TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft
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TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary ShaftTC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary ShaftTC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary ShaftTC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary ShaftTC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary ShaftTC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary ShaftTC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft

TC FB TG4 NBR Skeleton Oil Seal Rings ID 52mm-200mm Lip Seal For Rotary Shaft

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Price:
$4.28 USD
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In stock (500 units), ready to be shipped

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Description

TC FB TG4 NBR Skeleton Oil Seal Rings — Dual-Lip Rotary Shaft Seals for Demanding Applications

When a leaking shaft seal brings a pump, gearbox, or motor to a standstill, every minute of downtime costs money. Maintenance technicians, equipment rebuilders, and DIY mechanics who work on rotating machinery need TC NBR skeleton oil seal rings they can trust to hold under pressure — without hunting through a dozen suppliers for the right bore size.

These TC FB TG4 NBR skeleton oil seal rings feature a steel-reinforced skeleton body bonded to a nitrile rubber (NBR) sealing element. The dual-lip TC profile combines a primary sealing lip that retains lubricant with a secondary dust-exclusion lip that blocks contaminants. Inner diameters span 52 mm to 200 mm (~2.05" to 7.87"), outer diameters from 70 mm to 250 mm (~2.76" to 9.84"), and heights from 8 mm to 18 mm (~0.31" to 0.71"), covering 161 size combinations across the range.

Typical use cases include agricultural gearbox shaft seals, industrial pump lip seals for rotary shafts, automotive differential and axle seals, hydraulic cylinder rod seals, and electric motor bearing-end covers — anywhere a reliable rotary shaft seal is needed to keep oil in and dirt out.

⚙️ Compatibility: Designed for rotary shaft applications. Verify I.D., O.D., and height against your housing bore and shaft diameter before ordering. NBR compound is compatible with mineral oils, gear oils, and most hydraulic fluids; not recommended for use with phosphate-ester or silicone-based fluids.

✅ Key Features of These TC NBR Skeleton Oil Seal Rings

  • 🔩 Steel-Reinforced Skeleton Body — Rigid metal insert maintains dimensional stability under press-fit installation and prevents distortion in high-temperature environments.
  • 💧 Dual-Lip TC Profile — Primary lip retains lubricant; secondary lip excludes dust and debris, extending service intervals in contaminated environments.
  • 🧪 NBR Sealing Element — Nitrile rubber compound resists mineral oils, gear oils, and hydraulic fluids across a working temperature range of typically −40 °C to +120 °C (−40 °F to +248 °F).
  • 📐 161 Size Combinations — I.D. 52–200 mm, O.D. 70–250 mm, heights 8–18 mm; one listing covers a full range of rotary shaft seal sizes for pumps, gearboxes, and motors.
  • 🏭 Press-Fit Installation — Uniform outer diameter tolerance allows straightforward press-fit into standard housing bores without adhesive or special tooling in most applications.
  • 🔄 Broad Application Compatibility — Suitable for agricultural equipment, industrial pumps, automotive axles, hydraulic cylinders, and electric motor end covers wherever a lip seal for rotary shafts is required.

📐 Technical Specifications — TC NBR Skeleton Oil Seal Rings

Seal Type TC (Double Lip) / FB / TG4
Material NBR (Nitrile Butadiene Rubber) + Steel Skeleton
Inner Diameter (I.D.) Range 52 mm – 200 mm (approx. 2.05" – 7.87")
Outer Diameter (O.D.) Range 70 mm – 250 mm (approx. 2.76" – 9.84")
Height Range 8 mm – 18 mm (approx. 0.31" – 0.71")
Lip Profile Dual lip — primary sealing lip + secondary dust lip
Operating Temperature Typically −40 °C to +120 °C (−40 °F to +248 °F)
Compatible Fluids Mineral oil, gear oil, hydraulic fluid (mineral-based)
Installation Method Press-fit into housing bore
Pack Size See variant options
Exact I.D. × O.D. × Height See variant options

❓ Frequently Asked Questions

How do I choose the correct oil seal size?

Measure the shaft diameter (this equals the seal I.D.), the housing bore diameter (this equals the seal O.D.), and the housing depth (this equals the seal height). All three dimensions must match your application. Use calipers for accuracy — even a 0.5 mm mismatch can cause leaks or prevent proper seating.

What is the difference between TC, FB, and TG4 designations?

TC indicates a double-lip seal with a primary oil-retention lip and a secondary dust-exclusion lip. FB and TG4 are manufacturer/standard designations that describe the same dual-lip skeleton seal geometry. All three terms refer to the same seal profile offered in this listing.

Is NBR rubber compatible with my fluid?

NBR (nitrile) is compatible with mineral-based oils, gear oils, ATF, and most hydraulic fluids. It is not recommended for phosphate-ester hydraulic fluids (e.g., Skydrol), silicone oils, or ketone-based solvents. If your application uses synthetic esters or aggressive chemicals, consider a Viton (FKM) seal instead.

What temperature range can these seals handle?

NBR compound typically performs from −40 °C to +120 °C (−40 °F to +248 °F) in continuous service. Short-term peaks up to +130 °C may be tolerated, but sustained high temperatures accelerate lip wear and reduce seal life. For applications above 120 °C, a Viton or PTFE-lipped seal is more appropriate.

How do I install a skeleton oil seal without damaging it?

Clean the housing bore and shaft. Lightly lubricate the seal lip with the same oil used in the application. Use a flat press plate or a seal driver of the correct diameter to press the seal squarely into the bore — never hammer directly on the seal face. Press until the seal face is flush with or just below the housing surface. Avoid nicking the lip on keyways or splines during shaft insertion.

Can I use these seals on high-speed rotary shafts?

TC skeleton seals are suitable for moderate rotary shaft speeds. Typical NBR lip seals perform reliably up to approximately 4–8 m/s shaft surface speed depending on shaft finish and lubrication. For very high-speed applications (above 8 m/s), ensure the shaft has a fine surface finish (Ra 0.2–0.8 µm) and consider a PTFE-lipped variant for reduced friction.

What shaft surface finish is required for a good seal?

The shaft surface under the seal lip should have a ground or polished finish with a roughness of Ra 0.2–0.8 µm (8–32 µin). Avoid longitudinal machining marks, which can act as leak paths. A lead-in chamfer of 15–20° at the shaft end helps guide the lip over the shaft without rolling it back during installation.

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

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