4x9x4 Bearing
Comparing Ball Bearings and Roller Bearings
The most common types of bearings you’ll find in a motorcycle are ball bearings and roller bearings.
Ball bearings use spherical balls in between the inner and outer rings to reduce friction. The contact points between the balls and the rings are very small which allows the bearing to spin freely at high RPMs.
Roller bearings use small cylindrical rollers instead of spherical balls to allow the inner and outer rings to spin freely. Using rollers helps spread the weight of heavier loads across a larger surface.
Axial vs. Radial Loads
It’s helpful to understand the two types of loads a bearing will be subjected to during its operation, namely axial loads and radial loads.
- 4 mm x 9 mm x 4 mm NTN 684AX50ZZ deep groove ball bearings
- 52100/Black Oxi
- Max 250°
- 4 mm x 9 mm x 4 mm ZEN F684-2Z deep groove ball bearings
- 3.2813 in
- 8865590091270
- 4 mm x 9 mm x 4 mm ZEN S684-2RS deep groove ball bearings
- Lubrication Fitting
- 3.7500 in
- AST 684H-2RS deep groove ball bearings
- 300 mm
- 192 mm
- 4 mm x 9 mm x 4 mm ZEN 684-2RS deep groove ball bearings
- Lubrication Fitting
- 3.7500 in
- 4 mm x 9 mm x 4 mm FBJ F684ZZ deep groove ball bearings
- 3.2813 in
- 8865590091270
- 4 mm x 9 mm x 4 mm NMB L-940ZZ deep groove ball bearings
- 1.8750 in
- 1.2190 in
- 4 mm x 9 mm x 4 mm ZEN 684-2Z deep groove ball bearings
- 52100/Black Oxi
- Max 250°
- 4 mm x 9 mm x 4 mm NTN W684AX50Z deep groove ball bearings
- 1.8750 in
- 1.2190 in
- 4 mm x 9 mm x 4 mm ISB 638/4-ZZ deep groove ball bearings
- 52100/Black Oxi
- Max 250°