Selection of Accuracy
For general applications, Normal Class tolerances are adequate in nearly all cases for satisfactory performance, but for the following applications, bearings having an accuracy class of 5, 4 or higher are more suitable.
| Typical Tolerance Classes for Specific Applications (Reference) |
Bearing Requirement,
Operating Conditions |
Examples of Applications |
Tolerance Classes |
| High running accuracy is required |
VCR Drum Spindles
Magnetic Disk Spindles for Computers
Machine-Tool Main Spindles
Rotary Printing Presses
Rotary Tables of Vertical
Presses, etc.
Roll Necks of Cold Rolling Mill Backup Rolls
Slewing Bearings for Parabolic Antennas |
P5
P5,P4,P2
P5,P4,P2
P5
P5,P4
Higher than P4
Higher than P4 |
| Extra high speed is required |
Dental Drills
Gyroscopes
High Frequency Spindles
Superchargers
Centrifugal Separators
Main Shafts of Jet Engines |
CLASS 7P,CLASS 5P
CLASS 7P,P4
CLASS 7P,P4
P5,P4
P5,P4
Higher than P4 |
| Low torque and low torque variation are required |
Gyroscope Gimbals
Servomachanisms
Potentiometric Controllers |
CLASS 7P,P4
CLASS 7P,CLASS 5P
CLASS 7P |
|
