Double row Bicycle wheel bearings 21034 CCK / CC spherical roller

Quick Detail:

1. Structure:spherical roller

2. Type: roller

3. Brand Name: UMT, NTN, NSK, TIMKEN, KOYO

4. Bore Size: 20 mm

5. Outside Diameter: 52 mm

6. Model Number: 21304cck

7. Precision Rating: ABEC-1/ P0, ABEC-3/P6, ABEC-5/P5, ABEC-7/P4

8. Seals Type: open

9. Number of Row: Double Row

10. Place of Origin: Japan

11. Width: 15mm ball bearing

12. Net weight: 10-60 kg

13. Material: Chrome steel, Stainless steel

14. Cage: Steel,Brass,Nylon

15. Type: roller, self- aligning roller

16. Clearance: C0,C1,C2,C3,C4,C5 etc.

17. Vibration: V1,V2,V3

18. Service: OEM Service & Good Service

19. Sample available: Yes

20. Manufacturer: Yes

Description:

These bearings have barrel-shaped rollers between the inner ring, which has two raceways, and the outer ring which has one spherical raceway. Since the center of curvature of the outer ring raceway surface coincides with the bearing axis, they are self-aligning in a manner similar to that of self-aligning ball bearings. Therefore, if there is deflection of the shaft or housing or misalignment of their axes, it is automatically corrected so excessive force is not applied to the bearings.
Spherical roller bearings can take, not only heavy radial loads, but also some axial loads in either direction. They have excellent radial load-carrying capacity and are suitable for use where there are heavy or impact loads.

Specifications:

Applications:

These bearings have barrel-shaped rollers between the inner ring, which has two raceways, and the outer ring which has one spherical raceway. Since the center of curvature of the outer ring raceway surface coincides with the bearing axis, they are self-aligning in a manner similar to that of self-aligning ball bearings. Therefore, if there is deflection of the shaft or housing or misalignment of their axes, it is automatically corrected so excessive force is not applied to the bearings.
Spherical roller bearings can take, not only heavy radial loads, but also some axial loads in either direction. They have excellent radial load-carrying capacity and are suitable for use where there are heavy or impact loads.

Competitive Advantage:

1. Quality level: reach the same level as the Japanese and European bearings

2. Tolerance level: ABEC-1 (P0), ABEC-3 (P6)

3. Less coefficient of friction

4. High limiting speed

5. Large size range

6. variations of structure