A 30 × 40 × 7 mm TC rotary shaft seal in NBR – Nitrile — the Oil Seal 30x40x7 NBR TC keeps lubricant in and contamination out on 30 mm shafts, a common size in electric motors, gearboxes, pumps and agricultural machinery.
Specifications
| Inner diameter (shaft) | 30 mm |
| Outer diameter (bore) | 40 mm |
| Width | 7 mm |
| Seal type | TC — double lip, rubber covered, garter spring |
| Material | NBR – Nitrile |
| Temperature range | -30 °C … +100 °C |
About the TC profile
A TC seal does two jobs at once. The spring-loaded primary lip keeps oil or grease inside; the smaller auxiliary dust lip keeps dirt and splash away from the sealing edge. The rubber-coated outer diameter seals the bore without additional sealant and tolerates minor bore imperfections.
Material: NBR – Nitrile
NBR (Nitrile) is the standard compound for general industrial sealing. It handles mineral oils, greases and hydraulic fluids, which is why it is the default choice in gearboxes, electric motors and pumps. Keep it away from brake fluid, and store spare seals out of direct sunlight.
Between two listed sizes? Send us your shaft and bore measurements before ordering and we will confirm the right one.
Ordering & delivery
- 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.
- Not sure 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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