What is C4 in bearing?
This is the most common type of bearing, and is the correct choice for the majority of applications. C4 – Refers to “greater than C3 clearance”. Not as common as C3, but often specified in small engine crankshaft bearings.
What is normal bearing clearance?
As a general rule, a ball bearing should have an almost-zero operational clearance, while needle, spherical, cylindrical and CARB toroidal bearings should always have some residual radial operational clearance. Radial clearance is the play between the ball and raceway perpendicular to the bearing axis.
What is mean by C3 clearance in bearing?
Internal clearance being C3 means that the bearing has room for expansion if needed between the races of the bearing, whilst holding the outer ring and moving the inner ring in a radial movement you will detect a little amount of play between the two rings. C3 means the bearing has more clearance than standard.
What is the formula of bearing clearance?
This is the total clearance inside a bearing in the radial direction. Its numerical value can be calculated by subtracting from the diameter of the outer race roller path or ball groove I.D. two times the rolling element diameter and the O.D. size of the inner race roller path or ball groove.
What is C1 bearing clearance?
Internal clearance
| ISO clearance class | SKF designation suffix | Internal clearance |
|---|---|---|
| – | C1 | Smaller than C2 |
| Group 2 | C2 | Smaller than Normal |
| Group N | – | Normal |
| Group 3 | C3 | Greater than Normal |
How many types of bearing clearance are there?
The three types of internal clearance of a ball bearing are radial clearance, axial clearance and moment clearance. Radial internal clearance decreases when a ball bearing is fitted to either a shaft or housing with interference. The fits and temperature affect the radial internal clearance.