Spherical Roller Bearings SKF 22330 CCJA/W33VA405

The SKF 22330 CCJA/W33VA405 self-aligning roller bearing, measuring 150 × 320 × 108 mm, is specifically designed for oscillating loads in vibrating screens.

This double-row roller bearing, made from standard bearing steel 100Cr6, withstands high radial loads and compensates for misalignment and shaft deflection during operation. The design is engineered to withstand severe vibrational stresses, such as those encountered in screening processes. The integrated sheet steel cage guides the symmetrical barrel rollers evenly, even during rapid changes in vibration, and keeps friction at the rolling element contact points to a minimum.

What role do bearing clearance and temperature range play in vibrating screens?

During vibratory operation, alternating accelerations generate additional frictional heat, which leads to rapid heating of the inner rings. The significantly increased radial bearing clearance ensures that the bearing does not become stressed during thermal expansion and that the required operating clearance is maintained. The permissible temperature range of -30 to +200 degrees covers both cold starts and high thermal loads.

Why does the CCJA/W33VA405 design feature special tolerances?

To minimise relative movements between the shaft and the bearing rings under vibrational loads, this special design features tighter manufacturing tolerances: the bore is manufactured to tolerance class P5 and the outer ring to P6. This counteracts ring migration and reduces the risk of fretting corrosion. As the outer ring is designed without a groove or lubrication bore, the lubricant is supplied laterally via the bearing housing.