Deep Groove Ball Bearings SKF 6310 -2Z/C3

The SKF 6310-2Z/C3 single-row deep-groove ball bearing combines main dimensions of 50 × 110 × 27 mm with sheet metal end shields on both sides and an increased C3 radial clearance.

As a radial deep-groove ball bearing, the design primarily accommodates radial forces as well as moderate axial forces in both directions. SKF manufactures this single-row model from hardened standard roller bearing steel 100Cr6 to tolerance class P0/PN or ABEC 1. A robust sheet steel cage separates and guides the rolling elements evenly within the space between the inner and outer rings. The cylindrical outer ring is manufactured without a groove or flange, which allows for direct installation in suitable housing bores. The design is rated for a temperature range of -20 to +120 degrees.

What function does the 6310 -2Z/C3 deep groove ball bearing fulfil in shaft mountings?

The 6310 -2Z/C3 deep groove ball bearing is suitable for bearing arrangements subject to medium to high radial loads where low-maintenance operation is required. The metal covers on both sides protect the interior from the ingress of coarser dirt particles and help to keep the lubricant within the rolling zone during rotation. As the gap seals operate without contact, no additional frictional resistance is generated, meaning the system can be operated energy-efficiently and without premature heating, even at higher speeds.

Why are C3 bearing clearance and cover plates on both sides crucial?

The C3 designation indicates a slightly increased radial bearing clearance, which is higher than the base value of the standard version. This increased radial clearance is designed to compensate for thermal expansion at operating temperature, as well as for the loss of radial clearance caused by tight fits on the shaft and housing. The cover plates of the 2Z design provide a metal seal on both sides of the bearing, thereby protecting the rolling elements and raceways from contamination whilst keeping the friction level of the design low.