Deep groove ball bearings are non-separable and require little attention or maintenance in service, capable of operating at high speeds and are widely used radial bearings. The inner and outer ring of single row deep groove ball bearings have a deep groove raceway, the bearings are mainly used to carry radial loads and a part of axial loads in two directions. This kind of bearing can carry much heavy axial loads after the increase of radial clearance, thus, it can take the place of high speed angular contact ball bearings.
Deep groove ball bearing have various types in structure, beside open type bearings, shield or seals at both side can also be provided
Characteristic of deep groove ball bearing:
1. Seal form: open style, Z, ZZ, RS, 2RS, 2RZ
2. Bearing stop ring: N NR
3. Class of precision: ABEC-1, ABEC-3, ABEC-5, ABEC-7Ã?Â
4. Vibration rank: V1, V2, V3, V4Ã?Â
5. Noise rank: Z1 Z2 Z3 Z4.
6. Internal Clearance code: C0, C2, C3, C4, C5
7. Bearing material: bearing steel (9Cr18), stainless steel (AISI440C, AISI304, and AISI316), ceramics
8. Keeper: stainless steel, PTFE, nylon
9. Bearing ferrule and ball hardness: 59 - 63HRC
Tapered roller bearings have tapered inner and outer ring raceways and  tapered rollers and cage which are applied in combination of radial and axial (thrust) loads. The non-separable inner ring and roller assembly is called the cone, and the outer ring is called the cup. Internal clearance is established during mounting by the axial position of the cone relative to the cup. The bearing could be divided into single row, double-row and four-row taper roller bearings with different structures according to the columns of their rollers.
Tapered roller bearings are used in numerous applications and are capable of high loads and speeds. The predominant use is in any wheel application, where the tapered roller bearings are normally arranged in back to back pairs where they support axial and radial loads in both directions. Tapered roller bearings are available in a wide array of both inch and metric sizes. Four- row taper roller bearings are used in heavy machine such as cold mill and hot mill etc
