Self-lubricating sintered bearings deliver high performance under load and offer exceptional wear properties. The porosity of bearings produced through the conventional powdered metal process makes oil impregnation possible, eliminating the need for a supplemental lubrication system. This lifelong lubrication makes sintered bearings a versatile alternative to costly roller bearings.

Keystone manufactures sintered bearings in bronze, diluted bronze, and a proprietary high-graphite iron. We supply flange, spherical and sleeve bearings—with High PV material options that last up to 2.5 times longer than the industry standard for high-speed, high-load applications.

Applications Specifications

• Home appliances

• Automotive transmissions

• Outdoor power equipment

• Fractional horsepower motors

• Up to 3" in diameter

• Up to 4.5" in length

• Less than 1 lb.

• Up to 125,000 PV

We perform all secondary operations for our bearings in-house, oil impregnation, and assembly.