TC Oil Seal Ring NBR Double Lip Rotary Shaft Seal — ID 26 27 28 29mm

Measure three dimensions directly from your equipment using calipers: the shaft inner diameter (ID), the housing bore outer diameter (OD), and the housing depth (thickness). Match all three to the variant listed as ID × OD × Thickness. For example, a 28 × 47 × 7mm seal fits a 28mm (≈1.10") shaft, a 47mm (≈1.85") bore, and a 7mm (≈0.28") housing depth. Do not rely solely on the old seal's markings — measure directly for the most accurate fit.

TC-type seals have two sealing lips: a primary lip (spring-loaded) that retains lubricant inside the housing, and a secondary dust lip that prevents dirt, water, and debris from entering. This dual-barrier design generally provides better protection than single-lip seals in environments with light contamination — common in agricultural equipment, gearboxes, and outdoor machinery.

TC skeleton oil seals are designed for low-to-medium pressure rotary shaft applications. They are generally suitable for static pressures up to approximately 0.05 MPa (≈7 psi). For high-pressure hydraulic circuits or dynamic pressure applications, a different seal type (such as a lip seal with a backup ring) is typically required. Contact us to confirm suitability for your specific application.

NBR nitrile rubber offers good resistance to water, petroleum oils, and mild chemicals, making it generally suitable for outdoor and wet environments. However, NBR is not recommended for prolonged exposure to ozone, strong UV radiation, or aromatic solvents. For highly corrosive or extreme outdoor conditions, FKM (Viton) seals are typically a better choice. The secondary dust lip on TC seals adds an extra layer of moisture protection.

NBR TC oil seals are typically rated for shaft surface speeds up to approximately 4–6 m/s and operating temperatures from about -40°F to +250°F (-40°C to +120°C). Actual performance depends on lubrication quality, shaft surface finish (Ra typically 0.2–0.8 µm recommended), and load conditions. Contact us to confirm for your specific application.

Yes. All dimensions follow standard metric sizing (mm). The ID fits the shaft, the OD fits the housing bore, and the thickness matches the housing depth. These seals are generally interchangeable with other TC-type metric oil seals from major manufacturers when all three dimensions match. Always verify all three dimensions — ID, OD, and thickness — before ordering.

Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lips with the fluid being sealed (oil or grease). Press the seal squarely into the bore using a seal driver or a flat plate — never hammer directly on the seal face or lip. Ensure the primary lip faces the lubricant side (inward). Avoid nicking, rolling, or folding the lip during installation. Check that the seal sits flush with or slightly below the housing face.

Seals in the 26–29mm ID range are commonly found in: small gearboxes and reducers, agricultural and lawn equipment wheel hubs, motorcycle and ATV crankcase and wheel seals, light industrial pump shafts, power tool gearheads, and marine outboard lower units. Always verify the exact ID, OD, and thickness against your equipment's service manual or the original seal markings before ordering.