Specifications:
The 28mm Planetary Gearbox, model RP28, has a permissible load range of 0.1N.m to 1.0N.m. The ring material is unspecified, but the output is supported by ball bearings. The gearbox can handle a maximum radial load of 50N (6mm from the flange) and a maximum shaft axial load of 30N. The radial play of the shaft near the flange is ≤0.08 mm, and the axial play is ≤0.3 mm. The backlash at no-load is ≤2.5°, and the maximum shaft press fit force is 60N. The module is 0.5 with 11 and 17 teeth, and a pressure angle of 20°. Hole diameters are Φ2.02 and Φ2.32.

Reduction Ratios and Torque:
The gearbox offers various reduction ratios: 1/5, 1/20, 1/25, 1/80, 1/100, 1/125, 1/4, 1/16, 1/64, and 1/39. The rated tolerance torque and maximum momentary tolerance torque vary with the reduction ratio:

• 1/4, 1/5: Rated 0.1 N.m, Max 0.3 N.m, Efficiency 90%, Length 23.3±0.5 mm, Weight 65g
• 1/16, 1/20, 1/25: Rated 0.4 N.m, Max 1.2 N.m, Efficiency 81%, Length 29±0.5 mm, Weight 88g
• 1/64, 1/80, 1/100, 1/125: Rated 0.8 N.m, Max 2.4 N.m, Efficiency 73%, Length 34.7±0.5 mm, Weight 110g
• 1/256, 1/320, 1/400, 1/500, 1/625: Rated 1.0 N.m, Max 3.0 N.m, Efficiency 66%, Length 40.4±0.5 mm, Weight 141g

Motor Installation:
The input and output have the same rotation direction. The maximum motor input speed is less than 10000rpm. The operating temperature range is -15℃ to +80℃.

Material:
The planetary gearbox motor is made from powder metal.