What is the load or pressure rating of these seals?

TC skeleton oil seals are typically designed for low-to-medium pressure applications. They generally handle shaft speeds up to approximately 4–8 m/s surface speed and static pressures up to around 0.05 MPa. For high-pressure hydraulic circuits, a different seal type is recommended. Contact us to confirm suitability for your application.

TC Skeleton Oil Seals ID 120–150mm NBR Dual Lip Rotary Shaft Seal

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TC Skeleton Oil Seals ID 120–150mm NBR Dual Lip Rotary Shaft Seal

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Sizes (ID x OD x Thickness): 120*135*7mm

Packing QTY (Piece): 1 PCS

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$7.40 USD

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In stock (500 units), ready to be shipped

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TC Skeleton Oil Seals ID 120–150mm — Stop Shaft Leaks Before They Stop You

Leaking gearboxes, dripping pump housings, and contaminated bearings are costly headaches for mechanics, equipment operators, and maintenance teams. Whether you're rebuilding a tractor PTO, servicing an industrial motor, or overhauling a hydraulic pump, finding the exact TC oil seal in the right size — without waiting weeks for a special order — is half the battle.

Each seal in this listing is a TC-type skeleton oil seal made from NBR (nitrile butadiene rubber) with a rigid steel skeleton insert for shape retention. The dual-lip design features a primary sealing lip to retain lubricant and a secondary dust lip to block contaminants. Sizes span ID 120mm to 150mm (≈4.72″ to 5.91″), with OD options from 135mm to 225mm and thickness from 7mm to 18mm — select your exact ID × OD × Thickness from the variant dropdown above.

These TC rotary shaft seals are widely used in agricultural machinery gearboxes, industrial electric motor end caps, and hydraulic pump shaft housings — anywhere a rotating shaft passes through a stationary housing and a reliable oil-tight barrier is needed.

🔵 Compatibility Note: These seals follow standard metric dimensions (ISO/DIN). Match your shaft ID, housing bore OD, and housing depth (thickness) exactly. If your shaft has a keyway or spline, protect the seal lip during installation with a sleeve or tape.

⚠️ Size Confirmation: With 200+ size combinations available, please double-check all three dimensions — ID, OD, and Thickness — before ordering. Refer to the variant selector above. If you are unsure, contact us to confirm.

✅ Key Features of These TC Skeleton Oil Seals

🔩Dual-Lip TC Design — The primary lip seals lubricant in; the secondary dust lip keeps dirt, moisture, and debris out of the bearing cavity, extending equipment service life.
🧲Rigid Steel Skeleton Insert — An embedded metal ring maintains the seal's circular shape under press-fit installation and prevents distortion during operation on rotary shafts.
🛢️NBR Rubber Compound — Nitrile rubber offers broad compatibility with petroleum-based mineral oils, gear oils, and greases commonly used in gearboxes, motors, and hydraulic pump applications.
📐Wide Size Range in One Listing — ID 120mm to 150mm (≈4.72″–5.91″) with multiple OD and thickness combinations, covering a broad range of metric shaft seal applications without sourcing from multiple suppliers.
⚙️Standard Metric Dimensions — Sized to ISO and DIN tolerances, making these TC rotary shaft seals a direct fit for European and Asian-spec machinery, agricultural equipment, and industrial motors.
🚚Ships from US Warehouse — Stocked domestically for faster delivery, so your equipment downtime is measured in days, not weeks waiting for overseas shipment.

📐 Technical Specifications — TC Skeleton NBR Oil Seal

Seal Type	TC (Double Lip / Twin Contact Skeleton)
Material	NBR (Nitrile Butadiene Rubber) with steel skeleton
Inner Diameter (ID) Range	120mm – 150mm (≈4.72″ – 5.91″)
Outer Diameter (OD) Range	135mm – 225mm (≈5.31″ – 8.86″)
Thickness Range	7mm – 18mm (≈0.28″ – 0.71″)
Lip Configuration	Dual lip — primary sealing lip + secondary dust lip
Operating Temperature	Typically −40°C to +120°C (−40°F to +248°F) for NBR
Compatible Fluids	Petroleum-based mineral oils, gear oils, greases (see FAQ)
Shaft Speed	See variant options — generally suitable for low-to-medium speed rotary shafts
Pressure Rating	Contact us to confirm — typically low-pressure static sealing
Quantity per Order	1 PCS per variant
Dimension Standard	Metric (ISO/DIN compatible)
Country of Origin	See variant options

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure three dimensions: the shaft inner diameter (ID), the housing bore outer diameter (OD), and the housing depth (thickness). Match all three to the variant listed as ID×OD×Thickness. For example, a 130×150×10mm seal fits a 130mm (≈5.12″) shaft, a 150mm (≈5.91″) bore, and a 10mm (≈0.39″) housing depth. A seal that is even 1mm off will not seat correctly and will leak.

What does "TC" mean on an oil seal?

TC stands for a double-lip (twin-contact) skeleton oil seal. The primary lip retains lubricant inside the housing while the secondary dust lip generally prevents contaminants — dirt, water, and debris — from entering the bearing or gearbox cavity. This dual-lip design is the most common type used in rotary shaft applications.

What is the pressure or load rating of these seals?

TC skeleton oil seals are typically designed for low-to-medium pressure applications. They generally handle shaft surface speeds up to approximately 4–8 m/s and static pressures up to around 0.05 MPa. For high-pressure hydraulic circuits, a different seal type is recommended. Contact us to confirm suitability for your specific application.

Can these NBR oil seals be used outdoors or in wet environments?

NBR (nitrile rubber) generally offers good resistance to water, petroleum-based oils, and mild chemicals, making it commonly used in outdoor agricultural and industrial equipment. However, NBR is not recommended for prolonged exposure to ozone, strong UV radiation, or ketone-based fluids. For highly corrosive outdoor environments, a FKM (Viton) seal may be more appropriate.

Are these seals compatible with standard metric shaft tolerances?

Yes. These TC skeleton seals follow standard metric dimensions and are generally compatible with ISO and DIN shaft and bore tolerances. The ID dimension corresponds to the shaft diameter. Always verify the OD matches your housing bore before installation. If your shaft has a keyway or spline, use an installation sleeve to protect the seal lip.

What lubricants are compatible with NBR oil seals?

NBR seals are compatible with most petroleum-based mineral oils, hydraulic fluids, gear oils, and greases. They are not recommended for use with synthetic esters, phosphate esters, or aromatic solvents. When in doubt, verify the fluid's compatibility with nitrile rubber before installation to avoid premature seal degradation.

How do I install a TC skeleton oil seal correctly?

Clean the housing bore and shaft thoroughly. Lightly lubricate the seal lip with the same oil used in the application. Press the seal in squarely using a flat tool or seal driver — never hammer directly on the seal face. Ensure the seal sits flush or slightly below the housing face. Avoid nicking the lip on keyways or splines during installation by using a protective sleeve or tape over the shaft end.

🛒 Select your size (ID × OD × Thickness) above, then add to cart — ships from our US warehouse.

TC Skeleton Oil Seals ID 120–150mm NBR Dual Lip Rotary Shaft Seal

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TC Skeleton Oil Seals ID 120–150mm — Stop Shaft Leaks Before They Stop You

✅ Key Features of These TC Skeleton Oil Seals

📐 Technical Specifications — TC Skeleton NBR Oil Seal

❓ Frequently Asked Questions

TC Skeleton Oil Seals ID 120–150mm NBR Dual Lip Rotary Shaft Seal

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