
Metal Challenge #3: Bearings fail due to mounting errors.
Wrong mounting of roll neck bearings might cause damage to the roll neck or the inner ring raceways. The result is failing bearings.
Proper mounting help to avoid roll neck bearing failure
SKF four-row cylindrical and tapered roller bearings are well known for their reliability and long service life in the harsh conditions of the rolling mill. On the occasions that they fail, the root cause is often mistakes that were made during mounting. However, with more than 110 years of experience, SKF can help you significantly reduce the risk of that type of failure.
Lubricate the bearing bore
SKF four-row tapered roller bearings are mounted to the roll neck with a loose fit, but when it is too loose, it can result in significant wear. You can reduce that risk and the risk of roll damage by adding appropriate lubrication to the bearing bore during mounting.
Use bearings optimized for mounting
When installing SKF four-row cylindrical roller bearings, the inner ring is first mounted to the roll neck. After that, the chock with the outer ring and cage-roller sets is mounted onto the inner ring. During this part of the assembly, when the heavy chock with bearing outer ring and rollers is guided onto the inner ring, the side faces of the rollers can easily damage the raceway of the inner ring. There is a substantial risk of generating scratches. To reduce this risk, SKF four-row cylindrical roller bearings have tapered profiles of the contact of the roller side face and flange.