TC FB Skeleton Oil Seal Ring ID=52~400mm Rotary Shaft Sealing NBR Double LipSeal

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TC FB Skeleton Oil Seal Ring ID=52~400mm Rotary Shaft Sealing NBR Double LipSeal

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Size（I.D x O.D x Height）: 52*72*8mm

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TC FB Skeleton Oil Seal — NBR Double Lip Rotary Shaft Sealing, ID 52–400mm

When a worn or incorrectly sized shaft seal causes oil leaks, contamination, or premature bearing failure, finding an exact-fit replacement becomes urgent. Maintenance technicians, equipment rebuilders, and DIY mechanics working on gearboxes, pumps, axles, and hydraulic cylinders need a reliable source for TC FB skeleton oil seals across a wide dimensional range — without waiting on custom orders.

These TC FB skeleton oil seals feature a steel-reinforced skeleton body with an NBR (nitrile butadiene rubber) double-lip sealing element. The primary lip retains lubricant while the secondary dust lip blocks contaminants. Available in 196 size variants, inner diameters span 52–400mm (approx. 2.05–15.75 in.), outer diameters 72–440mm (approx. 2.83–17.32 in.), and heights 8–20mm (approx. 0.31–0.79 in.).

Typical applications include industrial gearbox output shafts, agricultural equipment axle seals, automotive differential pinion seals, pump shaft sealing in hydraulic systems, and electric motor end-shield sealing — anywhere a TC-type double-lip rotary shaft seal is specified. The NBR compound suits mineral oil, grease, and mild chemical environments, making these seals a practical choice for rotary shaft sealing in general industrial and mobile equipment maintenance.

⚙️ Compatibility Note: These are TC-type (double-lip) skeleton oil seals. Verify your shaft I.D., housing O.D., and seal height before ordering. Refer to your equipment service manual or measure the existing seal directly.

✅ Key Features of These TC FB Skeleton Oil Seals

🔩 Steel Skeleton Construction — Rigid metal insert maintains dimensional stability under press-fit installation and operating loads, preventing distortion in the housing bore.
🛡️ NBR Double-Lip Design — Primary sealing lip retains lubricant; secondary dust lip excludes dirt, debris, and moisture, extending bearing and lubricant service life.
📐 196 Size Variants — I.D. range 52–400mm covers a broad spectrum of shaft sizes for industrial gearboxes, axles, pumps, and motors without custom fabrication.
🌡️ NBR Compound Compatibility — Nitrile rubber performs reliably with mineral oils, greases, and hydraulic fluids across a typical operating temperature range of approximately −40°C to +120°C (−40°F to +248°F).
🔄 TC-Type Rotary Shaft Sealing — Designed for rotating shaft applications; the garter spring maintains consistent lip contact pressure as the shaft rotates, compensating for minor shaft runout.
🔧 Direct Replacement Fit — Standard TC FB dimensional format matches OEM seal specifications on common industrial and mobile equipment, simplifying sourcing for maintenance and rebuild work.

📐 Technical Specifications — TC FB Skeleton Oil Seal

Seal Type	TC FB (Double Lip, Skeleton)
Lip Material	NBR (Nitrile Butadiene Rubber)
Skeleton Material	Steel
Inner Diameter (I.D.)	52–400mm (approx. 2.05–15.75 in.) — See variant options
Outer Diameter (O.D.)	70–440mm (approx. 2.76–17.32 in.) — See variant options
Height (Width)	8–20mm (approx. 0.31–0.79 in.) — See variant options
Number of Lips	2 (Primary sealing lip + secondary dust lip)
Spring Type	Garter spring (retains primary lip contact)
Operating Temperature	Typically −40°C to +120°C (−40°F to +248°F) for NBR compound
Compatible Fluids	Mineral oils, greases, hydraulic fluids (non-aggressive)
Application Type	Rotary shaft sealing
Installation Method	Press-fit into housing bore
Weight	See variant options
Quantity per Order	1 piece

❓ Frequently Asked Questions

How do I identify the correct seal size for my application?

Measure three dimensions on your existing seal or shaft housing: Inner Diameter (I.D. = shaft diameter), Outer Diameter (O.D. = housing bore diameter), and Height (axial width of the seal). All three must match the variant you select. If the old seal is damaged, measure the shaft and housing bore directly with calipers. The variant label format is I.D. × O.D. × Height in mm.

What does "TC FB" mean, and how is it different from other seal types?

TC refers to a double-lip oil seal design: one primary lip for oil retention and one secondary lip for dust exclusion. FB indicates a fully encased metal skeleton (the steel insert is fully covered by rubber on the outer diameter). This differs from SC (single lip) or TC seals with an exposed metal OD. The TC FB design provides good housing bore sealing and is common in industrial and mobile equipment.

Is NBR the right material for my application?

NBR (nitrile) is suitable for mineral oils, petroleum-based greases, hydraulic fluids, and water. It is not recommended for use with synthetic esters, phosphate ester fluids, ketones, or strong acids. If your application involves these fluids, a FKM (Viton) seal would be more appropriate. For standard gearbox, axle, or pump applications using conventional lubricants, NBR is the standard choice.

What is the operating temperature range for these seals?

NBR compound typically performs between −40°C and +120°C (−40°F to +248°F) under continuous operation. Short-term peaks up to approximately +130°C may be tolerated, but sustained high temperatures accelerate lip wear and reduce seal life. If your application regularly exceeds +120°C, consider an FKM-compound seal instead.

Can these seals handle shaft runout or misalignment?

The garter spring in TC-type seals maintains consistent radial lip contact pressure, which provides some tolerance for minor dynamic runout — typically up to 0.2–0.5mm TIR depending on shaft speed and seal size. Excessive runout, misalignment, or shaft surface roughness beyond Ra 0.2–0.8 µm will accelerate lip wear. Ensure the shaft surface is smooth and the housing bore is concentric before installation.

How should I install a TC FB skeleton oil seal correctly?

Clean the housing bore and shaft thoroughly before installation. Apply a thin film of the system lubricant to the seal lip and the shaft surface. Press the seal squarely into the housing bore using a flat driver or seal installation tool — never strike the seal face directly with a hammer. Ensure the seal sits flush or to the specified depth. Protect the seal lip from sharp shaft edges or keyways during installation using a sleeve or tape.

How do I choose between the 8mm, 10mm, 12mm, and larger height options for the same I.D./O.D.?

The seal height must match the axial depth of your housing bore recess. Measure the depth of the seal cavity in the housing, or check the OEM part number specification. Using a seal that is too thin may leave it recessed and unsupported; too thick and it will protrude. When replacing an existing seal, match the height of the original part exactly. If you are unsure, contact us to confirm before ordering.

🛒 Select your Size (I.D. × O.D. × Height) above, then add to cart.

TC FB Skeleton Oil Seal Ring ID=52~400mm Rotary Shaft Sealing NBR Double LipSeal

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Beschreibung

TC FB Skeleton Oil Seal — NBR Double Lip Rotary Shaft Sealing, ID 52–400mm

✅ Key Features of These TC FB Skeleton Oil Seals

📐 Technical Specifications — TC FB Skeleton Oil Seal

❓ Frequently Asked Questions

TC FB Skeleton Oil Seal Ring ID=52~400mm Rotary Shaft Sealing NBR Double LipSeal

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