TC Oil Seal NBR Double Lip Rotary Shaft Seal — ID 8–35mm, 236 Sizes

Measure three dimensions with calipers: the shaft diameter (this is the I.D.), the housing bore diameter (this is the O.D.), and the housing depth (this is the Height). Match all three to the variant listed as I.D × O.D × Height in mm. For example, a 20×35×7mm seal fits a 20mm shaft, a 35mm bore, and a 7mm deep housing. If you have inch measurements, multiply by 25.4 — e.g., a 0.787" shaft = 20mm.

TC-type rotary shaft seals are generally designed for low-to-medium pressure applications. They are typically rated for shaft speeds up to around 4–8 m/s and static pressures up to approximately 0.05 MPa. For high-pressure hydraulic systems, a different seal type is recommended. Contact us to confirm suitability for your specific application.

NBR rubber offers good resistance to petroleum-based oils, greases, and water splash. It generally performs well in temperatures from approximately -40°F to +250°F (-40°C to +120°C). For continuous outdoor immersion or exposure to fuels and aggressive solvents, a Viton (FKM) seal may be more appropriate. Contact us to confirm compatibility with your specific fluid and environment.

These are metric-dimensioned TC oil seals compatible with standard metric shafts and bores. Compatibility depends on the shaft OD, housing bore ID, and housing depth — not on thread standards. They are generally interchangeable with DIN 3760 / ISO 6194 standard TC-type seals of the same dimensions, making them a direct replacement for most OEM metric shaft seals.

Clean the housing bore and shaft. Lightly lubricate the seal lips with the fluid being sealed (e.g., gear oil). Press the seal squarely into the bore using a seal driver or flat press — never hammer directly on the seal face. The primary spring-loaded lip faces the fluid side (inward); the secondary dust lip faces outward. Ensure the seal sits flush or slightly below the housing face.

A TC seal has a metal skeleton with two rubber lips — one spring-loaded primary sealing lip and one secondary dust exclusion lip. An SC seal typically has a single lip with no dust exclusion. TC seals are the most common choice for general-purpose rotary shaft sealing where both oil retention and contamination exclusion are needed, such as in gearboxes, axles, and pumps.

Yes. TC-type NBR double lip oil seals are commonly used in gearboxes, hydraulic pumps, electric motors, agricultural equipment, automotive axles, and general industrial machinery. Select the size that matches your shaft and housing dimensions. For high-speed or high-temperature applications, verify the NBR temperature range is adequate for your use case before ordering.