Back up Roll Bearing NNCF112684
(Three-row full complement cylindrical roller bearing)
The backup roll bearing NNCF112684 is a type of three-row cylindrical roller bearing, full complement, without a cage, but with an external retaining ring and middle retaining ring.
Bearing Type: Three-row cylindrical roller bearing (full complement) NNCF112684;
Application: multi-roll mills, backup roll bearing (backing bearing)
Inner Diameter: 55mm
Outer Diameter: 130mm
Height: 84mm
Inner ring: 1 piece
Outer ring: 1 piece
Middle retaining ring: 2 pieces
External retaining ring: 2 pieces
Roller: cylindrical roller, 3 row
Sorting: 6 pcs in a group
Accuracy: ISO P4
Note: The variation between two bearing next to each other on the shaft should not exceed 0.003. The variation of bearing section heights should not exceed 0.004 on the shaft.
Backup roll bearing is a rolling bearing with a particularly thick-walled outer ring. It is mounted on a stationary shaft as a support roller in groups. The pressure on the work roll is transferred to the support roll through the intermediate roll and transmitted to the frame through the saddle system. It is generally used in multi-roll cold rolling mill equipment, but can also be used on other occasions, such as straightening machine.
The backing bearing is a multi-row cylindrical roller bearing, and the accuracy required by the bearing itself is very high, especially the cross-sectional height (T value) from the inner diameter to the outer diameter after eliminating radial clearance is particularly important. Control within 0.005mm, so the precision of bearing parts must be very high.
Backup roll bearings (backing bearings) are designed in a variety of structural forms to suit specific working conditions. Its main structural form is double-row or triple-row cylindrical roller bearings, with cage or full complement (without cage). Some types of backing bearings have non-contact seals on both sides. Compared with backup roll bearings with ribs and movable ribs on the outer ring, the advantages of backup roll bearings without ribs and movable ribs on the outer ring are simple to set the shape and high radial bearing capacity. However, because this kind of backup roll bearing cannot bear axial load by itself, it is necessary to use copper or engineering plastic thrust washers to support the outer ring end face, and the washer is installed between the outer ring end face and the saddle.
Hot Tags: back up roll bearing nncf112684 (three row full complement cylindrical roller bearing), China, manufacturers, factory, customized, for sale, Bearing Components