Problem this solves
Markings can be partial or unclear. This guide helps you interpret size notation and lip type so you can quote accurately.
How to interpret markings
- 1Photograph both faces of the seal, including any stamps.
- 2Look for ID × OD × width notation (usually in mm).
- 3Translate the numbers into oil seal dimensions: ID × OD × width.
- 4Identify lip type codes such as SC or TC.
- 5Note material hints if present (NBR, FKM/Viton, PTFE).
- 6Confirm direction of rotation if marked.
Common oil seal dimension format
If markings show three numbers like 25 47 7, read them as ID 25 mm × OD 47 mm × width 7 mm.
Common marking patterns (generic examples)
| Marking | Likely meaning | Notes |
|---|---|---|
| 25 47 7 TC | ID 25, OD 47, W 7, TC lip | Metric format |
| 30x52x7 SC | ID 30, OD 52, W 7, SC lip | Sometimes uses x |
| NBR / FKM | Material type | Confirm with media and temp |
| DIN 3760 | Profile standard reference | Helps verify lip type |
Include with your RFQ
- ID × OD × width (mm or inches)
- Lip type (SC/TC/TB) and spring-loaded or not
- Material (NBR/Viton/PTFE) if known
- Quantity and application (pump, gearbox, motor)
- Clear photos of markings and seal face
Related guides: unknown node • unknown node • unknown node