TC Oil Seal 26mm ID NBR Nitrile Rotary Shaft Lip Seal — R23 Metric Sizes

Measure the shaft diameter (inner diameter), the bore diameter (outer diameter), and the housing depth (height) with calipers. All three dimensions must match your application. For this listing, the inner diameter is fixed at 26mm (≈1.024") — select the OD and height that match your housing. If you only have an inch measurement, 26mm is approximately 1.024". For example, a housing bore of 38mm (≈1.496") and depth of 7mm (≈0.276") would require the 26 × 38 × 7mm variant.

TC-type oil 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 nitrile rubber generally offers good resistance to petroleum-based oils, water, and mild weather exposure. However, NBR is not recommended for prolonged exposure to ozone, strong UV, or aromatic fuels. For outdoor equipment, ensure the seal is shielded from direct sunlight when possible. For harsh outdoor or chemical environments, a Viton (FKM) seal may be more appropriate.

These are metric TC oil seals conforming to the R23 / DIN 3760 standard. They are compatible with metric shafts and housings. The inner diameter is 26mm. Always verify the OD and height match your housing bore before installation. They are commonly used as replacements in European and Asian metric machinery.

TC oil seals have two sealing lips — a primary lip that retains lubricant and a secondary dust lip that excludes contaminants. SC seals have only a single lip. TC seals are generally preferred for applications where both oil retention and dust exclusion are needed, such as gearboxes, axles, and agricultural equipment.

Pack quantity is selectable as a variant option: 1, 2, 5, 8, 10, 15, 20, or 25 pieces per order, depending on the size selected. Choose the quantity that matches your maintenance or project needs. Larger packs offer a lower per-piece cost for shops that service multiple units.

TC oil seals are commonly used in gearboxes, differentials, axle housings, and pump shafts. As long as the shaft and bore dimensions match and the operating conditions are within NBR's temperature range (typically -40°F to +250°F / -40°C to +120°C), these seals are generally suitable. Verify your specific application requirements before installation.

Clean the housing bore and shaft thoroughly before installation. Apply a thin film of clean oil or grease to the seal lip and the shaft surface. Press the seal squarely into the bore using a seal driver or a flat block — never hammer directly on the seal face. Ensure the seal sits flush or slightly below the housing face. Avoid nicking the lip on keyways or splines during installation.