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When a worn or undersized shaft seal lets lubricant escape and contaminants creep in, the result is accelerated bearing wear, costly downtime, and messy cleanup. Engineers, mechanics, and workshop owners working on gearboxes, axles, pumps, and industrial machinery need a seal they can trust to hold under continuous rotation and pressure. These TC TTO double lip rotary shaft oil seals are engineered for exactly that — delivering a dependable barrier between your lubricant and the outside world.
Each seal features a dual-lip (TC/TTO) design with a primary sealing lip and a secondary dust-exclusion lip, constructed from nitrile rubber (NBR) bonded to a carbon steel case. Inner diameters span 75 mm to 82.55 mm (approximately 2.95 in to 3.25 in), outer diameters range from 85 mm to 171 mm (approximately 3.35 in to 6.73 in), and cross-section depths range from 5 mm to 16 mm (approximately 0.20 in to 0.63 in) — covering a wide spectrum of bore and housing combinations. Available in packs of 5 or 10 pieces.
Typical use cases include automotive rear axle and differential seal replacement, industrial gearbox and pump shaft sealing, and agricultural or construction equipment maintenance — anywhere a rotating shaft passes through a housing and a reliable lubricant barrier is required.
Primary sealing lip retains lubricant; secondary dust lip blocks contaminants — the TC/TTO configuration standard for demanding rotary shaft environments.
Inner diameters from 75 mm to 82.55 mm with dozens of outer diameter and depth combinations, reducing the need to source multiple part numbers for a single job.
Nitrile rubber (NBR) compound offers resistance to petroleum-based oils and greases; the carbon steel outer case ensures a secure press-fit in the housing bore.
An internal garter spring maintains consistent radial lip pressure against the shaft, compensating for minor shaft runout and extending service life.
Available in packs of 5 or 10 pieces per variant — stock up for fleet maintenance or workshop inventory without over-ordering.
Suited for automotive axles, differentials, gearboxes, hydraulic pumps, agricultural equipment, and general industrial rotating machinery.
| Seal Type | TC / TTO Double Lip Rotary Shaft Oil Seal |
|---|---|
| Inner Diameter (ID) Range | 75 mm – 82.55 mm (approx. 2.95 in – 3.25 in) |
| Outer Diameter (OD) Range | 85 mm – 171 mm (approx. 3.35 in – 6.73 in) |
| Depth / Width Range | 5 mm – 16 mm (approx. 0.20 in – 0.63 in) |
| Lip Material | Nitrile Rubber (NBR) |
| Case Material | Carbon Steel |
| Lip Configuration | Dual lip (primary sealing lip + secondary dust exclusion lip) |
| Spring Type | Garter spring (internal) |
| Fluid Compatibility | Petroleum-based oils and greases |
| Operating Temperature | Typically –40 °C to +120 °C (–40 °F to +248 °F); confirm for specific application |
| Packing Quantity | 5 pcs or 10 pcs (see variant options) |
| Exact Dimensions | See variant options |
Measure three dimensions on your existing seal or housing: the inner diameter (ID) that contacts the shaft, the outer diameter (OD) that presses into the housing bore, and the depth (width) of the seal groove. Match all three to the variant listed as "Inner Ø x Outer Ø x Depth" in millimeters. If you only have the shaft diameter, also measure the housing bore and groove depth before ordering.
"TC" and "TTO" both refer to a double-lip seal design with a metal case. The primary lip seals lubricant inside; the secondary lip (dust lip) faces outward to exclude dirt and moisture. This dual-lip configuration is the most common type used in automotive axles, gearboxes, and industrial rotating shafts.
These seals use NBR (nitrile rubber), which performs well with conventional petroleum-based oils, gear oils, and many ATF formulations. NBR has limited compatibility with some fully synthetic esters and certain high-additive fluids. If your application uses a fully synthetic or specialty fluid, verify NBR compatibility with your fluid supplier before installation.
Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lip with the same oil used in the application. Press the seal squarely into the bore using a seal driver or a flat plate — never hammer directly on the seal face. Ensure the seal sits flush or slightly below the housing face as specified by your equipment manual. Avoid nicking or folding the lip during installation.
For optimal sealing, the shaft surface in the contact zone should have a finish of approximately Ra 0.2–0.8 µm (8–32 µin). Rough or grooved shafts accelerate lip wear and cause premature leakage. If the shaft has a wear groove from the previous seal, consider repositioning the seal axially or using a shaft repair sleeve.
TC/TTO NBR seals are suitable for moderate shaft speeds typically up to approximately 4–8 m/s peripheral velocity, depending on shaft diameter and operating temperature. For very high-speed applications (e.g., turbocharger shafts), a PTFE-lip or labyrinth seal may be more appropriate. Confirm the shaft surface speed for your specific bore size before selecting this seal type.
Seals are wear items that benefit from having spares on hand. For fleet maintenance, workshop inventory, or multi-axle equipment, buying in packs of 5 or 10 reduces per-unit cost and ensures you have replacements ready for the next service interval without waiting for reorder. Select the pack size that matches your maintenance schedule.
