W 6304 Deep groove ball bearing

Deep groove ball bearings have a very wide range of applications and are the most common bearing type used in electric motors, for example. The deep groove ball bearing has a simple structure, is suitable for high rotational speeds, and requires minimal maintenance. These features, along with an affordable price, make deep groove ball bearings the most widely used rolling bearing. Deep groove ball bearings are available in sealed (permanently lubricated) or open designs (unmarked). They are also available made of stainless steel (W prefix designation).

Common suffix designations:
- C2, C3, C4 = clearance class (normal clearance without designation, C1-C2 smaller than normal clearance, C3-C5 larger than normal clearance).
- TN9, M, ML = cage material (steel cage without designation, TN9 = polyamide, M = brass)
- Z, 2Z = metal shield on one side / on both sides
- RSL, RSH, RS1, 2RSL, 2RSH, 2RS1 = rubber seal on one side / on both sides