Sandvik 550 267 99 Bearing

The bearing, part 550 267 99, is a rolling-element bearing whose service life depends as much on how it is fitted as on how it is made. Pressing it on or off by the ring that is not tight-fitted pushes the load through the balls or rollers and leaves small dents in the raceway, and those dents later show up as a rhythmic noise and heat long before anything looks wrong from the outside.

Installation force should go through the ring that carries the interference fit, using a sleeve that contacts only that ring, and never through a hammer blow on the opposite face. The seat on the shaft and in the housing should be clean and free of burrs, because a bearing forced onto a damaged seat is distorted before it ever turns. If the bearing replaced shows discoloured or flaking tracks, the cause is worth finding, since a new bearing in the same conditions will follow the same path. Stalroc quotes this Sandvik reference by part number and exports worldwide to mining, quarrying, and drilling contractors.