The KRF Series Solid Output Shaft Combined Helical Bevel Gearbox adopts a combined reduction structure by integrating an inline helical gearbox with a helical bevel gearbox, providing significantly higher reduction ratios while maintaining excellent transmission efficiency, high torque output, and compact installation dimensions. Featuring flange-mounted installation and a solid output shaft, it is particularly suitable for heavy-duty conveying, lifting, mixing, mining, and bulk material handling applications requiring extremely low output speed and high torque.
With a torque range up to 80,000 Nm and power ratings up to 200 kW, the KRF Series is an ideal drive solution for demanding industrial applications where reliable high-ratio power transmission is required.
| Item | Specification |
| Product Series | KRF Series |
| Gear Type | Combined Helical & Helical Bevel Gearbox |
| Mounting Type | Flange Mounted |
| Output Shaft | Solid Shaft |
| Gear Material | Hardened Alloy Steel |
| Housing Material | High-strength Cast Iron |
| Gear Ratio | Approx. 20:1 – 35,000:1 |
| Output Torque | Up to 80,000 Nm |
| Motor Power | 0.18 – 200 kW |
| Efficiency | Up to 96% (depending on ratio) |
| Lubrication | Oil Bath Lubrication |
| Mounting Positions | B3, B5, V1, V3, etc. |
| Ambient Temperature | -20°C ~ +40°C |
| Protection Class | IP55 / IP65 Optional |
| Model | Output Torque (Nm) | Ratio | Motor Power (kW) |
| KRF37 | 300 – 1,800 | 20 – 350 | 0.18 – 3 |
| KRF47 | 500 – 3,500 | 25 – 500 | 0.37 – 5.5 |
| KRF57 | 900 – 6,500 | 30 – 800 | 0.75 – 11 |
| KRF67 | 1,800 – 12,000 | 40 – 1,500 | 1.5 – 22 |
| KRF77 | 3,500 – 20,000 | 60 – 3,000 | 2.2 – 45 |
| KRF87 | 6,500 – 35,000 | 80 – 8,000 | 4 – 90 |
| KRF97 | 12,000 – 55,000 | 100 – 15,000 | 7.5 – 160 |
| KRF107 | 20,000 – 80,000 | 120 – 35,000 | 11 – 200 |
Note: Customized ratios, shaft dimensions, motor brands, mounting arrangements and sealing options are available upon request.
