Measure three dimensions: the shaft inner diameter (ID), the housing bore outer diameter (OD), and the housing depth (thickness). All three must match your application. For example, a 20*40*7mm seal has a 20mm (≈0.787") ID, 40mm (≈1.575") OD, and 7mm (≈0.276") thickness. If replacing a worn seal, measure the shaft diameter directly for the ID and the bore for the OD. Always cross-reference with your equipment service manual when available.

TC-type rotary shaft oil seals are generally designed for low-to-medium pressure applications, typically up to 0.3 MPa (≈43 psi) of dynamic pressure. They are not intended for high-pressure hydraulic circuits. For higher-pressure systems, a cassette or labyrinth seal is generally recommended. Contact us to confirm suitability for your specific operating conditions.

Yes. FKM (Viton) rubber offers excellent resistance to petroleum oils, hydraulic fluids, fuels, and many industrial chemicals. It typically withstands temperatures from -20°C to +200°C (-4°F to +392°F), making these seals well-suited for outdoor power equipment, marine machinery, and chemically aggressive environments where standard NBR seals would degrade prematurely.

These are metric TC skeleton oil seals that generally conform to DIN 3760 / ISO 6194 dimensional standards. They are designed for metric shafts and bores. They are not intended for inch-standard shafts unless the metric dimensions happen to match your application. Always verify your shaft and bore diameters in millimeters before ordering.

1. Clean the housing bore and shaft thoroughly, removing all old sealant or debris.
2. Lightly lubricate the seal lips with the fluid being sealed (oil or grease).
3. Press the seal squarely into the bore using a seal driver or a flat block — never strike the seal face directly with a hammer.
4. Ensure the primary lip faces the fluid (oil) side and the secondary dust lip faces outward.
5. Press until the seal face is flush with or just below the bore surface, as specified by your equipment manual.

Yes. TC skeleton oil seals are widely used in industrial gearboxes, hydraulic pumps, electric motors, agricultural equipment drive shafts, and light automotive differential or transmission applications. The dual lip design provides both lubricant retention and dust exclusion, making them a versatile choice for most rotating shaft assemblies that specify a metric TC seal.

A single lip seal has one sealing lip that retains lubricant on the fluid side. A dual lip (TC) seal adds a secondary lip that acts as a dust and contaminant excluder on the atmosphere side. This makes TC seals the preferred choice in environments where dirt, water, or debris may contact the shaft — such as outdoor power equipment, agricultural machinery, and industrial gearboxes operating in dusty or wet conditions.