Bronze Wrapped Bearings

JBM-T90

Bronze Wrapped Bearings with Through Holes

PRODUCT OVERVIEW

Features & Benefits

The JBM-T90 improves upon standard bronze wrapped bearings by incorporating a pattern of through-holes across the bearing surface. These holes significantly extend lubrication intervals and service life by acting as large reservoirs for oil or grease. Furthermore, the design allows for the collection of contaminants and abrasive particles within the holes, maintaining a cleaner sliding interface. The bearing retains the high load capacity, excellent chemical resistance, and superior thermal conductivity inherent to CuSn8 bronze, making it ideal for environments with high loads and slow movements.

MATERIAL COMPOSITION

Structure

Layer	Material	Thickness	Function
	Homogenous Bronze (CuSn8)	Wrapped cold formed	A solid, cold-formed bronze structure incorporating strategically dispersed through-holes. These apertures serve as substantial lubricant reservoirs to rapidly establish a film at start-up and reduce running friction. Additionally, they function as collection pockets for dust and wear particles, preventing surface damage.

SPECIFICATIONS

Technical Data

chemical composition

Cu 91.3%
Sn 8.5%
P 0.2%
Pb N/A
Zn N/A

max load

static 120 N/mm²
dynamic 40 N/mm²

max speed lubricated

2.5 m/s

max pv

2.8 N/mm²*m/s

tensile strength

450 N/mm²

hardness

HB 110-150

elongation

40%

temperature limit

-100℃ ~ +200℃

friction coefficient

0.08~0.25

thermal conductivity

58 W(m*K)⁻¹

coefficient of thermal expansion

18.5*10⁻⁶*K⁻¹

WHERE IT'S USED

Typical Applications

Construction & Heavy Equipment

The JBM-T90 is engineered for demanding applications such as hoisting machines, construction vehicles, and agricultural tractors where high static loads and slow oscillatory movements are common.

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Automotive

It is also widely applied in trucks, mineral engines, and machine tools. Its capability to trap debris makes it particularly suitable for environments where dust or particulate contamination is a concern.