NBR TC Oil Seal Double Lip Skeleton Seal Rings for Rotation Shaft — ID 38–180mm

Measure your shaft's outer diameter — this becomes the seal's Inner Diameter (ID). Then measure your housing bore for the Outer Diameter (OD), and your housing groove depth for the Height. For example, a 40mm shaft typically uses a seal with ID 40mm. Always confirm all three dimensions before ordering. Sizes in this listing range from ID 38mm (≈1.50") to ID 180mm (≈7.09").

TC skeleton oil seals are generally designed for low-to-medium pressure applications, typically rated for static pressures up to 0.05 MPa (≈7 psi). They are not intended for high-pressure hydraulic circuits. For dynamic shaft sealing at normal operating pressures in gearboxes, pumps, and drivetrains, they perform reliably in most applications.

NBR rubber offers good resistance to water, petroleum oils, and mild weather exposure, making these seals generally suitable for outdoor equipment, agricultural machinery, and wet environments. However, NBR is not recommended for prolonged exposure to ozone, strong UV radiation, or aromatic solvents. For extreme outdoor or chemical exposure, FKM (Viton) seals are typically a better choice.

NBR TC oil seals are typically rated for shaft surface speeds up to approximately 4–6 m/s and operating temperatures from -40°F to +212°F (-40°C to +100°C). Actual performance depends on the specific lubricant, shaft finish, and application conditions. Contact us to confirm suitability for high-speed or elevated-temperature applications.

TC seals (this listing) have a double lip — a primary lip that retains lubricant and a secondary dust lip that blocks contaminants. SC seals have a single lip for oil retention only. Choose TC when your application involves both oil retention and exposure to dust, dirt, or moisture — which covers most gearbox, agricultural, and automotive shaft applications.

Yes. All sizes follow standard metric dimensions (ID × OD × Height in mm), compatible with ISO and DIN metric shaft and housing standards. They are widely used as direct replacements in European and Asian machinery. For inch-standard equipment, verify the metric equivalent — for example, ID 38mm ≈ 1.50", ID 50mm ≈ 1.97", ID 75mm ≈ 2.95", ID 100mm ≈ 3.94".

Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lip with the same oil or grease used in the application. Press the seal squarely into the housing using a seal driver or flat block — never hammer directly on the seal face. The primary lip should face the oil side (inward toward the lubricant). Avoid nicking or rolling the lip during installation, as this will cause immediate leakage.