SKF 628/8-2RS1 Rubber Sealed Single Row Deep Groove Ball Bearing 8x16x5mm

The SKF 628/8-2RS1 sealed miniature deep groove ball bearing provides reliable rotational guidance in small assemblies where both radial and axial installation space are limited. Its 8mm bore, 16mm outside diameter and 5mm width suit compact bearing seats that cannot accommodate the larger 608 or 619/8 series. The single row deep groove raceways carry predominantly radial loads and moderate axial forces in either direction, subject to the bearing's rated capacity. SKF specifies a basic dynamic load rating of 1.33kN and a basic static load rating of 0.57kN. These figures are particularly relevant for miniature mechanisms because relatively small changes in applied load can significantly affect calculated bearing life. The exact 628/8 designation should be checked against the original assembly before replacement.

The 2RS1 rubber contact seals provide contact sealing on both sides, helping retain factory-applied grease while reducing the ingress of dust, moisture and small particles. This sealed arrangement is useful for compact equipment where routine relubrication is impractical. SKF lists a limiting speed of 26,000rpm; however, continuous operating suitability also depends on load, temperature and friction generated by the seals. The bearing features normal (CN) radial internal clearance, bearing-steel construction and a sheet metal cage. Its approximate mass of 4g reflects its miniature dimensions. During installation, use appropriately controlled shaft and housing fits, avoid excessive interference and apply mounting force to the ring being fitted to prevent damage to the raceways.

Typical Applications:

Miniature guide rollers and tracking mechanisms

Compact measuring and instrument assemblies

Small automated positioning equipment

Light-duty miniature pulley systems

Precision shaft supports with 5mm-wide bearing seats