Metallic Self-lubricating Bearings

JBM-650GT

Steel Shell Cast Bronze Bearings with Graphite Plugs

PRODUCT OVERVIEW

Features & Benefits

The JBM-650GT combines the high mechanical strength of a steel backing with the self-lubricating properties of a graphite-plugged bronze liner. This design offers an economical solution for low-speed and high-load applications where external lubrication is impractical. It provides excellent resistance to shock loads, reduces the coefficient of friction, and ensures reliable self-lubricating performance.

MATERIAL COMPOSITION

Structure

Layer	Material	Thickness	Function
	Bi-metallic: Steel Shell + Cast Bronze Liner with Graphite	Sintered/Cast Layer on Steel	This bearing features a unique bi-metallic structure consisting of a steel shell backing lined with a cast bronze bearing material. Specially formulated solid lubricants (graphite) are embedded into holes within the bronze liner. The bronze is cast onto the steel using a process that achieves an integral metallurgical structure, significantly increasing load-carrying capacity while reducing material costs compared to solid bronze bearings.

SPECIFICATIONS

Technical Data

max load

static 250 N/mm²
dynamic 100 N/mm²

max speed

dry 0.5 m/s
lubricated 1.0 m/s

max pv

3.25 N/mm²*m/s

bronze alloy hardness

HB > 210

interlay bonding strength

150 N/mm²

temperature limit

-100℃ ~ +300℃

friction coefficient

0.03~0.20

thermal conductivity

60 W(m*K)⁻¹

coefficient of thermal expansion

19*10⁻⁶*K⁻¹

WHERE IT'S USED

Typical Applications

Construction & Heavy Equipment

The JBM-650GT is widely used in high-temperature and high-load environments with low speeds, such as continuous casting machinery in steel plants and mineral/mining machinery.

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Oil & Gas

It is also applicable in injection molding machinery and dockside machinery, offering a robust and cost-effective alternative to solid bronze bearings.