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When a worn or incorrectly sized shaft seal causes grease leakage, contamination ingress, or premature bearing failure, finding the exact replacement becomes critical. Mechanics, maintenance engineers, and DIY builders working on gearboxes, axles, pumps, and power-transmission assemblies need a TC double lip oil seal that matches their shaft diameter and housing bore precisely — without guesswork.
These TC double lip oil seals feature a nitrile rubber (NBR) sealing body bonded to a carbon steel case, with a garter spring-loaded primary lip and a secondary dust-exclusion lip. Inner diameters span 21 mm to 24 mm (approximately 0.827 in to 0.945 in), outer diameters range from 26 mm to 72 mm (approximately 1.024 in to 2.835 in), and cross-section depths run from 4 mm to 12 mm (approximately 0.157 in to 0.472 in). Each variant is listed by its Inner Ø × Outer Ø × Depth in millimetres so you can match your housing bore and shaft diameter directly.
Typical applications include automotive differential and transmission shaft seals, agricultural and construction equipment gearbox seals, hydraulic pump and motor shaft seals, and general industrial rotary shaft sealing where a TC-type double lip seal is specified. Long-tail search terms such as "21mm ID rotary shaft oil seal replacement," "22mm TC double lip seal gearbox," and "24mm NBR shaft seal automotive" describe exactly the scenarios these seals are designed to solve.
| Seal Type | TC (Double Lip with Garter Spring) |
|---|---|
| Inner Diameter (ID) Range | 21 mm – 24 mm (0.827 in – 0.945 in) |
| Outer Diameter (OD) Range | 26 mm – 72 mm (1.024 in – 2.835 in) |
| Depth Range | 4 mm – 12 mm (0.157 in – 0.472 in) |
| Sealing Body Material | Nitrile Rubber (NBR) |
| Case Material | Carbon Steel |
| Lip Configuration | Double Lip (Primary + Dust Exclusion) |
| Spring Type | Garter Spring (Primary Lip) |
| Operating Temperature | −40 °C to +120 °C (−40 °F to +248 °F) |
| Compatible Fluids | Petroleum-based oils, greases, common hydraulic fluids |
| Installation Method | Press-fit into housing bore |
| Packing Quantity | See variant options (1 / 5 / 10 pcs) |
| Exact Dimensions | See variant options (Inner Ø × Outer Ø × Depth mm) |
Measure three dimensions with a calliper: the shaft diameter (this becomes the Inner Ø), the housing bore diameter (this becomes the Outer Ø), and the housing depth (this becomes the Depth). Match all three to the variant label shown as Inner Ø × Outer Ø × Depth in millimetres. If your measurements are in inches, multiply by 25.4 to convert to mm.
TC is a standard designation for a double-lip rotary shaft seal with a garter spring on the primary lip. The primary lip retains lubricant on the inboard side, while the secondary lip acts as a dust and contamination excluder on the outboard side. This dual-lip design makes TC seals suitable for environments where both oil retention and dirt exclusion are required.
The NBR (nitrile rubber) body is compatible with petroleum-based mineral oils, greases, and most standard hydraulic fluids. NBR has limited resistance to some synthetic esters and certain aggressive hydraulic fluids. If your application uses fully synthetic or phosphate-ester-based fluids, please confirm fluid compatibility before ordering.
The carbon steel outer case is sized to provide an interference fit with the housing bore. Retention force depends on the bore tolerance and surface finish of your housing. For best results, ensure the housing bore is clean, free of burrs, and within the standard H7 or H8 tolerance. Use a flat press tool or seal driver — never hammer directly on the seal face.
The NBR compound is rated for continuous operation from −40 °C to +120 °C (−40 °F to +248 °F). Most automotive and light industrial gearboxes operate well within this range. For applications where oil temperatures regularly exceed 120 °C, a Viton (FKM) seal may be more appropriate.
Yes. Many size variants are available in a quantity of 1 piece, allowing you to verify fitment in your application before committing to a pack of 5 or 10. Select "1" from the Packing Quantity option in the variant selector above.
Clean the shaft and housing bore thoroughly. Apply a thin film of clean oil or grease to the sealing lip and the shaft surface. Use a seal driver or a flat disc of the correct diameter to press the seal squarely into the housing bore until it is flush or just below the housing face. Avoid tilting the seal during installation, and never use a screwdriver or sharp tool near the lip.
