Plummer Block Features

Plummer block has many features and is available in various models. A wide selection of mounted units is offered to fit virtually any application.

1 Supreme load capacity and accuracy Plummer block feature an internal structure identical to single row deep groove ball bearings and can bear significant radial load and a great deal of axial load in both directions. The hardened steel balls exhibit a high degree of “roundness,” and the races are highly polished to accommodate a smooth ride at a wide range of speeds.

2 Rational self-aligning mechanism and optimal fit Plummer block have the special ability to self-align inside the housing because of the spherical shape of the outer diameter of the bearing insert and the concave shape of the inner diameter of the housing into which it fits.

This design allows the bearing unit to self-adjust for shaft deviation and reduces the abnormal bearing load.

Table 2.2 Housing type code

Therefore, the original rated life of the bearing can be guaranteed. Since the spherical outside surface of the bearing is precision ground, and the spherical bore of the housing is machined by a boring machine with great accuracy, optimal fitting of the bearing and the housing can be obtained and superior aligning performance. The allowable aligning angle of standard ball bearing units is 3º, while units with covers are 1º.

3 Superior sealing performance Plummer block efficiently prevents grease from leaking out of the bearing’s interior and performs extremely well at keeping contaminants, such as dust and water, from entering. This is achieved by installing the seal to the bearing’s outer ring and installing the slinger to the inner ring of the bearing.

4. Simple lubrication
Plummer block is tapped to accept a grease fitting, which is also supplied with every mounted unit. Bearings are pre-lubricated at the factory and do not require additional grease upon installation. When operating in excessively moist, dusty, or hot environments, it is recommended that grease be supplied at regular intervals.

If appropriately maintained, the rated life of the bearing can be extended.
Plummer block Grease to be sealed in early bearing grease use are manufactured to accommodate a wide range of operating conditions.

Since any abnormal load on the bearing is eliminated by the housing, the bearing’s life can be extended. A Granular material baking finish coating (powder coating) helps resist corrosion and protect the housing surface for an extended period.

Original solid base pillow block housings seat better and produce a more stable mounting configuration that significantly reduces vibration.

Plummer blocks can be used in power generation (coal), mining, aggregate, cement, metals, pulp, paper, forestry operations, water treatment, and food processing industries. Applications include warehousing, conveyors, bulk material handling, and industrial fans and blowers.

Plummer Block Features PDF