TC Skeleton Oil Seal Rings — NBR Double Lip, Rotary Shaft Sealing, ID 16/17/18/19mm

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TC Skeleton Oil Seal Rings — NBR Double Lip, Rotary Shaft Sealing, ID 16/17/18/19mm

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Sizes (ID x OD x Thickness): 16 x 21 x 6mm

Packing QTY (Piece): 2 PCS

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$4.68 USD

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In stock (500 units), ready to be shipped

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TC Oil Seal Rings — NBR Double Lip for Reliable Rotary Shaft Sealing

When a worn or incorrectly sized oil seal lets lubricant leak past the shaft, the result is messy, costly, and often leads to premature bearing failure. Whether you are rebuilding a gearbox, servicing an agricultural machine, or replacing a seal on an electric motor, finding the exact metric size you need should not require a trip to a specialty shop. These TC skeleton oil seal rings are stocked in a wide range of ID 16, 17, 18, and 19mm sizes so you can get the right fit the first time.

Each seal is a TC-type (double-lip) skeleton oil seal made from NBR (nitrile butadiene rubber) with a steel inner skeleton for dimensional stability. Available in inner diameters of 16mm (approx. 0.63 in), 17mm (approx. 0.67 in), 18mm (approx. 0.71 in), and 19mm (approx. 0.75 in), with outer diameters ranging from 21mm to 48mm and thicknesses from 3mm to 12mm. Sold in 1 PCS or 2 PCS packs — select your exact size and quantity above.

These seals are well suited for gearbox output shaft sealing, pump shaft applications, agricultural equipment maintenance, and general industrial machinery repair where a metric TC oil seal with NBR double lip construction is required.

ℹ️ Compatibility Note: These are metric TC-type oil seals. Verify your shaft ID, housing OD, and housing depth (thickness) before ordering. Dimensions are listed as ID x OD x Thickness in millimeters. Not designed for high-pressure hydraulic circuits.

✅ Key Features of These TC Oil Seal Rings

🔧TC Double-Lip Design — The primary lip retains lubricant while the secondary dust lip blocks contaminants, providing dual-barrier protection for rotary shaft sealing in dirty or wet environments.
🧱Steel Skeleton Reinforcement — An internal steel ring maintains the seal circular shape under press-fit installation and prevents distortion during operation, ensuring consistent contact with the shaft.
🛢️NBR Rubber Construction — Nitrile butadiene rubber offers solid resistance to petroleum-based oils, greases, and water — the most common fluids found in gearboxes, motors, and agricultural equipment.
📐Wide Metric Size Range — Inner diameters of 16, 17, 18, and 19mm with dozens of OD and thickness combinations, covering a broad range of standard metric bore housings without custom ordering.
⚙️Suitable for Common Industrial Applications — Designed for use in gearboxes, electric motors, pumps, and agricultural machinery where a reliable NBR TC oil seal replacement is needed.
📦Flexible Pack Quantities — Available in 1 PCS or 2 PCS packs so you can order exactly what you need for a single repair or keep a spare on hand without overstocking.

📐 Technical Specifications — TC Skeleton Oil Seal

Seal Type	TC (Double Lip, Skeleton)
Material	NBR (Nitrile Butadiene Rubber) with steel inner skeleton
Inner Diameter (ID)	16mm (approx. 0.63 in), 17mm (approx. 0.67 in), 18mm (approx. 0.71 in), 19mm (approx. 0.75 in)
Outer Diameter (OD)	21mm to 48mm (varies by variant; see variant options)
Thickness	3mm to 12mm (varies by variant; see variant options)
Lip Configuration	Double lip (primary sealing lip + secondary dust lip)
Operating Temperature	Typically -40 C to +120 C (-40 F to +248 F) for NBR
Shaft Speed	Generally up to 4 to 8 m/s (contact us to confirm for your application)
Pressure Rating	Low-to-medium pressure; typically up to 0.05 MPa static
Compatible Fluids	Petroleum-based oils, greases, water (not for aromatic fuels or ozone exposure)
Dimension Format	ID x OD x Thickness (mm)
Pack Quantity	1 PCS or 2 PCS (select above)
Application Standards	See variant options

⚠️ Before You Order: Measure your existing seal or housing carefully. The three critical dimensions are ID (shaft diameter), OD (bore diameter), and thickness (housing depth). An incorrect size will not seal properly. If you are unsure, contact us to confirm.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure the shaft inner diameter (ID), the bore outer diameter (OD), and the housing depth (thickness). All three dimensions must match your application. For example, a 17 x 35 x 7mm seal means ID 17mm (approx. 0.67 in), OD 35mm (approx. 1.38 in), thickness 7mm (approx. 0.28 in). When in doubt, prioritize the shaft diameter first, then confirm OD and thickness against your housing. If your existing seal is worn, measure the housing bore directly.

What does TC double lip mean on an oil seal?

TC (Type C) oil seals feature two sealing lips: a primary lip that retains lubricant inside the housing and a secondary dust lip that blocks dirt, water, and debris from entering. This dual-lip design generally provides better protection than single-lip (SC) seals in environments with contamination or moisture exposure.

What is the pressure rating for these oil seals?

TC skeleton oil seals are typically designed for low-to-medium pressure applications. They are generally rated for static pressures up to approximately 0.05 MPa and are not intended for high-pressure hydraulic systems. For dynamic or elevated-pressure applications, contact us to confirm suitability.

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

NBR (nitrile rubber) offers good resistance to water, petroleum-based oils, and mild chemicals, making it suitable for many outdoor and wet applications. However, NBR is generally not recommended for prolonged exposure to ozone, UV radiation, or aromatic/chlorinated solvents. For harsh chemical environments, FKM (Viton) seals are typically a better choice.

What shaft speed can these TC oil seals handle?

NBR TC oil seals are typically suitable for shaft surface speeds up to approximately 4 to 8 m/s, depending on the specific size, lubrication conditions, and operating temperature. For high-speed applications, verify the shaft surface speed against the seal rated limit before installation. Contact us to confirm for your specific use case.

What equipment are these oil seals compatible with?

These TC skeleton oil seals are commonly used in gearboxes, electric motors, pumps, agricultural equipment (tractors, tillers, combines), automotive differentials, and general industrial machinery. They are compatible with standard metric bore housings. Always verify the ID, OD, and thickness match your specific application before ordering.

How do I install a TC oil seal correctly?

Clean the housing bore and shaft before installation. Apply a thin film of compatible grease or oil to the seal lip and the shaft surface. Press the seal squarely into the bore using a seal driver or a flat block — never hammer directly on the seal face. Ensure the seal sits flush or slightly below the housing surface. The primary lip should face inward toward the lubricant.

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

TC Skeleton Oil Seal Rings — NBR Double Lip, Rotary Shaft Sealing, ID 16/17/18/19mm

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TC Oil Seal Rings — NBR Double Lip for Reliable Rotary Shaft Sealing

✅ Key Features of These TC Oil Seal Rings

📐 Technical Specifications — TC Skeleton Oil Seal

❓ Frequently Asked Questions

TC Skeleton Oil Seal Rings — NBR Double Lip, Rotary Shaft Sealing, ID 16/17/18/19mm

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