Deep Groove Ball Bearings SKF 6311 -2Z

SKF deep groove ball bearing 6311 -2Z: A single-row rolling bearing with a 55 mm bore, 120 mm outer diameter and cover plates on both sides, designed for industrial radial loads.

The 6311-2Z deep groove ball bearing is a single-row radial ball bearing in the SKF Explorer series, designed for demanding rotational applications in industry and trade. With an inner diameter of 55 mm, an outer diameter of 120 mm and a width of 29 mm, the component primarily accommodates radial forces as well as moderate axial forces. Manufactured from standard rolling-element bearing steel 100Cr6 with a robust sheet steel cage, the design is rated for an operating temperature range of –20 to +120 degrees Celsius.

What is the 6311-2Z deep groove ball bearing suitable for in operation?

The rolling bearing is primarily used in rotating shaft systems where radial forces predominate. Typical applications are found in general mechanical engineering at constant speeds and under moderate loads. The outer ring has no flange or groove, allowing the bearing to fit cylindrically into housing bores. Thanks to the covers on both sides, this design is suitable for environments where solid particles need to be kept away from the raceways.

What protection do the -2Z cover plates and the standard bearing clearance provide?

The suffix combination -2Z denotes non-contacting sheet-metal shields on both sides of the bearing. These shields keep out coarse dirt particles without generating additional friction or heat at the contact points. The 6311 -2Z deep-groove ball bearing features standard radial clearance in tolerance class P0/PN (equivalent to ABEC 1). This specification is tailored to standard fits and ensures smooth running in standard applications.