DC gear-motor QJS28

planetarycoaxialsingle-stage

Product Overview
QJS 28 mm all‑metal planetary gear motor is designed for compact drive systems that require higher torque capacity and mechanical durability. Outer diameter 28 mm, momentary torque up to 90 kgf·cm and maximum continuous torque up to 60 kgf·cm depending on configuration.

Key Features

• Momentary torque up to 90 kgf·cm
• 28 mm outer diameter
• Planetary gear structure for compact, high-torque transmission
• Machined metal gears and metal case
• Stainless steel output shaft with ball bearings
• Available in 1–4 gear stages and multiple reduction ratios
• Customization available (design & manufacturing)

Parameters (table)
Model: QJS 28mm
Gear stages: 1 | 2 | 3 | 4
Reduction ratios: 4, 6 | 16, 24, 36 | 64, 96, 144, 216 | 256, 384, 576, 864, 1296
Gear length (mm): 21.3 | 29.8 | 38.3 | 46.3
Max. allowable continuous torque (kgf·cm): 7.5 | 30 | 50 | 60
Max. allowable momentary torque (kgf·cm): 11 | 45 | 75 | 90
Efficiency (%): 90 | 81 | 73 | 65
Motor length: depends on the specified motor
Outer diameter: 28 mm
Gearbox type: Planetary structure
Output shaft material: Stainless steel
Output shaft bearing type: Ball bearings
Gear material: Machined metal gear
Case material: Metal
Operating humidity: 20%–85% RH
Operating temperature: -30°C–+100°C
Customization: design and manufacturing customization available

Technical specifications

• Model family: QJS
• Outer diameter: 28 mm
• Gearbox type: Planetary structure
• Gear material: Machined metal
• Case material: Metal
• Output shaft: Stainless steel with ball bearings
• Available gear stages: 1, 2, 3, 4
• Reduction ratios available: 4, 6, 16, 24, 36, 64, 96, 144, 216, 256, 384, 576, 864, 1296
• Gear lengths (mm): 21.3 / 29.8 / 38.3 / 46.3 (by stage)
• Max continuous torque: up to 60 kgf·cm (depending on configuration)
• Max momentary torque: up to 90 kgf·cm (depending on configuration)
• Efficiency range: 65%–90% depending on gear stage
• Motor length: depends on the specified motor
• Operating humidity: 20%–85% RH
• Operating temperature: -30°C to +100°C
• Customization: design and manufacturing customization available