Bimetallic Bearings

JBM-820

Steel with Lead-free Bronze Powder

PRODUCT OVERVIEW

Features & Benefits

The JBM-820 is an environmentally friendly bimetallic bearing featuring a steel backing and a sintered lead-free bronze lining (CuSn8Ni). Designed to handle high specific loads, it offers excellent fatigue strength, particularly under dynamic and shock loading conditions. The bearing surface is engineered with indentations or grooves that serve as grease reservoirs, allowing for extended lubrication intervals. It delivers superior performance in oscillating applications and is fully compliant with EC Directive 2000/53/EC regarding end-of-life vehicles.

MATERIAL COMPOSITION

Structure

Layer	Material	Thickness	Function
1	Sintered lead-free bronze powder (CuSn8Ni)	-	A specialized lead-free lining that provides robust bearing performance, high wear resistance, and excellent load-carrying capability.
2	Steel backing	Base	Delivers exceptionally high load-carrying capacity and excellent heat dissipation.

SPECIFICATIONS

Technical Data

max load

static 250 N/mm²
dynamic 140 N/mm²

breaking load

350 N/mm²

max speed lubricated

2.5 m/s

max pv

2.8 N/mm²*m/s

alloy hardness

≥ HB70

temperature limit

-40℃ ~ +250℃

friction coefficient

0.05~0.20

thermal conductivity

60 W(m*K)⁻¹

coefficient of thermal expansion

14*10⁻⁶*K⁻¹

WHERE IT'S USED

Typical Applications

Construction & Heavy Equipment

Optimized for medium-load and medium-speed applications utilizing oil or grease lubrication. It is widely employed in critical components such as motor connecting rod ends, kingpin bushings, and undercarriage rollers.

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Agricultural Machinery

Ideal for hydraulic cylinder rod eyes in construction machinery and spherical joint bearings in agricultural equipment, offering a robust, eco-compliant solution.