SG-2877 3 Nm Hub Gear Motor¶
Product Overview¶
SG-2877 is a compact 99 mm hub gear motor using a planetary reduction structure. It is designed for AGV, AMR, mobile robots, rehabilitation platforms and compact wheel-drive systems that require moderate torque in a compact package.
The standard catalog configuration uses Hall sensors. An external motor controller is required unless a controller is specifically included in the quotation.
Product Identity¶
| Item | Description |
|---|---|
| Model | SG-2877 |
| Product type | Hub gear motor |
| Transmission | Planetary gearbox |
| Housing material | PA66 |
| Gear material | POM |
| Standard sensor | Hall sensors |
Key Specifications¶
| Parameter | Value |
|---|---|
| Outer diameter | 99 mm |
| Product thickness | 64 mm |
| Overall length including shaft | 117 mm |
| Reduction ratio | 9.75:1 |
| Rated voltage | 24 VDC |
| Rated power | 45 W |
| Rated current | < 3 A |
| No-load speed | 140 rpm ±10% |
| Rated speed | 130 rpm ±10% |
| Rated torque | 3 Nm |
| Peak torque | 10 Nm |
| Maximum efficiency | > 70% |
| Backlash | < 1.5° |
| Waterproof rating | IP67 |
| Weight | 780 ± 20 g |
Motor and Electrical Parameters¶
| Parameter | Value |
|---|---|
| Phase resistance, catalog notation | 0.82 ±8% mΩ |
| Phase inductance | 0.75 ±8% mH |
| Full-scale phase current | 15 A max |
| Rated bus current | 7.5 A max |
| Locked-rotor current | < 8 A |
| Rated motor load | 0.3 Nm |
| Hall angle | 120° |
| Motor structure | 18 slots / 20 poles |
| Insulation class | Class B |
Peak Torque Condition¶
Peak torque: 10 Nm
Peak-torque duration depends on the controller current limit, battery voltage, duty cycle, cooling, installation and ambient conditions. Confirm the required peak duration before selection.
Standard Configuration¶
The standard catalog configuration includes:
- BLDC motor
- Planetary reduction mechanism
- PA66 housing
- Hall sensors
- Output shaft and mounting structure shown in the approved drawing
Unless explicitly included in the quotation, the following are not standard claims:
- Integrated driver
- Absolute encoder
- CAN, RS485 or EtherCAT communication
- Position or torque closed-loop control
- Wheel, tire or vehicle-side mounting hardware
Typical Applications¶
- AGV and AMR wheel drives
- Mobile service robots
- Rehabilitation mobile platforms
- Inspection robots
- Compact transport mechanisms
- Custom wheel-drive assemblies
Engineering Documents¶
STEP models, 2D drawings, cable definitions and detailed mounting documents are available after application review and inquiry.
Please provide wheel diameter, vehicle weight, required speed, required gradeability, wheel quantity, operating voltage, duty cycle and estimated order quantity.
Related Wheel Drive Resources¶
Hub Gear Motor Product Family AGV and AMR Wheel Drive Selection Guide Request CAD, Sample and Quote
Contact SigGear¶
Wanrong Wang
International Sales, SigGear
wangwanrong@siggear.com