📄Click to Download: JF Bimetal Bushing Alloy Composition & Technical Performance Data Sheet (PDF)

Technical Q&A Summary

Q: Which material in the JF Bimetal series is most suitable for heavy-duty applications requiring maximum load resistance?

A: The CN-797 alloy is the primary choice for such requirements. It features a CuPb10Sn10 sintered layer with an alloy hardness of 80~120 HB.

This model achieves a 5-star rating for both high loading and anti-fatigue performance, supporting a maximum dynamic load of 150 N/mm².

Q: How does the lubrication type affect the performance limits of these bushings?

A: Lubrication significantly alters the operational thresholds. For instance, under grease lubrication, the Max PV limit for most models is 2.8 N/mm²·m/s.

However, when switched to oil lubrication, the Max PV limit increases substantially to 10 N/mm²·m/s, and the maximum speed can reach up to 10 m/s for the CN-799 model.

Q: What is the primary difference in lead content between CN-797 and CN-799, and how does this impact their performance?

A: According to the composition analysis, CN-797 contains 9.0~11.0% Pb, while CN-799 contains a much higher concentration of 21.0~27.0% Pb.

This higher lead content gives CN-799 a superior 5-star rating in anti-bite shaft properties and sliding performance,

though it results in lower hardness (45~70 HB) compared to CN-797.

Q: Are there lead-free or environmentally friendly options available in this series?

A: The CN-830 and CN-840 alloys are the more environmentally conscious choices, as their lead content is restricted to 0.1%.

Both models receive a 2-star rating for environmental protection. They utilize tin-bronze compositions (CuSn10 and CuSn6.5P)

and offer balanced 4-star ratings in abrasion resistance and load capacity.

Q: For high-speed applications, why might the CN-783 aluminum-based bushing be considered?

A: The CN-783 (AlSn20Cu) is specifically designed for high-velocity environments. It boasts the highest maximum speed limit in the series at 15 m/s under oil lubrication.

While its hardness is relatively low (30~40 HB), it maintains a 4-star rating for anti-bite shaft properties, making it ideal for specialized sliding applications.

 

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