Date：2025-08-05 Views：1004
Powder metallurgy parts play a crucial role in motorcycle production as a type of basic component. As early as the early 1990s, motorcycles in China used dozens of powder metallurgy parts, which were widely applied in engines and frames. After long - term production and use, these parts proved to have stable performance and processes, making significant contributions to material - saving, energy - saving, and cost reduction in motorcycle production. Table 5-1 lists some examples of powder metallurgy parts used in domestically - produced motorcycles in the mid - 1990s.
Table 5-1 Examples of Powder Metallurgy Parts in Domestic Motorcycles in the Mid-1990s
Part Name | Part Drawing No. | Material | Density (g/cm3) | Technical Standard | Application Model | Material of Same Part in Japan |
1. Oil Pump Bushing | 12501214 | Fe-<1.0C_a | 5.7~6.2 | GB 2688——FZ 1260 | NF125 | Powder Metallurgy |
2. Bushing | 12501234 | Fe-<1.0C_a | 5.7~6.2 | GB 2688——FZ 1260 | NF125 | Powder Metallurgy |
3. Spacer | 12501409 | Fe-(0.7~1.0)C_combine | >6.5 | JB 2797, FTG 90-25 | NF125 | Powder Metallurgy |
4. Control Cam | 12502120 | Fe-<1.0C_a | 5.7~6.2 | GB 2688——81, FZ 1260 | NF125 | Powder Metallurgy |
5. Plunger Cam | 12502126 | Fe-<1.0C_a | 5.7~6.2 | GB 2688——81, FZ 1260 | NF125 | Powder Metallurgy |
6. Water Pump Bushing | 1250SS10104 | Fe-<1.0C_a | 5.7~6.2 | GB 2688——81, FZ 1260 | Water-cooled NF125 | —— |
7. Gear | 12502108 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | NF125 | Powder Metallurgy |
8. Gear | IKL02108 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | IKL125 | Powder Metallurgy |
9. Upper Oil Pump Outer Rotor | 25009006 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | NF250 | Powder Metallurgy |
10. Upper Oil Pump Installation Seat | 25009033 | Fe-(0.7~1.0)C_combine | >6.5 | JB 2797, FTG 90-25 | NF250 | —— |
11. Lower Oil Pump Installation Seat | 25009034 | Fe-(0.7~1.0)C_combine | >6.5 | JB 2797, FTG 90-25 | NF250 | —— |
12. Intake Valve Seat | 25001222 | Fe-Cu-Mo-C |
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| NF250 | Powder Metallurgy |
13. Exhaust Valve Seat | 25001223 | Fe-Cu-Mo-Co-Ni-C |
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| NF250 | Powder Metallurgy |
14. Intake Valve Guide | 25001224 | EB-4 (Japanese grade) |
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| NF250 | Bronze |
15. Exhaust Valve Guide | 25001225 | EB-4 (Japanese grade) | NF250 | Bronze | ||
16. Positioning Plate | 25004306 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | NF250 | Powder Metallurgy |
17. Lower Oil Pump Inner Rotor | 25009003 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | NF250 | Powder Metallurgy |
18. Lower Oil Pump Outer Rotor | 25009004 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | NF250 | Powder Metallurgy |
19. Upper Oil Pump Inner Rotor | 25009005 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | NF250 | Powder Metallurgy |
20. Electric Starter Valve | 75DJ1191B | Fe-(0.7~1.0)C_combine | >6.5 | JB 2797, FTG 90-25 | 750 | Steel |
21. Electric Starter Pressure Block | 75DJ1610B | Fe-(0.7~1.0)C_combine | >6.5 | JB 2797, FTG 90-25 | 750 | —— |
22. Rocker Arm Support | 75ED267 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | 750E | —— |
23. Rocker Arm Support | 75F10267 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTG 90-30 | 750, 650 | —— |
24. Intake Valve Guide | 75E0263 | Fe-Cu-C |
| 750, 650 | —— | |
25. Exhaust Valve Guide | 75E0263 | Fe-Cu-C |
| 750, 650 | —— | |
26. Oil Pump Timing Gear | 5009138 | Fe-(0.7~1.0)C_combine | >6.8 | JB 2797, FTC 90-30 | NF50 | Powder Metallurgy |
27. Foot Starter Pinion | 5007124 | Fe-Cu-Ni-C | - | - | NF50 | Powder Metallurgy |
28. Intermediate Gear Set | 5007222 | Cu-C Composite | - | - | NF50 | Powder Metallurgy |
29. Electric Starter Intermediate Gear | 5007223 | Fe-Cu-Ni-C | - | - | NF50 | Powder Metallurgy |
30. Connecting Rod Bushing | 5007114 | Fe-Cu-C | - | - | NF50 | Powder Metallurgy |
31. Main Gear Right Bronze Sleeve | 5004112 | Cu-Sn-S-C | - | - | NF50 | Powder Metallurgy |
32. Intake Valve Seat Ring | 75E0269A | Fe-Cu-Ni-Co-Mo | - | - | Yangtze 750 | Powder Metallurgy |
33. Exhaust Valve Seat Ring | 75E0270A | Fe-Cu-Ni-Co-Mo | - | - | Yangtze 750 | Powder Metallurgy |
34. Connecting Rod Seat | C12502029 | Fe-(0.7~1.0)C Alloy | >6.5 | JB 2797, FTG 90-25 | NF125 | Powder Metallurgy |
35. Ring | C12302032 | Fe-(0.7~1.0)C Alloy | >6.5 | JB 2797, FTG 90-25 | NF125 | Powder Metallurgy |
36. Bushing | C12502033 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | NF125 | Powder Metallurgy |
37. Gear Ring | C12502034 | Fe-(0.7~1.0)C Alloy | >6.5 | JB 2797, FTG 90-25 | NF125 | Powder Metallurgy |
38. Piston | C12502039 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | NF125 | Powder Metallurgy |
39. Piston | C12511008 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | NF125 | Powder Metallurgy |
40. Guide Sleeve | C12511011 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | NF125 | Powder Metallurgy |
41. Check Valve Seat | 12511020 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | NF125 | Powder Metallurgy |
42. Bushing | 2C-C12502033 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | 2C-NF125 | —— |
43. Gear Ring | 2C-C12502034 | Fe-(0.7~1.0)C Alloy | >6.5 | JB 2797, FTG 90-25 | 2C-NF125 | Powder Metallurgy |
44. Seat | 2C-C12502031 | Fe-(0.7~1.0)C Alloy | >6.8 | JB 2797, FTG 90-30 | 2C-NF125 | Powder Metallurgy |
In the mid - 1990s, 18 motorcycle manufacturers in China had established technical cooperation or joint ventures with Japanese manufacturers. Therefore, the powder metallurgy parts listed in Table 5 - 1 also reflect some of the parts used in Japanese motorcycle production at that time. These parts were of low and medium density and had relatively simple shapes.
In the 1990s, there were 9 motorcycle manufacturers in Taiwan, China, with a production of 1.5 million units in 1993. Domestic sales reached over 1.1 million units, and exports were around 0.4 million units. With a large motorcycle production and ownership, the application of powder metallurgy parts in motorcycles was highly valued in Taiwan. Table 5 - 2 lists some powder metallurgy parts used in motorcycles produced in Taiwan at that time.
Table 5-2 Some Motorcycle Powder Metallurgy Parts Produced in Taiwan at That Time
Part Name | Unit Mass (g) | Material | Density(g/cm3) | Hardness | Notes |
1. Clutch Lifter Roller | 11 | Fe-2.0Cu-0.7C | 6.7-7.0 | 35-51HRC | SMF4040 |
2. Clutch Center Roller | 11 | Iron-based: O₃n-AQ | HRA Above 60 | Compressive Strength: 637MPa | |
3. Kick Starter Buffer | 8 | Fe-2.0Cu-0.7C | 6.7-7.0 | HRA Above 60 | SMF4040 |
4. Driving Gear B | 620 | Fe-Ni-Cu Alloy | 7.0±0.1 | 68-80HRB | Teeth Nitrided |
5. Flywheel | 125 | Fe-2.0Cu-0.7C | 6.7-7.0 | 70-80HRA | Through Oil Quenching and Polish Treatment |
6. Primary Driven Gear | 600 | Fe-2.0Cu-0.7C | 6.7-7.0 | HB 102 | Through Oil Quenching and Polish Treatment |
7. Camshaft Inner Race | 15 | 20CrMnTi-55 | Above 6.3 | HRB Above 40 | Set |
8. Camshaft Outer Race | 30 | 20CrMnTi-55 | Above 6.3 | HRB Above 40 | Set |
9. Flywheel Roller | 11 | Iron Matrix | 25-35HRC | CBI100 | |
10. Clutch Arm Roller | 20 | Iron Matrix | 25-35HRC | CSM90 | |
11. Bushing (17.5mm) | 16 | Fe-(1-3)Cu-(0.2-1.0)C | 5.9 | Compressive Strength: Above 294MPa PC50 | |
12. Timing Sprocket (15T) | 20 | Fe-(1-2)Cu-(0.7-1.1)C | Above 6.6 | 45-50HRB | PC50 |
13. Starter Sprocket (29T) | 160 | Fe=(2-4)Ni-(0.5-1.0)Mn-(0.2-0.4)C | 6.9-7.2 | HRA Above 63 | Through Oil Quenching, PC50 |
14. Shift Cam | 5 | Iron Matrix, Oily | PC50, 2 per Unit | ||
15. Crankshaft Bushing | 48.5 | Iron Matrix | 90-200HRV | ||
16. Crankshaft Bushing | 48.5 | Iron Matrix | |||
17. Connecting Rod Bushing | 10 | Iron Matrix, Oily | |||
18. Spacer | 15 | Iron Matrix | 3 per Unit | ||
19. Spacer | 30 | Iron Matrix | Set | ||
20. Spacer | 25 | Iron Matrix | Set | ||
21. Air Guide Pipe | 15 | Iron Matrix, Oily | Set | ||
22. Clutch Separation Arm | 10 | Iron Matrix | Set | ||
23. Bushing | 13 | Bronze | 50mL, Oil-free | ||
24. Brake Block | 5 | Cast Iron | 90mL, 150mL | ||
25. Shaft | 18 | Iron Matrix | 150mL | ||
26. Rear Arm Bushing | 33 | Iron Matrix, Oil No. 200 | 2 per Unit, With Bellows | ||
27. Oil Seal | 15 | Iron Matrix | 2 per Unit, With Gasket, Spacer, Oil Seal, Gear Shift Cam | ||
28. Front Fork Oil Plug | 45 | Iron Matrix |
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29. Front Fork Guide Pipe | 25 | Iron Matrix |
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30. Front Fork Dust Cover | 25 | Iron Matrix |
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31. Rear Shock Absorber Spring Guide | 20 | Iron Matrix |
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