Metric Oil Shaft Seal 125mm - 139mm Dust Grease Seal TC Double Lip w Spring

Measure your shaft outer diameter (this becomes the seal's inner diameter), the housing bore diameter (this becomes the seal's outer diameter), and the housing depth (this becomes the seal's width/depth). Match all three dimensions to the variant listed as Inner Ø × Outer Ø × Depth. If your shaft is 130 mm, select a variant with 130 mm as the first number.

"TC" designates a double-lip seal with a garter spring. The first lip (primary) is spring-loaded to maintain sealing contact against the rotating shaft; the second lip (dust lip) faces outward to exclude contaminants. This two-lip configuration provides superior protection compared to single-lip (SC) seals in dirty or wet environments.

The NBR (nitrile rubber) compound used in these seals is rated for continuous service up to approximately 120 °C (248 °F). For higher-temperature applications (above 150 °C), consider FKM (Viton) seals instead. Avoid prolonged exposure to ketones, esters, or highly aromatic fuels, which can degrade NBR.

The carbon steel outer case provides adequate rigidity for press-fit installation but is not stainless. In high-humidity or wash-down environments, apply a thin film of grease to the outer case before installation to inhibit surface rust. The NBR sealing lips themselves are resistant to water and petroleum-based fluids.

These metric TC seals are suitable for any application requiring a shaft seal with an inner diameter between 125 mm and 139.7 mm, including agricultural tractors, combine harvesters, industrial gearboxes, hydraulic pumps, conveyor drives, heavy-duty truck axles, and trailer wheel hubs. Always verify the exact ID, OD, and depth against your equipment's service manual before ordering.

Clean the housing bore and shaft thoroughly. Apply a thin film of clean oil or grease to the seal lips and the outer case. Use a seal driver or a flat press plate to push the seal squarely into the bore — never hammer directly on the seal face. Press until the seal is flush with or just below the housing face. Avoid cocking the seal during installation, as this can damage the lip and cause immediate leakage.

Both options are available. Select the "Packing Quantity (pcs)" variant to choose 1, 2, 5, or 10 pieces per order. Single-piece options are ideal for one-off repairs, while 5- or 10-piece packs offer better value for workshop stock or fleet maintenance programs.