The rail fastening system can withstand the vertical, horizontal, and longitudinal forces generated during the train's operation. At the same time, it has a certain elasticity to buffer vibration and noise, ensuring the smoothness and safety of the train's operation.
The KPO fastening system is a wedge-shaped fastening commonly used on wooden and steel sleepers, applicable to ordinary railways, light rails, and low-speed railways.The KPO fastening system is also widely used all over the world. It belongs to clamp fastening system. The clamps includes KPO3, KPO5, KPO6 and KPO9 etc. It has better clamping force and longer duration life than normal fastening system, and it also is an only system which is widely used for Crane Rails.
KPO Railway Fastener System Components
KPO clip/Screw spike/HS bolt /Hex nut/Double coil spring washer
| Specifications for ONE unit of KPO rail fastening system | ||||
| Item | Quantity | Type | Material | Standard |
| KPO clip | 2 | KPO3, KPO6, KPO9 | Q235 | DIN5906 |
| Screw spike | 2 | M24×150mm M24×160mm M24 ×180mm | Grade 4.6: Q235 | ISO898-1, UIC864-1 and NF F500-50 |
| other length as ordered | Grade 5.6: 35# | |||
| Grade 8.8: 45# | ||||
| HS bolt | 4 | HS26, HS32 | Grade4.6: Q235 | Diameter: 22mm or 24mm |
| Grade5.6: 35# | Length: 55mm, 65mm, 75mm, 90mm | |||
| Grade8.8: 45# | ||||
| Hex nut | 2 | As ordered | Grade 5: 35# | DIN958 |
| Grade 8: 45# | ||||
| Double coil | 2 | As ordered | 65Mn | UIC864-3 |
| spring washer | ||||
| Base plate | 1 | UIC54,UIC60, 50kg rail | Casting iron QT500-7 | UIC864-6 |
| 60kg rail,S49 in ordered size | QT450-10 | |||
| forging low carbon steel | ||||
| or high carbon steel | ||||
