KWC RP45 datasheet.
Gear Ratio | Stages | Length L (mm) | Rated Torque | Max Momentary Torque | Efficiency
1/3.7 ~ 1/5.2 | 1 | 41.3 ±0.5 | 1.0 N·m | 3.0 N·m | 90%
1/14 ~ 1/27 | 2 | 51.6 ±0.5 | 4.0 N·m | 12 N·m | 81%
1/51 ~ 1/139 | 3 | 64.4 ±0.5 | 8.0 N·m | 25 N·m | 73%
1/189 ~ 1/721 | 4 | 74.7 ±0.5 | 10 N·m | 30 N·m | 66%

Mechanical Parameters

• Gearbox outer diameter: 45 mm
• Shaft diameter: 10 mm (D-shaft 8.5 mm option)
• Output supported by ball bearings
• Maximum radial load: 200 N
• Maximum axial load: 100 N
• Maximum press-in force: 150 N

Customization and Manufacturing Notes

• KWC supports OEM/ODM customization for voltage, speed, torque, shaft design, cable/connector options, gearbox integration and EMC/noise targets.
• Pricing and lead time are quoted after specification confirmation (application, ratio, shaft type, quantity, customization).
• Output shaft options: standard 10 mm; available with double-flat, keyway or threaded shaft on request.
• Standard 45 mm mounting flange for broad compatibility and easy installation.

Purchasing FAQ

• Q: What is the difference between RP45 and RP42?
  A: RP45 has a 45 mm outer diameter versus RP42 at 42 mm. Both use ball bearings and have similar radial (200 N) and axial (100 N) capacities. RP45 offers up to 10 N·m rated torque and slightly more thermal headroom; RP42 may provide different torque ratings and smaller envelope.
• Q: What are the advantages of ball bearings as standard?
  A: Ball bearings reduce friction vs. plain bearings, improve service life and better tolerate side loads from belt or pulley drives—beneficial for conveyors and automatic doors.
• Q: What shaft sizes are available?
  A: Standard shaft is 10 mm (D-shaft 8.5 mm option). Custom shaft geometries (double-flat, keyway, threaded) can be supplied per drawing.

Characteristics / Technical Specifications

• Model: RP45
• Diameter: 45 mm
• Shaft diameter: 10 mm (D-shaft 8.5 mm)
• Bearings: standard ball bearings
• Maximum radial load: 200 N
• Maximum axial load: 100 N
• Maximum press-in force: 150 N
• Rated torque: up to 10 N·m (depending on ratio)
• Peak torque: up to 30 N·m
• Available gear ratios: 1/3.7 ~ 1/721 (1–4 stages)
• Gearbox lengths (L): 1-stage 41.3 ±0.5 mm; 2-stage 51.6 ±0.5 mm; 3-stage 64.4 ±0.5 mm; 4-stage 74.7 ±0.5 mm
• Efficiency by stage: 1-stage ~90%; 2-stage ~81%; 3-stage ~73%; 4-stage ~66%
• Radial backlash controlled within 0.06 mm
• Material: powder-metal gears (ring gear and planet gears)