TC Oil Seal 20mm Shaft — Nitrile Double Lip Rotary Shaft Seal (20 x 26~52 x 4~12mm)

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TC Oil Seal 20mm Shaft — Nitrile Double Lip Rotary Shaft Seal (20 x 26~52 x 4~12mm)

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Size(ID x OD x Height): 20 x 26 x 4mm

Pack Quantity(Pcs): 5

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$4.75 USD

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TC Oil Seal for 20mm Shafts — Stop Leaks with a Nitrile Double Lip Rotary Shaft Seal

A leaking shaft seal is one of the most common causes of oil loss in engines, gearboxes, pumps, and agricultural equipment. Whether you're a mechanic rebuilding a transmission, a farmer servicing a tiller, or a DIYer fixing a lawn tractor, finding the exact replacement TC oil seal for a 20mm shaft — in the right OD and height — can be frustrating. This listing covers a wide range of sizes so you can get the right fit without ordering from multiple suppliers.

Each seal in this listing features a 20mm Inner Diameter (ID) to fit standard 20mm shafts. Outer Diameters (OD) range from 26mm (≈1.02") to 52mm (≈2.05"), and heights range from 4mm (≈0.16") to 12mm (≈0.47"). The sealing element is Nitrile rubber (NBR) bonded to a steel shell, with a garter spring-loaded primary lip and a secondary dust-exclusion lip. Available in packs of 2, 5, 10, or 25 pieces.

Typical applications include gearbox output shaft sealing, rotary tiller PTO shaft seals, small engine crankshaft seals, hydraulic pump shaft seals, and wheel hub grease retention — anywhere a 20mm rotary shaft seal is needed to retain lubricant and exclude contaminants.

ℹ️ Compatibility Note: Select your size by matching ID (20mm) to shaft diameter, OD to housing bore, and Height to groove depth. Verify dimensions against your old seal or equipment manual before ordering.

✅ Key Features of These TC Oil Seals for 20mm Shafts

🔒Double Lip TC Design — The primary spring-loaded lip retains oil and grease while the secondary dust lip blocks dirt, moisture, and debris from entering the bearing or gearbox.
🧱Nitrile (NBR) Rubber Construction — NBR compound resists petroleum-based oils, greases, and water, making these rotary shaft seals suitable for engines, gearboxes, and outdoor power equipment.
🔩Steel-Reinforced Shell — A rigid steel outer case ensures the seal presses firmly into the housing bore and maintains concentricity under operating loads, reducing the risk of seal walk-out.
📐Wide Size Range in One Listing — OD from 26mm to 52mm and heights from 4mm to 12mm cover dozens of common metric shaft seal applications, reducing the need to source from multiple vendors.
🌡️Broad Operating Temperature Range — Nitrile rubber typically performs from approximately -40°F to +250°F (-40°C to +120°C), covering most engine and drivetrain operating conditions.
📦Flexible Pack Quantities — Order 2, 5, 10, or 25 pieces to match your job size — whether it's a single repair or stocking your workshop with replacement 20mm shaft seals.

📐 Technical Specifications — TC Nitrile Rotary Shaft Oil Seal

Seal Type	TC (Double Lip with Garter Spring)
Inner Diameter (ID / Shaft Size)	20mm (≈0.787")
Outer Diameter (OD) Range	26mm (≈1.02") to 52mm (≈2.05") — see variant options
Height Range	4mm (≈0.16") to 12mm (≈0.47") — see variant options
Seal Material	Nitrile Rubber (NBR)
Shell Material	Steel (carbon steel)
Spring Type	Garter spring (primary lip)
Operating Temperature	Typically -40°F to +250°F (-40°C to +120°C)
Max Shaft Speed	Typically up to 4–6 m/s (contact us to confirm)
Max Dynamic Pressure	Typically up to 0.3 bar (4.4 psi)
Compatible Fluids	Petroleum oils, gear oils, greases, water
Dimension Standard	Metric (mm)
Pack Quantity Options	2, 5, 10, or 25 pieces
Color / Finish	See variant options
Country of Origin	Contact us to confirm

⚠️ Size Confirmation: With dozens of size combinations available, please double-check your ID × OD × Height before ordering. Measure your old seal or consult your equipment service manual. If unsure, contact us — we're happy to help.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size for my shaft?

Match the Inner Diameter (ID) to your shaft diameter — this product fits 20mm shafts. Then select the Outer Diameter (OD) to match your housing bore, and choose a Height that fits your seal groove depth. For example, 20 x 30 x 7mm means ID=20mm (≈0.787"), OD=30mm (≈1.181"), Height=7mm (≈0.276"). When in doubt, measure the old seal or consult your equipment manual.

What does 'TC' mean in TC oil seal?

TC stands for a double-lip seal design. The primary lip retains lubricant and the secondary (dust) lip excludes contaminants. This dual-barrier construction is generally more effective than single-lip (SC) seals in environments with dirt, moisture, or debris.

What is the load or pressure rating of these oil seals?

TC oil seals of this type are typically rated for low-to-moderate pressure applications (generally up to 0.3 bar / 4.4 psi dynamic pressure). They are designed for rotary shaft sealing, not high-pressure hydraulic systems. Contact us to confirm suitability for your specific application.

Can these seals be used outdoors or in wet environments?

Nitrile (NBR) rubber generally offers good resistance to petroleum-based oils, greases, and water. It is commonly used in outdoor equipment such as lawn mowers, tillers, and agricultural machinery. However, NBR is not recommended for exposure to strong solvents, brake fluid, or extreme UV/ozone environments. For those conditions, consider a Viton (FKM) seal.

What shaft speed and temperature range are these seals rated for?

Nitrile TC oil seals typically operate in a temperature range of approximately -40°F to +250°F (-40°C to +120°C) and are suitable for shaft surface speeds generally up to 4–6 m/s. Actual performance depends on lubrication, shaft finish, and operating conditions. Contact us to confirm for your application.

Are these seals compatible with metric or imperial shaft standards?

All dimensions listed are metric (mm). The 20mm ID corresponds to a 20mm shaft. For reference, 20mm ≈ 0.787 inches. These seals follow standard metric TC seal dimensions and are compatible with equipment using metric shaft and housing specifications.

How do I install a TC oil seal correctly?

Clean the housing bore and shaft. Lightly lubricate the seal lip with the fluid being sealed. Press the seal squarely into the housing using a seal driver or a flat block — never hammer directly on the seal face. Ensure the primary lip faces the fluid side. Avoid nicking or rolling the lip during installation.

How many seals come in each order?

You can choose your pack quantity at checkout: 2, 5, 10, or 25 pieces per order, depending on the size selected. Larger packs offer a lower per-unit cost and are ideal for workshop stock or fleet maintenance.

🛒 Select your size and quantity above, then add to cart — ships from our US warehouse.

TC Oil Seal 20mm Shaft — Nitrile Double Lip Rotary Shaft Seal (20 x 26~52 x 4~12mm)

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Beschreibung

TC Oil Seal for 20mm Shafts — Stop Leaks with a Nitrile Double Lip Rotary Shaft Seal

✅ Key Features of These TC Oil Seals for 20mm Shafts

📐 Technical Specifications — TC Nitrile Rotary Shaft Oil Seal

❓ Frequently Asked Questions

TC Oil Seal 20mm Shaft — Nitrile Double Lip Rotary Shaft Seal (20 x 26~52 x 4~12mm)

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