TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm
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TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mmTC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm

TC Oil Seal NBR Double Lip Skeleton Seal for Rotation Shaft — ID 20–28mm

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$5.41 USD
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In stock (500 units), ready to be shipped

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Description

TC NBR Double Lip Oil Seal — Stop Leaks on Rotating Shafts

If you're dealing with grease or oil weeping past a shaft seal — on a gearbox, pump, motor, or agricultural machine — a worn or undersized seal is almost always the culprit. These TC skeleton oil seals are designed for mechanics, maintenance technicians, and DIYers who need a reliable metric replacement without hunting through industrial catalogs.

Each seal features a fully encased metal skeleton (FB construction) with an NBR nitrile rubber body. The double-lip design includes a spring-loaded primary sealing lip to retain lubricant and a secondary dust lip to block contaminants. Available in inner diameters from 20mm (≈0.79") to 28mm (≈1.10"), with outer diameters up to 62mm (≈2.44") and heights of 5mm (≈0.20") to 10mm (≈0.39"). Sold in packs of 2, 5, 10, or 30 pieces.

Typical applications include gearbox output shaft seals, hydraulic pump shaft seals, electric motor end-cap seals, and agricultural equipment axle seals — anywhere a TC-type double lip oil seal for rotation shaft is needed in the 20–28mm ID range.

🔵 Compatibility Note: These are metric TC-type seals. Before ordering, measure your shaft ID, housing bore OD, and housing depth (height) precisely. All three dimensions must match your selected variant. Shaft surface finish of Ra 0.2–0.8 µm is recommended for optimal seal life.

✅ Key Features of These TC NBR Double Lip Oil Seals

  • 🔩FB Skeleton Construction — A fully encased metal ring maintains dimensional stability under pressure and prevents the seal body from distorting during press-fit installation.
  • 💧Double Lip Sealing — The spring-loaded primary lip retains oil and grease; the secondary dust lip blocks dirt, water, and debris from reaching the bearing — a key advantage of TC-type double lip oil seals over single-lip designs.
  • 🧪NBR Nitrile Rubber Body — Resistant to petroleum-based oils, hydraulic fluids, water, and mild chemicals; rated for continuous use from approximately -40°F to +250°F (-40°C to +120°C).
  • 📐Wide Size Selection — Inner diameters from 20mm to 28mm with over 50 OD/height combinations, covering a broad range of metric shaft seal replacement needs in one listing.
  • 📦Flexible Pack Quantities — Order 2 pieces for a single repair, 5 or 10 for a maintenance kit, or 30 for shop stock — all at per-unit pricing that scales with quantity.
  • ⚙️Press-Fit Installation — Standard interference-fit OD for direct housing installation without adhesive; compatible with typical metric bearing housings and gearbox end caps.

📐 Technical Specifications — TC NBR Skeleton Oil Seal

Seal Type TC (Double Lip with Metal Skeleton)
Construction FB — Fully Encased Metal Skeleton
Lip Material NBR (Nitrile Butadiene Rubber)
Inner Diameter (ID) Range 20mm – 28mm (≈0.79" – 1.10")
Outer Diameter (OD) Range 28mm – 62mm (≈1.10" – 2.44")
Height Range 5mm – 10mm (≈0.20" – 0.39")
Temperature Range Typically -40°C to +120°C (-40°F to +250°F)
Compatible Fluids Petroleum oils, hydraulic fluids, water, mild chemicals
Shaft Speed Generally up to 4–6 m/s (lubricated); see variant options
Installation Method Press-fit (interference fit OD)
Dimension Standard Metric (mm)
Pack Quantity Options 2 / 5 / 10 / 30 pcs
Spring Garter spring on primary lip
Exact Size See variant options
⚠️ Sizing Tip: If you are unsure of your seal dimensions, remove the old seal and measure the ID (shaft diameter), OD (housing bore), and height (housing depth) with calipers before selecting a variant. Do not rely on part numbers alone — cross-reference all three dimensions.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure three dimensions with calipers: the shaft inner diameter (ID), the housing bore outer diameter (OD), and the housing depth (height). For example, a 20*35*7mm seal has a 20mm ID (≈0.79"), 35mm OD (≈1.38"), and 7mm height (≈0.28"). All three must match your application. When in doubt, measure the old seal directly.

What does "TC" and "FB" mean on an oil seal?

"TC" indicates a double-lip seal design — a spring-loaded primary lip to retain lubricant plus a secondary dust lip to exclude contaminants. "FB" refers to the skeleton construction style: a fully encased metal ring that maintains the seal's shape and provides a rigid press-fit OD. This is the most common type used in gearboxes, pumps, and motors.

What is the maximum shaft speed these seals can handle?

NBR TC oil seals are generally rated for shaft surface speeds up to approximately 4–6 m/s under normal lubricated conditions. Actual limits depend on shaft surface finish (Ra 0.2–0.8 µm recommended), operating temperature, and lubrication. For high-speed applications, verify against your equipment's OEM specifications.

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

NBR rubber offers good resistance to petroleum-based oils, water, and mild chemicals. The secondary dust lip provides additional protection against moisture and contaminants entering from outside. However, NBR is generally not recommended for prolonged exposure to ozone, strong acids, or ketone-based fluids. For harsh outdoor or chemical environments, FKM (Viton) seals may be more appropriate.

What temperature range do NBR oil seals support?

NBR (nitrile rubber) typically performs reliably in a continuous temperature range of approximately -40°F to +250°F (-40°C to +120°C). Short-term peaks may be tolerated, but sustained high temperatures accelerate rubber degradation. For applications above +120°C, consider FKM alternatives.

Are these seals compatible with standard metric shaft sizes?

Yes. All sizes listed use metric dimensions (mm) and are compatible with standard metric shafts. The ID range covered is 20–28mm, with OD options from 28mm up to 62mm depending on the variant selected. These dimensions follow common DIN/ISO metric seal standards used in European and Asian machinery.

What applications are these TC oil seals suitable for?

These seals are generally used in gearboxes, hydraulic pumps, electric motors, agricultural equipment (tractors, tillers), automotive differentials, industrial gearboxes, and any rotating shaft application where fluid retention and dust exclusion are required. They are a direct replacement for TC-type seals in the 20–28mm ID range.

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

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