TC 55x78x12mm Rubber Covered Double Lip Oil Seal NBR Crankshaft
Model / SKU: VKEFOT-TC-55-78-12-NBR
This aftermarket TC double lip oil seal 55x78x12mm in NBR for crankshaft sealing.
Tags: 55x78x12mm TC oil seal, crankshaft front seal, rubber covered double lip, NBR black shaft seal, automotive engine seal
Product photos
Technical summary
Product specifications. Refer to the approved drawing for dimensional tolerances and installation requirements.
| Spec | Value |
|---|---|
| Size (mm) | 55x78x12 |
| Material | NBR |
| Structure | TC type rubber covered double lip oil seal with garter spring |
| Size | 55x78x12mm |
Pricing: request a quote (B2B / wholesale).
MOQ / commerce notes: In stock: ships in 1 to 2 days | Not in stock but still in current production: 10 to 15 days | Not in stock and not in production: 25 to 30 days
Product details
This aftermarket TC rubber covered double lip oil seal measures 55mm inner diameter, 78mm outer diameter and 12mm in height, manufactured in black NBR nitrile rubber. The steel reinforcing cage is fully encapsulated in rubber, with a primary sealing lip, an integrated secondary dust lip and a garter spring maintaining uniform radial pressure on the shaft.
Importers, wholesalers, auto repair shops and MRO buyers can submit RFQ with dimension, quantity, destination and working medium for a formal quotation.
Features & Benefits
Fully rubber-covered outer diameter absorbs housing bore irregularities and provides reliable static sealing in aluminum engine housings where a bare metal case could leak.
Double lip design with a garter spring maintains consistent contact pressure on the crankshaft; the primary lip retains engine oil while the secondary lip blocks dust and road contamination.
Black NBR nitrile rubber delivers dependable oil resistance and wear resistance, compatible with engine oils, gear greases and standard hydraulic fluids.
The garter spring compensates for normal lip wear and minor crankshaft run-out, helping maintain sealing performance over the engine service interval.
Standard 55x78x12mm dimensions match common metric TC crankshaft front seal housings used across passenger and light commercial engines.
This is an aftermarket replacement seal, not a genuine OEM part. Always verify shaft diameter, housing bore and application before ordering.
Factory standard options are available for marking and packaging; confirm all requirements on RFQ.
Material & Process
- Sealing lip：NBR (nitrile butadiene rubber), black
- Reinforcement：steel cage fully encapsulated in rubber
- Spring：carbon steel garter spring
Confirm compound grade with RFQ for high-temperature or special fluid applications.
Compatible fluids: engine oil, gear oil, lithium grease, standard hydraulic fluids
Packaging & Delivery
Standard packaging: neutral polybag per piece, packed in export cartons.
Samples and small trial lots are available for stocked sizes; sample freight confirmed on RFQ.
Send an inquiry with size (ID×OD×height in mm), quantity, destination country and duty for a firm lead time.
FAQ
What is a 55x78x12mm TC oil seal used for?
TC 55x78x12mm black NBR rubber covered double lip oil seal is commonly used as a crankshaft front seal for automotive and light diesel engines, as well as in gearboxes, differentials, pumps and motors.
What are the full specifications of this 55x78x12mm oil seal?
Standard size: 55mm inner diameter (shaft), 78mm outer diameter (housing), 12mm height. Material: black NBR nitrile rubber with fully rubber-covered steel cage and garter spring.
Which engines use a 55x78x12mm crankshaft oil seal?
Commonly listed as crankshaft front seal for automotive and light diesel engines; also used in transmissions, differentials and industrial rotating equipment. Verify engine model and housing bore before purchase.
Is this 55x78x12mm TC oil seal a genuine OEM part?
No — it is an aftermarket replacement seal. Always verify dimensions, housing bore and engine application before purchasing.
How to install 55x78x12mm crankshaft oil seal without leakage?
1. Clean crankshaft and housing bore thoroughly to remove burrs and old seal residue. 2. Lubricate lip and shaft with engine oil; do not install dry. 3. Press seal evenly with a proper tool, keeping it perpendicular to the bore. 4. Do not hammer or strike the seal directly. 5. Rotate crankshaft by hand and check for oil leakage.
What is the MOQ and lead time for 55x78x12mm TC oil seals?
This SKU quantity confirmed on quotation. Samples are available for stocked sizes.
What information should I send for an RFQ on this crankshaft oil seal?
Submit ID×OD×height in mm, quantity, destination country, working medium and any custom requirements for a formal quotation.
Do you support custom logo and export packaging for this seal?
Factory standard options are available for marking and packaging.