Metal-Polymer Composite Bearings

JBM-22

Steel Bronze Powder with PVDF/PTFE

PRODUCT OVERVIEW

Features & Benefits

The JBM-22 utilizes a specialized PVDF/PTFE resin formulation that offers superior wear resistance and low friction characteristics. The bearing surface is engineered with lubrication pockets (circular indents) to retain grease, optimizing performance. A key advantage is its machinability; the resin liner can be bored or reamed after press-fitting to achieve tight dimensional tolerances. Compared to standard POM-based materials (like JBM-20), this PVDF composition offers a broader operational range and enhanced performance.

MATERIAL COMPOSITION

Structure

Layer	Material	Thickness	Function
1	PVDF/PTFE	0.30~0.50mm	Offers high wear resistance and low friction. The surface features circular lubrication pockets for grease retention and is machinable post-assembly to achieve precise tolerances.
2	Sintered bronze powder	0.20-0.35mm	Ensures maximum thermal conductivity away from the bearing surface and serves as a mechanical anchor for the resin mixture.
3	Low-carbon steel	Base	Delivers exceptionally high load-carrying capacity and excellent heat dissipation.

SPECIFICATIONS

Technical Data

max load

static 250 N/mm²
very low speed 140 N/mm²
rotating oscillating 70 N/mm²

max pv

3.6 N/mm²*m/s

temperature limit

-50℃ ~ +160℃

friction coefficient

0.03~0.20

max speed

pre lubricated 2 m/s
continuous oiling grease >3 m/s

thermal conductivity

50 W(m*K)⁻¹

coefficient of thermal expansion

11*10⁻⁶*K⁻¹

WHERE IT'S USED

Typical Applications

Construction & Heavy Equipment

The JBM-22 is optimized for harsh operating environments characterized by high loads, elevated temperatures, and potential contamination. It excels in boundary lubrication regimes where continuous oil supply is difficult.

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Agricultural Machinery

Common applications include heavy-duty agricultural machinery, hydraulic piston pumps, and automotive components such as kingpin bushings, where durability and intermittent lubrication capabilities are essential.