Deep Groove Ball Bearings SKF 6004 -Z/C3

The SKF 6004-Z/C3 deep groove ball bearing, with dimensions of 20x42x12 mm, increased C3 clearance and a single-sided cover plate, offers a precise rolling bearing solution.

The 6004 -Z/C3 deep groove ball bearing is a single-row radial ball bearing made from standard rolling-element steel (100Cr6) in the Explorer performance class. Designed to accommodate predominantly radial and moderate axial loads, this rolling bearing combines a compact design with high running accuracy to tolerance class P5 and dimensional accuracy to P6. A sheet steel cage guides the rolling elements evenly into the deep raceways of the inner and outer rings. The single-sided sheet metal cover protects the interior of the bearing, whilst the open opposite side allows for targeted relubrication within the housing.

For which operating conditions is the 6004 -Z/C3 deep groove ball bearing suitable?

The 6004 -Z/C3 deep-groove ball bearing is primarily used in rotating units and mechanical assemblies with a lubricant supply. Thanks to its permissible temperature range of -20 to +150 degrees, the bearing operates stably even under conditions of increased operating heat. The single-sided Z-cover plate keeps coarse dirt particles out from the outside without generating frictional heat. The open rear side allows lubricant from an oil bath or grease chamber in the machine housing to be fed directly to the raceways.

When is the combination of a Z-cover plate and C3 bearing clearance advisable?

The C3 specification denotes a slightly increased radial bearing clearance. It compensates for thermal expansion caused by heating during operation, as well as the radial constriction resulting from tight fits on the shaft and housing, ensuring that the bearing does not become stressed. The non-contacting Z-cover made of sheet steel generates no frictional torque, unlike abiding seals. This design is suitable for high-speed bearing arrangements where one side of the assembly is already shielded by the surrounding machine housing.