Deep Groove Ball Bearing, 6021

Model Number: 6021 Brand Name: NXZ Key Specifications/Special Features: Deep groove ball bearing, 6021Deep groove ball bearings are with the characteristics of simply designed structures, low friction coefficient and high limit rotational speedTheir range of application is very wideThey can mainly carry radial load and certain thrust loadWhen the radial internal clearance increased, the bearings have the functions of angular contact ball bearings that a larger thrust load can also be carriedStructures:Basic type 60000Applications of this type of bearing can be found in situations where there are no special requirements for mounting and sealing

1. With one shield (-Z) on one side or two shields (-2Z) on both sides

Shields are made of steel sheet
Adequate lubricating grease has been put in the deep groove ball bearings with two shields during assembling process and there is no need to clean the bearing or add lubricant as mounting
Noncontact seal and compared with deep groove ball bearings with seals, they have less friction and suitable for applications with high rotational speed requirement

1. With one seal (-RS)on one side or two seals (-2RS)on both sides

Seals are made of rubber with steel sheet reinforcement
Contact sealing that can seal much better but have high friction and low limit rotation speed if the seals contact with the outside of the inner ring, while it is non-contact sealing that has the same limit rotation speed as the basic type Lubricant has been prefilled in the bearing with seals both sides, so there is no need to clean and fill the lubricant as mounting
With snap ring groove on the outer ring (-N)
Snap ring can be used to locate the bearing in the axial direction so that the mounting in the housing is simplified
Cage material
Deep groove ball bearings generally use pressed steel cages or solid cages Phenol resin cage is suitable for application with high limit rotational speed
Permissible tilt angle
Deep groove ball bearings permit tilting angle between the inner ring and outer ring
Details are listed in the Table 1
Tolerance and clearance
Tolerance of deep groove ball bearings is P0 basically
P5, P6, P4 and P2 are available for different application
Radial internal clearance of deep groove ball bearing is as Table 3