The Oil Seal 20x37x8 NBR TC (20x37x8 mm) renews the sealing on a 20 mm shaft where grease or oil must stay in and grit must stay out — a typical fitment in small electric motors, power tools, pumps and instrument gearboxes.
Dimensions & specifications
| Inner diameter (shaft) | 20 mm |
| Outer diameter (bore) | 37 mm |
| Width | 8 mm |
| Seal type | TC — double lip, rubber covered, garter spring |
| Material | NBR – Nitrile |
| Temperature range | -30 °C … +100 °C |
About the TC profile
Three features define the TC type: the rubber outer case that fills small bore imperfections, the garter-spring-loaded lip that maintains contact under runout, and the auxiliary lip that acts as a dirt barrier.
Why NBR for this seal
Nitrile rubber (NBR) is the workhorse of oil sealing: fully compatible with mineral oils, lubricating greases and common hydraulic fluids — the media found in most gearboxes and motors. Avoid contact with brake fluid, and keep spares shaded from sunlight.
Don’t worry if your micrometer shows the shaft a few tenths under size — the garter-sprung lip is designed to seal against exactly that condition.
Purchase and delivery notes
- Sold per piece — no minimum order, priced in US dollars.
- Prices exclude any import duties or taxes; if your customs authority charges them, they are the buyer’s responsibility.
- One flat shipping rate worldwide · tracking number by email.
- To confirm this is the right size, see how to measure an oil seal, or send us your dimensions — pre-sale size checks are free.
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