Date：2025-08-06 Views：1010
Japan began producing powder metallurgy parts as early as the 20th century.
Figures 5-2 to 5-6 display various powder metallurgy parts used in different components of Japanese motorcycles. Table 5-3 lists the technical conditions of some of these parts. Figure 5-7 is a schematic diagram of the powder metallurgy parts listed in Table 5-3.
Figure 5-2 Powder metallurgy parts used in Japanese four-stroke motorcycle engines
Figure 5-3 Powder metallurgy parts used in Japanese two-stroke motorcycle engines
Figure 5-4 Powder metallurgy parts used in pumps for Japanese two-stroke self-lubricating motorcycles
Figure 5-5 Powder metallurgy parts used in Japanese motorcycle clutches
Figure 5-6 Powder metallurgy parts used in the transmission of Japanese small motorcycles
Figure 5-7 Schematic diagram of the powder metallurgy parts listed in Table 5-3
Table 5-3 lists the technical conditions of powder metallurgy parts for motorcycles
Part Name | Material | Density (g/cm3) | Subsequent Treatment | Nitto Material Grade | Notes |
Four-Stroke Engine | |||||
1. Cam Sprocket | Fe-(1~2)Cu-(0.7~1.0)C | 6.9~7.2 | - | 18EPC | Abrasion Resistance |
2. Recoil Gear | Fe-(1~3)Ni-(0.3~0.6)Mo-(0.05~0.25)Mn-(0.15~0.3)C | 7.6~7.8 | Carburizing and Quenching | HN-15 | Powder Forging Impact Strength, Abrasion Resistance |
3. Tensioning Device Sprocket | Fe-(1~2)Cu-(0.7~1.0)C | 6.6~6.8 | - | 18EPC | Abrasion Resistance |
4. Starter Reducing Gear (Inner) | Fe-(1~2)Cu-(0.4~0.7)C | 6.9~7.2 | Carburizing and Quenching | 14EPC | Abrasion Resistance |
5. Starter Reducing Gear (Outer) | Fe-(1~2)Cu-(0.4~0.7)C | 6.6~6.9 | - | 14EPC | - |
6. Primary Drive Gear | Fe-(1~3)Ni-(0.3~0.6)Mo-(0.05~0.25)Mn-(0.15~0.3)C | 7.6~7.8 | Carburizing and Quenching | HN-15 | Powder Forging, Abrasion Resistance, Impact Strength |
7. Oil Guide Tube | Fe-(1~2)Cu-(0.4~0.7)C | 6.6~6.9 | Carburizing and Quenching | 14EPC | Sliding Properties |
8. Primary Driven Gear | Fe-(1~3)Cu-(2~4)Ni-(0.3~0.6)C | 6.9~7.2 | High-Frequency Quenching | ENK | Abrasion Resistance, Impact Strength, Bending Strength |
50cc Motorcycle Engine |
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9. Timing Sprocket | Fe-(1~2)Cu-(0.7~1.0)C | 6.6~6.9 | - | 18EPC | Abrasion Resistance |
10. Starter Sprocket (1) | Fe-(1~2)Cu-(0.7~1.0)C | 6.6~6.9 | - | 18EPC | Abrasion Resistance, Impact Strength |
11. Starter Sprocket (2) | Fe-(2~4)Ni-(0.5~1.0)Mn-(0.2~0.4)C | 6.9~7.2 | Carburizing and Quenching | EN | Abrasion Resistance, Surface Strength |
12. Main Shaft Rear Gear | Fe-(2~4)Ni-(0.5~1.0)Mn-(0.2~0.4)C | 6.9~7.2 | Carburizing and Quenching | EN | Abrasion Resistance, Bending Strength |
13. Main Shaft Second Gear | Fe-(2~4)Ni-(0.5~1.0)Mn-(0.2~0.4)C | 6.9~7.2 | Carburizing and Quenching | EN | Abrasion Resistance, Bending Strength |
14. Counter Shaft Second, Front Gear | Fe-(2~4)Ni-(0.5~1.0)Mn-(0.2~0.4)C | 6.9~7.2 | Carburizing and Quenching | EN | Abrasion Resistance, Bending Strength |
15. Counter Shaft First Gear | Fe-(2~4)Ni-(0.5~1.0)Mn-(0.2~0.4)C | 6.9~7.2 | Carburizing and Quenching | EN | Abrasion Resistance, Bending Strength |
Two-Stroke Engine |
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16. Valve Core | Fe-(1~2)Cu-(0.4~0.7)C | 6.3~6.6 | Heat Treatment | 14EPC | Abrasion Resistance |
17. Spacer | Fe-(1~2)Cu-(0.7~1.0)C | 6.6~6.9 | - | 18EPC | Abrasion Resistance |
18. Roller Keeper | Fe-(1~2)Cu-(0.4~0.7)C | 6.3~6.6 | Steam Treatment | 14EPC | Abrasion Resistance |
19. Roller | Fe-(1~2)Cu-(0.7~1.0)C | 6.6~6.9 | Steam Treatment | 18EPC | - |
20. Recoil Gear Shaft | Fe-(1~2)Cu-(0.4~0.7)C | 6.6~6.9 | - | 14EPC | - |
21. Shifting Cam Shaft | Fe-(1~2)Cu-(0.4~0.7)C | 6.6~6.9 | - | 14EPC | - |
22. Shifting Cam | Fe-(2~4)Ni-(0.5~1.0)Mn-(0.2~0.4)C | 6.6~7.1 | Carburizing and Quenching | EN | Abrasion Resistance |
Clutch |
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23. Clutch Riser Cam | Fe-(1~2)Cu-(0.4~0.7)C | 6.9~7.2 | Carburizing and Quenching | 14EPC | Abrasion Resistance |
24. Clutch Riser Roller | Fe-(1~2)Cu-(0.4~0.7)C | 6.9~7.2 | High-Frequency Quenching | 14EPC | - |
25. Clutch Riser Shaft | Fe-(1~2)Cu-(0.4~0.7)C | 6.6~6.9 | Carburizing and Quenching | 14EPC | - |
Pump |
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26. Adjustable Pulley | Fe-(1~2)Cu-(0.4~0.7)C | 6.3~6.6 | Steam Treatment | 14EPC | Abrasion Resistance |
27. Plunger Cam | Fe-(1~2)Cu-(0.4~0.7)C | 6.3~6.6 | Full Chemical Plating, Ni-P | 14EPC | Abrasion Resistance |
28. Turbine | Fe-(1~2)Cu-(0.4~0.7)C | 6.3~6.6 | Steam Treatment | 14EPC | - |
Figure 5-8 shows some powder metallurgy parts for motorcycles. Table 5-4 lists the technical conditions of the powder metallurgy parts shown in Figure 5-8.
Figure 5-8 Some powder metallurgy parts for motorcycles
Table 5-4 Technical Conditions of the Powder Metallurgy Parts for Motorcycles Shown in Figure 5-8
Part Name | Material | Density (g/cm3) | Subsequent Treatment | Required Properties |
1. Clutch Hub | Fe-2.0Cu-0.7C | 6.7~7.0 | Carburizing and Quenching | Wear Resistance |
2. Outer Transmission Gear | Fe-2.0Cu-0.7C | 6.7~7.0 | Carburizing and Quenching | Wear Resistance |
3. Roller | Fe-2.0Cu | 7.0~7.4 | Carburizing and Quenching | Wear Resistance |
4. Reaction Spring Bushing | Fe-2.0Cu-0.7C | 6.7~7.0 | - | Impact Strength |
5. Disc Bushing | CD-2 | 6.5~7.0 | - | Compressive Resistance, Wear Resistance |
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