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When a worn or mismatched shaft seal causes oil leaks in your gearbox, pump, or rotary equipment, the damage compounds fast — contaminated lubricant, accelerated bearing wear, and costly downtime. This metric TC rotary oil shaft seal is engineered for engineers, mechanics, and serious DIYers who need a reliable, chemically resistant seal the first time, every time. With FKM (fluorocarbon/Viton) elastomer construction and a double-lip design, it handles the demanding environments where standard NBR seals fall short.
Each seal features a dual-lip TC profile — a primary sealing lip that retains oil and a secondary dust-exclusion lip that blocks contaminants from entering the shaft housing. The FKM compound delivers outstanding resistance to petroleum oils, synthetic lubricants, fuels, and elevated temperatures. Inner shaft diameters span 40–45mm (1.575–1.772 in), with outer diameters ranging from 47–100mm (1.850–3.937 in) and seal depths of 4–18mm (0.157–0.709 in) across the variant range. Sold in packs of 2.
Typical applications include automotive differential and transmission output shafts, industrial gearbox input/output flanges, hydraulic pump shaft seals, and agricultural equipment PTO shafts — anywhere a metric TC oil seal for 40mm–45mm shafts is required. Long-tail use cases include replacement seals for metric gearboxes, FKM shaft seals for high-temperature environments, and double-lip rotary seals for dusty or wet operating conditions.
Resists petroleum oils, synthetic lubricants, fuels, and temperatures typically up to 200°C (392°F) — far beyond standard NBR seals.
TC Double-Lip DesignPrimary lip retains lubricant; secondary dust lip blocks ingress of dirt, water, and debris — extending bearing and seal service life.
Metric Precision SizingInner diameters 40–45mm, outer diameters 47–100mm, depths 4–18mm — covering a wide range of metric shaft and housing combinations in one catalog.
Metal-Cased ShellRigid outer casing ensures consistent press-fit into the housing bore, maintaining concentricity and preventing seal rotation under operating loads.
Sold in Packs of 2Each listing ships 2 seals per pack — ideal for paired axle applications, keeping a spare on hand, or completing a full rebuild in one order.
Broad Application RangeSuitable for automotive transmissions, differentials, industrial gearboxes, hydraulic pumps, and agricultural PTO shafts requiring a metric TC rotary oil seal.
| Seal Type | TC (Double Lip with Dust Lip) |
|---|---|
| Material | FKM (Fluorocarbon / Viton) Elastomer |
| Shell Construction | Metal-cased outer ring |
| Inner Diameter (Shaft) | 40–45mm (1.575–1.772 in) |
| Outer Diameter (Housing Bore) | 47–100mm (1.850–3.937 in) — See variant options |
| Seal Depth | 4–18mm (0.157–0.709 in) — See variant options |
| Operating Temperature | Typically –20°C to +200°C (–4°F to +392°F) |
| Media Compatibility | Petroleum oils, synthetic lubricants, fuels, mild acids |
| Packing Quantity | 2 pcs per pack |
| Weight | See variant options |
| Standard | Metric (DIN / ISO profile) |
Measure three dimensions on your existing seal or shaft housing: the inner diameter (shaft OD), the outer diameter (housing bore ID), and the seal depth (axial width). Match all three to the "Inner Ø × Outer Ø × Depth" variant listed in millimeters. If your seal is worn, measure the housing bore and shaft directly with calipers for the most accurate fit.
NBR (nitrile) seals are suitable for standard mineral oils at moderate temperatures. FKM (fluorocarbon/Viton) seals are the correct choice when operating temperatures exceed ~120°C, when synthetic lubricants (PAO, ester-based) are used, or when the seal is exposed to fuels, hydraulic fluids, or mild chemical environments. FKM also offers superior aging resistance, reducing replacement frequency in demanding applications.
TC refers to the seal's lip configuration: a primary sealing lip (oil-side) that retains lubricant, plus a secondary dust-exclusion lip (air-side) that prevents contaminants from entering the housing. This dual-lip design makes TC seals the standard choice for rotating shaft applications in automotive and industrial equipment where both oil retention and contamination exclusion are required.
Yes. FKM elastomer is compatible with most synthetic gear oils (PAO-based), automatic transmission fluids (ATF), and hydraulic fluids. Always verify compatibility with your specific fluid formulation if it contains aggressive additives. For standard mineral gear oils and engine oils, FKM provides excellent long-term sealing performance.
A seal driver or appropriately sized socket is strongly recommended to ensure the seal seats squarely and to the correct depth without distorting the metal casing or lip. Driving the seal in unevenly can cause immediate leakage. Apply a thin film of clean oil to the outer casing before installation to ease press-fit into the housing bore, and lubricate the sealing lip lightly before sliding onto the shaft.
The outer diameter listed in the variant name is the nominal housing bore size. TC seals are designed with a slight interference fit — the seal OD is typically 0.1–0.3mm larger than the housing bore to ensure a secure press fit. If your housing bore is worn or oversized, contact us to confirm suitability before ordering.
A single-lip seal (type SC or R) has only one sealing lip for oil retention. A double-lip TC seal adds a second, lighter dust lip on the atmosphere side. The dust lip does not contact the shaft under significant pressure — it acts as a wiper to exclude dirt, water, and debris. For most rotating shaft applications exposed to external contamination, TC is the preferred configuration.
