The FAT Series Hollow Output Shaft with Torque-Arm Mounted Parallel Shaft Helical Gearbox is specially engineered for industrial drive systems requiring shaft-mounted installation, compact structure, and high-efficiency parallel shaft power transmission. Featuring a torque-arm mounted hollow output shaft design, the gearbox can be directly installed onto the driven shaft without the need for a base or flange, significantly reducing installation space while simplifying equipment assembly and maintenance. Combined with precision-ground parallel shaft helical gears, the FAT Series provides smooth operation, high transmission efficiency, low operating noise, and exceptional load capacity. Compatible with IEC motor input or solid shaft input, the gearbox is widely used in belt conveyors, bucket elevators, mining equipment, bulk material handling systems, environmental protection machinery, and automated conveying equipment. Output torque reaches up to 20,000 Nm, with motor power ranging from 0.12 kW to 200 kW, depending on model configuration.
| Item | Specification |
| Gear Type | Parallel Shaft Helical Gear |
| Mounting Type | Torque-Arm Mounted |
| Input Type | IEC Motor Input / Solid Shaft Input |
| Output Type | Hollow Output Shaft |
| Gear Material | High-Strength Alloy Steel |
| Gear Hardness | HRC58–62 |
| Transmission Efficiency | Up to 96% |
| Ratio Range | 3.8 – 281.7 |
| Output Torque | Up to 20,000 Nm |
| Motor Power | 0.12 – 200 kW |
| Housing Material | High-Strength Cast Iron |
| Lubrication | Oil Bath Lubrication |
| Protection Class | IP55 (Optional IP65) |
| Ambient Temperature | -20°C to +40°C |
| Model | Ratio Range | Output Torque (Nm) | Motor Power (kW) |
| FAT37 | 3.8 – 60 | 200 | 0.12 – 3 |
| FAT47 | 5 – 80 | 450 | 0.18 – 5.5 |
| FAT57 | 5 – 100 | 900 | 0.37 – 7.5 |
| FAT67 | 6 – 150 | 2,000 | 0.75 – 15 |
| FAT77 | 8 – 180 | 4,500 | 1.5 – 30 |
| FAT87 | 10 – 220 | 8,500 | 2.2 – 55 |
| FAT97 | 12 – 250 | 13,000 | 4 – 110 |
| FAT107 | 15 – 281.7 | 20,000 | 7.5 – 200 |
