durable high quality excavator parts hydraulic lift cylinder assembly
USD $1 - $1,000 /Piece
Min.Order:1 Piece
Wuxi Beiyi Excavator Parts Factory
China manufacturer durable high quality excavator parts hydraulic lift cylinder assembly
Material | 45# high grade carbon steel or 40CR |
Tempering hardness | HB240-260 |
The depth of the high frequency | 2mm-3mm |
High frequency hardness | HRC55°±2° |
Chrome plating thickness | 0.03mm-0.06mm |
Chromium layer hardness | HV800-1000vpn |
Straightness | ≤0.08mm/m |
Surface roughness | Ra0.03um- Ra0.06um |
Outside diameter tolerance | f7 |
Kind of steel | 45# | Tensile strength N/mm | ≥647 |
Linearity | 0.3-1/1000 | Specific elongation | ≥4 |
Precision of size | HB |
| 207 |
Roughness of inner hole | 0.4-0.8 |
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