| Cylinder hole circularity | 0.005mm |
| Surface parallelism | 0.03mm |
| Locating pin hole coordinate accuracy | 0.05mm |
The display of our piston contour is controlled in 0.02mm compared with the theoretical value to guarantee the perfect air-proof and directional performance
| Piston skirt size | -0.02~~-0.03mm |
| Ring Grove Height | +0.005~+0.015mm |
| Pin-hole diameter | +0.002~+0.008mm |
| Pin hole roughness | Ra0.4 |
| Verticality of pin hole to skirt shaft | 100: 0.035 |
Base on the above matching precision our piston takes a excellent using performance
| Diameter Precision | ≤0.002mm |
| Roughness | Ra0.4 |