10PCS TC Oil Seal NBR Double Lip Rotary Shaft Seal — ID 14mm 15mm 16mm

Match all three dimensions to your application: Inner Diameter (I.D.) must equal your shaft diameter; Outer Diameter (O.D.) must match your housing bore; Depth must fit your housing groove. Use a caliper to measure the old seal or the shaft and housing directly. For example, a shaft measuring 15mm with a 30mm bore and 7mm groove depth requires the 15 x 30 x 7mm variant. If you're unsure, contact us before ordering.

TC indicates a double-lip seal design. The first (primary) lip contacts the shaft to retain lubricant inside the housing. The second (secondary) lip acts as a dust excluder, preventing dirt, grit, and moisture from entering from the outside. TC is the most widely used configuration for rotary shaft applications in gearboxes, pumps, motors, and axles.

NBR (Nitrile Butadiene Rubber) generally performs well from approximately -40°F to +212°F (-40°C to +100°C). It resists petroleum-based oils, greases, and fuels effectively within this range. For applications exceeding these temperatures or involving aggressive chemicals such as brake fluid or synthetic esters, a Viton (FKM) seal is typically a better choice.

NBR seals are generally suitable for environments with oil, grease, and incidental moisture exposure. They are not recommended for prolonged water immersion or direct UV/ozone exposure. In outdoor equipment such as lawn tractors or agricultural machinery, the seal should be housed within a protected bore — which is the standard installation in most rotating assemblies.

TC-type NBR oil seals are typically rated for shaft surface speeds up to approximately 4–6 m/s (roughly 800–1,200 ft/min) under normal lubricated conditions. Actual limits depend on shaft surface finish (Ra ≤ 0.2–0.8 µm is generally recommended), lubrication, and operating temperature. For high-speed spindle or turbine applications, contact us to confirm suitability.

These seals use metric dimensions. They can fit imperial shafts if the shaft diameter converts closely to the listed I.D. — for example, a 14mm I.D. seal fits a shaft of approximately 0.551", and a 16mm I.D. seal fits approximately 0.630". Always verify with a caliper rather than relying on nominal conversions, as even a 0.1mm mismatch can cause leakage or premature wear.

Oil seals are wear items that require periodic replacement as part of routine maintenance. Purchasing a 10-pack means you have spares ready for the next service interval, reducing equipment downtime and the cost of a separate order. This is especially practical for workshop bench stock, fleet maintenance programs, or equipment with multiple seal points of the same size.