Deep Groove Ball Bearings SKF 6312 -2Z/C3

The SKF 6312 -2Z/C3 deep groove ball bearing, with dimensions of 60x130x31 mm, non-contacting end shields and C3 clearance, offers low-friction operation at higher operating temperatures.

The 6312 -2Z/C3 deep groove ball bearing is a single-row radial ball bearing with an outer diameter of 130 mm, a bore of 60 mm and a width of 31 mm. Manufactured from standard 100Cr6 rolling-element bearing steel, the design primarily accommodates radial forces and moderate axial forces in both directions. A sheet steel cage guides the rolling elements evenly into the deep raceways. The SKF brand covers an operating temperature range from –20 to +120 degrees Celsius.

What is the 6312-2Z/C3 deep-groove ball bearing suitable for in operation?

It is primarily used in rotating shafts and drives with cylindrical bearing seats that are subject to uniform radial loads. The metal shields on both sides (2Z) prevent coarse dirt particles from entering the interior directly, whilst the lubricant remains within the bearing chamber. As the cover plates operate without contact, no additional friction is generated. This design is particularly suitable where high speeds are required and basic protection against solid particles is sufficient.

What does the increased radial clearance C3 mean for this SKF bearing?

The suffix combination C3 indicates a slightly increased radial bearing clearance compared with the standard version. This increased clearance between the balls and raceways compensates for thermal expansion caused by the shaft heating up or tight mounting fits. Without this reserve, the operating clearance could be reduced to an impermissible level, leading to increased friction. With tolerance class P0 (ABEC 1) and an outer ring without a flange, the rolling bearing meets the standard requirements for direct housing mounting.