SKF 6218-2Z Metal Shielded Single Row Deep Groove Ball Bearing 90x160x33mm

The SKF 6218-2Z double-shielded deep groove ball bearing is engineered for substantial rotating assemblies requiring a 90mm bore, 160mm outside diameter and 30mm width. Its single row construction carries predominantly radial loads while also accommodating axial forces in either direction within the bearing's rated capacity. SKF catalogue values include a basic dynamic load rating of 101kN and a basic static load rating of 73.5kN, making it suitable for consideration in motor drives, mechanical transmissions and other heavily loaded shaft arrangements. The 62 series provides a useful balance between load capacity and installation dimensions, while its deep groove raceway design supports stable rotation when appropriately mounted and lubricated.

The 2Z designation identifies steel shields on both sides, rather than rubber contact seals. These non-contact shields help retain the grease fill and discourage larger particles from entering, with lower sealing friction than contacting rubber seals. They do not provide the same moisture and fine-dust exclusion as a 2RS1 contact-sealed design, so the surrounding operating environment matters. SKF catalogue data lists a 4,300rpm limiting speed and 8,500rpm reference speed, which serve different purposes and should not be treated as interchangeable operating limits. The bearing uses normal (CN) radial internal clearance and a pressed steel cage. When replacing an existing bearing, confirm whether normal or C3 clearance is required, check the shaft and housing fits, and ensure that mounting forces are transmitted through the ring being fitted rather than the rolling elements.

Typical Applications:

Large industrial electric motor assemblies

Industrial fan and ventilation drive shafts

Centrifugal pumps and circulation systems

Gearboxes and power transmission equipment

Enclosed conveyor and material handling drives