SKF 627-2Z/C3 Metal Shielded Single Row Deep Groove Ball Bearing 7x22x7mm

The SKF 627-2Z/C3 shielded miniature deep groove ball bearing combines compact dimensions with a design suited to relatively high rotational speeds. Its 7mm bore, 22mm outside diameter and 7mm width accommodate small shafts while providing more radial section than thinner miniature bearing series. The single row deep groove raceways support predominantly radial loads together with axial forces in either direction, subject to the bearing's rated capacity. SKF specifies a basic dynamic load rating of 3.45kN and a basic static load rating of 1.37kN, providing useful figures for assessing fatigue life and load suitability. The C3 clearance designation indicates greater internal radial clearance than a normal-clearance bearing, helping accommodate clearance reduction caused by mounting fits and operating temperatures when specified by the equipment designer.

The 2Z designation identifies a metal shield on each side of the bearing. Unlike rubber contact seals, these non-contact shields do not rub continuously against the inner ring, helping reduce friction and heat generation during higher-speed operation. They retain factory grease and provide protection against larger particles, although they offer less resistance to water and fine contamination than contact seals. SKF lists a 36,000rpm limiting speed and a 70,000rpm reference speed; these are distinct catalogue figures, not interchangeable operating limits. The bearing features a sheet metal cage and requires no routine relubrication provision. When replacing an existing bearing, check the complete 627-2Z/C3 designation because both the shield arrangement and increased internal clearance can affect suitability.

Typical Applications:

Small electric motors and miniature drive assemblies

Compact industrial fans and ventilation units

Precision automation and positioning equipment

Miniature pulleys and mechanical transmission mechanisms

Light-duty high-speed rotating shaft supports