Schaeffler FAG SNS plummer block housings

The latest FAG plummer block housings from Schaeffler are large-size bearing housings, engineered to increase the service life of fitted spherical roller bearings by up to 50% compared to conventional plummer block housings.

Their advances — including increased strength and shock resistance due to the use of (EN-GJS-400) spheroidal graphite cast iron — make the SNS suitable for the diverse range of applications where spherical roller bearings are widely used, including machinery operating in aggressive environments.

The plummer blocks — for shafts from 115 to 530 mm diameter — are designed to distribute the load on the bearings more effectively than previous and alternative housings. The design is a split plummer block, which allows maintenance to be carried out more efficiently and quickly by providing easier access to the bearing.

Schaeffler can also provide a special split labyrinth seal which facilitates the use of the FAG split spherical roller bearing inside the housing. Four different seal variants, including high-speed labyrinth seals, split labyrinth, clip-in and bolt-on Taconite seals, ensure effective sealing of the SNS housing to protect the bearing from harmful contaminants.

An axial lubrication groove in the upper section of the housing ensures optimum lubricant supply for bearings in every bearing position. The design also integrates good anti-corrosion characteristics and reduced cleaning requirements, due to inclined run-off areas as well as a projecting upper housing section.