TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring
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TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal RingTC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring

TC Oil Seals ID 18/19/20mm – FKM Rubber Dual Lip Rotary Shaft Seal Ring

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$3.25 USD
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In stock (500 units), ready to be shipped

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Description

TC Skeleton Oil Seals ID 18–20mm — Reliable Rotary Shaft Sealing for Gearboxes, Pumps & Motors

Leaking shaft seals cause oil loss, contamination, and premature bearing failure — problems that shut down equipment at the worst possible time. Whether you are rebuilding a gearbox, servicing a hydraulic pump, or replacing a worn seal on agricultural machinery, finding the exact metric TC oil seal in the right size should not require a trip to an industrial supplier. These TC skeleton oil seals with ID 18–20mm are stocked in over 96 size combinations so you can get the precise fit your application demands, shipped directly from our US warehouse.

Each seal is a TC-type (double lip) skeleton oil seal constructed with an FKM (Viton) rubber compound bonded over a rigid steel skeleton case. Available inner diameters span 18mm (≈0.709"), 19mm (≈0.748"), and 20mm (≈0.787"), with outer diameters ranging from 25mm (≈0.984") to 55mm (≈2.165") and thicknesses from 4mm (≈0.157") to 12mm (≈0.472"). Sold individually (1 PCS) or in value packs of 5 PCS — select your exact ID × OD × Thickness combination from the variant options above.

These FKM dual lip rotary shaft seals are commonly used in industrial gearbox shaft sealing, hydraulic pump shaft seals, electric motor end-cap sealing, agricultural equipment drive shafts, and light-duty automotive differential or transmission applications where a metric TC seal is specified.

🔵 Compatibility Note: These are metric TC skeleton oil seals conforming generally to DIN 3760 / ISO 6194. Verify your shaft ID, bore OD, and housing depth in millimeters before ordering. Not designed for inch-standard shafts unless metric dimensions match.

✅ Key Features of These TC FKM Dual Lip Rotary Shaft Oil Seals

  • 🛡️Dual Lip (TC) Design — The primary lip retains lubricant while the secondary dust lip excludes dirt, water, and debris, making these seals well-suited for outdoor and industrial rotary shaft sealing applications.
  • 🔥FKM (Viton) Rubber Compound — Resists petroleum oils, hydraulic fluids, fuels, and many chemicals; typically rated from -20°C to +200°C (-4°F to +392°F), outperforming standard NBR seals in high-temperature or chemically aggressive environments.
  • ⚙️Rigid Steel Skeleton Case — The metal insert maintains dimensional stability under press-fit installation and prevents the seal from distorting in the bore, ensuring consistent contact pressure around the shaft.
  • 📐96+ Size Combinations — ID 18mm, 19mm, and 20mm with OD options from 25mm to 55mm and thicknesses from 4mm to 12mm, covering a wide range of metric gearbox and pump shaft seal replacements in a single listing.
  • 🔩Spring-Loaded Primary Lip — A garter spring maintains consistent radial load on the shaft lip, compensating for minor shaft runout and wear over time to extend service life in rotating shaft assemblies.
  • 📦Flexible Pack Quantities — Order a single seal (1 PCS) for a one-off repair or a 5-pack for fleet maintenance, workshop stock, or multi-seal equipment rebuilds — both options available for every size.

📐 Technical Specifications — TC Skeleton FKM Dual Lip Oil Seals

Seal Type TC (Double Lip Skeleton Oil Seal)
Inner Diameter (ID) 18mm (≈0.709"), 19mm (≈0.748"), 20mm (≈0.787")
Outer Diameter (OD) 25mm – 55mm (≈0.984" – 2.165"); see variant options
Thickness 4mm – 12mm (≈0.157" – 0.472"); see variant options
Lip Material FKM (Fluoroelastomer / Viton)
Case / Skeleton Carbon steel (rigid insert)
Lip Configuration Dual lip — primary sealing lip + secondary dust exclusion lip
Spring Type Garter spring (primary lip)
Temperature Range Typically -20°C to +200°C (-4°F to +392°F)
Dimensional Standard Generally DIN 3760 / ISO 6194 (metric)
Shaft Surface Finish Typically Ra 0.2–0.8 µm recommended
Installation Method Press-fit into bore (seal driver or flat block recommended)
Pack Quantity 1 PCS or 5 PCS (select above)
Color / Finish See variant options
Country of Origin Contact us to confirm
⚠️ Size Tip: Always measure your existing seal or housing bore before ordering. The size format is ID × OD × Thickness in millimeters (e.g., 20*35*7mm). If your seal is worn or damaged, measure the shaft diameter (= ID) and the housing bore (= OD) directly.

❓ 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). All three must match your application. For example, a 20*40*7mm seal has a 20mm (≈0.787") ID, 40mm (≈1.575") OD, and 7mm (≈0.276") thickness. If replacing a worn seal, measure the shaft diameter directly for the ID and the bore for the OD. Always cross-reference with your equipment service manual when available.

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

TC-type rotary shaft oil seals are generally designed for low-to-medium pressure applications, typically up to 0.3 MPa (≈43 psi) of dynamic pressure. They are not intended for high-pressure hydraulic circuits. For higher-pressure systems, a cassette or labyrinth seal is generally recommended. Contact us to confirm suitability for your specific operating conditions.

Are these FKM seals suitable for outdoor or corrosive environments?

Yes. FKM (Viton) rubber offers excellent resistance to petroleum oils, hydraulic fluids, fuels, and many industrial chemicals. It typically withstands temperatures from -20°C to +200°C (-4°F to +392°F), making these seals well-suited for outdoor power equipment, marine machinery, and chemically aggressive environments where standard NBR seals would degrade prematurely.

What shaft and bore standards are these seals compatible with?

These are metric TC skeleton oil seals that generally conform to DIN 3760 / ISO 6194 dimensional standards. They are designed for metric shafts and bores. They are not intended for inch-standard shafts unless the metric dimensions happen to match your application. Always verify your shaft and bore diameters in millimeters before ordering.

How do I install a TC dual lip oil seal correctly?

1. Clean the housing bore and shaft thoroughly, removing all old sealant or debris.
2. Lightly lubricate the seal lips with the fluid being sealed (oil or grease).
3. Press the seal squarely into the bore using a seal driver or a flat block — never strike the seal face directly with a hammer.
4. Ensure the primary lip faces the fluid (oil) side and the secondary dust lip faces outward.
5. Press until the seal face is flush with or just below the bore surface, as specified by your equipment manual.

Can I use these seals in gearboxes, hydraulic pumps, or automotive applications?

Yes. TC skeleton oil seals are widely used in industrial gearboxes, hydraulic pumps, electric motors, agricultural equipment drive shafts, and light automotive differential or transmission applications. The dual lip design provides both lubricant retention and dust exclusion, making them a versatile choice for most rotating shaft assemblies that specify a metric TC seal.

What is the difference between a single lip and a dual lip (TC) oil seal?

A single lip seal has one sealing lip that retains lubricant on the fluid side. A dual lip (TC) seal adds a secondary lip that acts as a dust and contaminant excluder on the atmosphere side. This makes TC seals the preferred choice in environments where dirt, water, or debris may contact the shaft — such as outdoor power equipment, agricultural machinery, and industrial gearboxes operating in dusty or wet conditions.

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

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