TC Oil Seal NBR Nitrile Double Lip with Spring — Rotary Shaft Seal (40–55mm ID)

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TC Oil Seal NBR Nitrile Double Lip with Spring — Rotary Shaft Seal (40–55mm ID)

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Inner Dia x Outer Dia: 40 x 50mm

Thickness: 7mm

Pack of Quantity (Pcs): 5

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$9.78 USD

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In stock (500 units), ready to be shipped

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TC Oil Seal NBR Nitrile Double Lip — Reliable Rotary Shaft Sealing for Machinery and Equipment

When a worn or wrong-sized shaft seal lets oil weep past the housing, it contaminates bearings, attracts grit, and turns a minor maintenance task into a costly repair. Mechanics, equipment operators, and DIY rebuilders who work on gearboxes, pumps, axles, and agricultural machinery need a TC oil seal that seats firmly, holds its lip contact under vibration, and resists the fluids it is meant to contain.

Each seal in this listing is a TC-type (double-lip) rotary shaft seal made from NBR nitrile rubber with a spring steel garter spring and a rigid metal outer case. Inner diameters range from 40mm (approx. 1.57") to 55mm (approx. 2.17"), outer diameters from 50mm (approx. 1.97") to 110mm (approx. 4.33"), and thickness options of 7mm (approx. 0.28"), 8mm (approx. 0.31"), 10mm (approx. 0.39"), and 12mm (approx. 0.47"). Available in packs of 5 or 10 pieces.

Typical use cases include gearbox output shaft sealing, hydraulic pump shaft seals, agricultural equipment axle seals, and electric motor bearing housing seals — anywhere a metric TC oil seal with a double lip is specified.

🔵 Compatibility Note: These are metric-dimensioned seals conforming generally to DIN 3760 / ISO 6194. Match your shaft OD to the Inner Diameter and your housing bore ID to the Outer Diameter before ordering. Select thickness to match your housing depth.

✅ Key Features of These TC Oil Seals

🔒Double-Lip TC Design — The primary spring-loaded lip seals oil in; the secondary dust lip keeps contaminants out, giving you two lines of defense in a single rotary shaft seal.
🌡NBR Nitrile Rubber Construction — Nitrile rubber resists petroleum-based oils, greases, and water across a working range of approximately -40°C to +120°C (-40°F to +248°F), covering most gearbox and pump environments.
🔩Spring Steel Garter Spring — The internal garter spring maintains consistent radial lip force on the shaft, compensating for minor shaft runout and lip wear over time without manual adjustment.
📐Wide Size Matrix — Inner diameters from 40mm to 55mm paired with outer diameters up to 110mm and four thickness options let you find the exact metric TC oil seal size your application requires without custom ordering.
🏭Rigid Metal Outer Case — The pressed-steel outer shell provides a firm interference fit in the housing bore, resisting rotation and blowout under normal operating pressures up to approximately 0.3 bar.
📦Multi-Pack Value (5 or 10 pcs) — Order a pack of 5 for a single repair or 10 pieces for fleet maintenance and rebuild kits, reducing per-unit cost and keeping spares on hand for the next service interval.

📐 Technical Specifications — TC Rotary Shaft Oil Seal

Seal Type	TC (Double Lip with Spring)
Material	NBR Nitrile Rubber body, Spring Steel garter spring, Metal outer case
Inner Diameter (Shaft Size)	40mm, 42mm, 45mm, 50mm, 52mm, 55mm (see variant options)
Outer Diameter (Bore Size)	50mm to 110mm (see variant options)
Thickness (Width)	7mm (approx. 0.28"), 8mm (approx. 0.31"), 10mm (approx. 0.39"), 12mm (approx. 0.47")
Pack Quantity	5 pcs or 10 pcs per order
Operating Temperature	Typically -40°C to +120°C (-40°F to +248°F)
Max Shaft Speed	Contact us to confirm for your application
Max Differential Pressure	Typically up to approx. 0.3 bar (4.4 psi)
Dimensional Standard	Generally DIN 3760 / ISO 6194 metric
Fluid Compatibility	Petroleum oils, greases, water (not recommended for ozone, strong UV, or certain synthetics)
Color / Finish	See variant options

⚠ Sizing Tip: Always measure your shaft OD and housing bore ID with calipers before ordering. A seal that is even 0.5mm too small in OD will not seat properly. If you are unsure, contact us with your measurements.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure the shaft diameter (inner diameter) and the bore diameter (outer diameter) of the housing. Match those to the Inner Dia x Outer Dia option. For example, a 40mm shaft in a 55mm bore needs a 40 x 55mm seal. Thickness should match the housing depth — typically 7mm, 8mm, 10mm, or 12mm. In inches: 40mm is approximately 1.57", 50mm is approximately 1.97", 55mm is approximately 2.17". When in doubt, measure twice and refer to the equipment manual.

What does TC mean on an oil seal?

TC designates a double-lip seal design with a spring-loaded primary lip. The secondary lip acts as a dust excluder, while the spring keeps the primary lip in constant contact with the shaft. This configuration generally provides better sealing performance than single-lip (SC) seals in applications with moderate shaft runout or contamination.

What is the pressure rating of these seals?

TC oil seals are designed for low-to-moderate pressure applications — typically up to about 0.3 bar (4.4 psi) of differential pressure. They are not intended for high-pressure hydraulic systems. For exact pressure ratings, please contact us to confirm suitability for your application.

Can these seals be used outdoors or in wet environments?

NBR nitrile rubber generally offers good resistance to water, oil, and grease, making it suitable for many outdoor and wet environments. However, NBR is not recommended for prolonged exposure to ozone, strong UV, or certain synthetic fluids. For harsh outdoor or marine applications, consider FKM (Viton) seals instead.

What shaft standards are these seals compatible with?

These are metric-dimensioned TC oil seals compatible with metric shafts and housings. They generally conform to DIN 3760 / ISO 6194 standards. The inner diameter fits the shaft directly — no thread is involved. Confirm your shaft and bore dimensions match the selected variant before ordering.

What temperature range can NBR nitrile seals handle?

NBR nitrile rubber typically operates in a temperature range of approximately -40°C to +120°C (-40°F to +248°F). Performance at the extremes of this range may vary depending on the specific fluid and operating conditions. Contact us if your application runs at sustained high temperatures.

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 bore using a seal driver or a flat plate — never hammer directly on the seal face. Ensure the spring side faces inward (toward the fluid). Avoid nicking the lip on sharp shaft edges; use a chamfer or installation sleeve if needed.

🛒 Select your size (Inner Dia x Outer Dia), thickness, and pack quantity above, then add to cart — ships from our US warehouse.

TC Oil Seal NBR Nitrile Double Lip with Spring — Rotary Shaft Seal (40–55mm ID)

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Description

TC Oil Seal NBR Nitrile Double Lip — Reliable Rotary Shaft Sealing for Machinery and Equipment

✅ Key Features of These TC Oil Seals

📐 Technical Specifications — TC Rotary Shaft Oil Seal

❓ Frequently Asked Questions

TC Oil Seal NBR Nitrile Double Lip with Spring — Rotary Shaft Seal (40–55mm ID)

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