A Timken base number may be available in more than one internal design. A useful replacement check keeps the design, bore, clearance, and lubrication markings with the model and verifies the proposed bearing against the machine duty.
Read the Complete Designation
Keep every letter, number, separator, and marking in the order shown on the
bearing or packaging. Do not translate one brand's suffix into another
brand's suffix without checking what the selected design actually includes.
Marking to capture
What it helps confirm
Complete Timken designation
Copy the full model and suffix from the bearing and packaging; keep all letters and separators.
Cage or internal-design reference
Retain EJ, EM, YMB, or any other design marking because ratings, speed references, or mass can differ.
Bore, clearance, and lubrication
Capture K, C3, C4, W33, and any other bore, clearance, or lubrication-feature marking present.
Arrangement and operating duty
Provide sleeve, fits, shoulders, loads, speed, temperature, lubricant, contamination, and failure history.
Replacement Review Status
Information received
Status
Next check
Model plus complete suffix and clear marking photos
Ready for design comparison
Confirm dimensions, configuration, ratings, application, and availability.
Base model only
Incomplete
Add bore type, clearance, cage, lubrication feature, and suffix.
d / D / B only
Not enough to approve
Identify the original model and operating requirements.
Operating duty or arrangement has changed
Application review required
Provide loads, speed, temperature, fits, lubrication, and drawing details.
Trademark and Review Boundary
TFL Bearing is an independent bearing supplier and sourcing/export partner.
It is not affiliated with or authorized by Timken. The Timken name is used
only to identify the buyer's existing product reference. A review identifies
candidate sourcing options; it is not approval based on a model number alone.
EN
DE 
ES 
TR 
ID 
RU 
JA 
KO 