Motorcycle Main Shaft & Countershaft
| Main Shaft & Countershaft Technical Specifications |
| Material | 20CrMo / 20CrMnTi Alloy Steel | Heat Treatment | Carburizing + Quenching + Tempering |
| Tooth Surface Hardness | 58 – 62 HRC | Core Hardness | 30 – 42 HRC |
| Case Depth (Effective) | 0.6 – 1.2 mm | Gear Accuracy Grade | DIN 7 / ISO 7 (Precision Grinding) |
| Module Range | 1.5 – 3.0 mm | Number of Splines (Main Shaft) | 6 / 8 / 10 / 13 / 17 (depending on model) |
| Number of Splines (Countershaft) | 6 / 8 / 10 / 13 / 17 (depending on model) | Spline Involute Standard | JIS / DIN / ANSI (customizable) |
| Main Shaft Diameter | 15 – 25 mm | Countershaft Diameter | 15 – 25 mm |
| Overall Length (Main Shaft) | 120 – 220 mm | Overall Length (Countershaft) | 120 – 220 mm |
| Number of Gears | 4 / 5 / 6 (depending on model) | Bearing Journal Tolerance | h6 / js6 |
| Surface Finish (Journals) | Ra ≤ 0.4 µm | Applicable Displacement | 100cc – 250cc |
| Quality Certification | ISO 9001:2015 | Warranty | 12 months |
| Origin | China | | |
