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Technical Clearance
Spherical Roller Bearing Clearance C3 C4
Use this table to prepare a clearance review before RFQ. Clearance should be checked together with fit, speed, temperature, load, vibration, lubrication method, current suffix, and application position.
Clearance Review Table
Class
Typical context
RFQ details to send
CN
Normal operating conditions
Model, application, speed, load.
C3
Higher running temperature or tighter fit
Temperature, shaft fit, housing fit, speed.
C4
High heat, heavy interference, or vibration-sensitive duty
Application, heat range, duty cycle, current failure mode.
Special screen duty
Vibrating screens and shaker equipment
Screen model, RPM, acceleration, cage, current suffix.
Send application, speed, heat, fit, model, and quantity.
RFQ Details for Clearance Review
Send the model, suffix, application, speed, temperature, shaft or housing fit, load, vibration, current failure mode, quantity, and destination for clearance review.
RFQ detail
Example
Why it matters
full bearing model
22222 EK/C3 W33, 22320 CAK/W33, or photo of the full marking
Identifies the series, size group, bore style, clearance reference, and starting point for quotation review.
full suffix / marking
K, K30, C3, C4, W33, CA, CC, MB, 2RS, or full ring marking photo
Suffixes can change bore type, clearance, cage design, lubrication groove, sealing, and replacement risk.
clearance class
CN, C3, C4, C5, or current suffix if the clearance is not separately known
Clearance must be reviewed with shaft fit, temperature, vibration, speed, and failure history.
speed
Operating RPM, variable speed range, or machine nameplate if RPM is unknown
Speed affects lubrication, heat generation, cage suitability, and clearance review.
temperature
Normal running temperature, peak temperature, ambient heat, or steel mill / dryer section context
Temperature influences clearance selection, grease choice, sealing, and relubrication interval.
Send application, speed, temperature, bearing model, shaft fit if known, current clearance suffix, and quantity. TFL Bearing can review the RFQ path after the operating data is clear.
