What is the temperature and pressure rating of these NBR seals?

NBR (nitrile butadiene rubber) seals generally handle temperatures from approximately -40°F to +250°F (-40°C to +120°C) and are suited for low-to-moderate shaft speeds and pressures. For high-temperature or chemical-exposure applications, contact us to confirm suitability.

Can these seals be used outdoors or in wet environments?

Yes. NBR is generally resistant to water, petroleum-based oils, and mild hydraulic fluids, making these seals suitable for outdoor equipment, garden machinery, and light agricultural use. For prolonged saltwater or chemical exposure, verify compatibility before installation.

TC Double Lip NBR Oil Seal — Rotary Shaft Seal | Multiple Sizes

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TC Double Lip NBR Oil Seal — Rotary Shaft Seal | Multiple Sizes

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Height: 5mm

Inner Diameter x Outer Diameter: 8mm x 18mm

Amount: 5 Pcs

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$8.77 USD

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TC Double Lip NBR Oil Seal — Stop Leaks and Keep Contaminants Out

When a gearbox starts weeping oil or a pump shaft lets grit into the bearing, the culprit is almost always a worn or incorrectly sized rotary shaft seal. Mechanics, equipment owners, and DIY repair technicians who work on small engines, garden machinery, ATVs, and industrial drives need a reliable TC double lip NBR oil seal that installs cleanly and holds up under continuous rotation.

Each seal in this listing is a TC-type (double-lipped) rotary shaft seal molded from NBR (nitrile butadiene rubber) with a steel reinforcing case. Inner diameters range from 8mm (≈5/16") to 20mm (≈25/32"), outer diameters from 17mm (≈43/64") to 52mm (≈2-1/16"), and heights from 5mm (≈13/64") to 10mm (≈25/64"). Available in packs of 2, 5, 25, or 50 pieces to suit single repairs or workshop stock.

Typical applications include gearbox output shaft sealing, electric motor end-cap sealing, lawn mower crankshaft seals, tiller and cultivator shaft seals, go-kart and ATV axle seals, and light hydraulic pump shaft seals — anywhere a rotating shaft passes through a lubricated housing and must be protected from external contamination.

🔵 Compatibility: Fits metric shafts and housings. Select the variant whose Inner Diameter matches your shaft OD, Outer Diameter matches your housing bore, and Height matches your housing depth. Verify all three dimensions before ordering.

✅ Key Features of These TC Double Lip NBR Oil Seals

🔒Double-Lip TC Design — The primary lip retains lubricant on the inboard side while the secondary dust lip blocks dirt, water, and debris from reaching the bearing, extending service life in dirty or wet environments.
🧪NBR Rubber Construction — Nitrile butadiene rubber resists petroleum-based oils, greases, and mild hydraulic fluids, making these rotary shaft seals a dependable choice for engine and gearbox applications.
🔩Steel-Reinforced Case — A stamped steel outer shell maintains dimensional stability during press-fit installation into the housing bore and prevents the seal from spinning or walking out under vibration.
📐Wide Size Range — Inner diameters from 8mm to 20mm and outer diameters from 17mm to 52mm cover a broad range of small-engine, pump, and gearbox shaft seal applications without needing multiple suppliers.
🌡️Broad Operating Temperature — NBR compound generally performs from approximately -40°F to +250°F (-40°C to +120°C), suitable for year-round outdoor equipment use and typical workshop machinery.
📦Flexible Pack Quantities — Choose 2, 5, 25, or 50 pieces per order — ideal whether you need a single replacement seal or want to stock your workshop for recurring maintenance jobs.

📐 Technical Specifications — TC Rotary Shaft Oil Seal

Seal Type	TC (Double Lip)
Material	NBR (Nitrile Butadiene Rubber) with steel reinforcing case
Inner Diameter (ID)	8mm (≈5/16") – 20mm (≈25/32") — see variant options
Outer Diameter (OD)	17mm (≈43/64") – 52mm (≈2-1/16") — see variant options
Height (Width)	5mm (≈13/64"), 7mm (≈9/32"), 8mm (≈5/16"), 10mm (≈25/64")
Pack Quantity	2 Pcs / 5 Pcs / 25 Pcs / 50 Pcs — see variant options
Operating Temperature	Typically -40°F to +250°F (-40°C to +120°C)
Fluid Compatibility	Petroleum-based oils, greases, mild hydraulic fluids
Dimension Standard	Metric (mm)
Installation Method	Press-fit into housing bore
Color / Finish	Contact us to confirm

⚠️ Sizing Note: Always measure your shaft OD (= seal ID), housing bore ID (= seal OD), and housing depth (= seal height) before selecting a variant. A seal that is even 0.5mm off in any dimension may leak or fail to seat correctly.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure three dimensions: (1) your shaft outer diameter — this equals the seal's Inner Diameter; (2) the bore diameter of the housing — this equals the seal's Outer Diameter; (3) the depth of the housing recess — this equals the seal's Height. For example, a 10mm (≈3/8") shaft in a 22mm (≈7/8") bore with a 7mm (≈9/32") deep housing uses the 10mm × 22mm / 7mm variant. When in doubt, measure twice and compare to the variant list above.

What does "TC" mean on an oil seal?

TC designates a double-lipped seal design. The primary (inner) lip retains lubricant — oil or grease — on the inboard side of the housing. The secondary (outer) dust lip faces outward and blocks contaminants such as dirt, water, and fine particles from entering the bearing or shaft area. This two-barrier design makes TC seals the standard choice for gearboxes, motors, and outdoor power equipment.

What temperature and pressure range do these NBR seals handle?

NBR (nitrile butadiene rubber) generally performs from approximately -40°F to +250°F (-40°C to +120°C) and is suited for low-to-moderate shaft speeds and pressures typical of small engines, gearboxes, and pumps. For high-temperature applications (above 250°F) or exposure to synthetic esters or ketones, contact us to confirm suitability before ordering.

Can these seals be used outdoors or in wet conditions?

Yes. NBR is generally resistant to water, petroleum-based oils, and mild hydraulic fluids, making these rotary shaft seals suitable for outdoor power equipment, garden machinery, and light agricultural applications. The secondary dust lip provides an additional barrier against moisture ingress. For prolonged saltwater immersion or aggressive chemical exposure, verify compatibility before installation.

Are these seals compatible with metric shafts and housings?

Yes — all dimensions (ID, OD, and height) follow metric standards. Inch equivalents are provided in the description for reference. These seals are designed for metric shafts and housings as found on most European and Asian-origin machinery, as well as many modern US-made small engines and gearboxes that use metric fastener and bearing standards.

What equipment are TC oil seals typically used in?

TC rotary shaft seals are commonly found in: gearboxes and transmissions, electric motor end caps, lawn mower and garden tractor crankshafts, tillers and cultivators, go-karts and ATVs, light hydraulic pumps, and general industrial machinery wherever a rotating shaft passes through a housing that contains lubricant. The sizes in this listing (8–20mm ID) are particularly common in small-engine and light-duty industrial applications.

How do I install a TC oil seal without damaging it?

Follow these steps for a clean installation: (1) Clean the housing bore and shaft thoroughly. (2) Lightly coat the seal lip with clean oil or grease. (3) Align the seal squarely with the bore — primary lip facing inward toward the lubricant. (4) Press the seal in evenly using a flat driver, socket, or dedicated seal installation tool that contacts only the outer steel case. Never hammer directly on the rubber lip or face. (5) Seat the seal flush with or just below the housing surface.

🛒 Select your size (Inner Diameter × Outer Diameter), height, and quantity above, then add to cart — ships from our US warehouse.

TC Double Lip NBR Oil Seal — Rotary Shaft Seal | Multiple Sizes

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Description

TC Double Lip NBR Oil Seal — Stop Leaks and Keep Contaminants Out

✅ Key Features of These TC Double Lip NBR Oil Seals

📐 Technical Specifications — TC Rotary Shaft Oil Seal

❓ Frequently Asked Questions

TC Double Lip NBR Oil Seal — Rotary Shaft Seal | Multiple Sizes

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