NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm
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NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mmNBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm

NBR TC Oil Seal 20mm Bore — R23 Double-Lip Rotary Shaft Seal, OD 26–38mm, Width 4–10mm

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Beschreibung

NBR TC Oil Seal 20mm Bore — Stop Leaks with a Reliable R23 Double-Lip Rotary Shaft Seal

If you're dealing with oil weeping past a shaft seal on a gearbox, axle, pump, or engine — you know how quickly a small leak turns into a big mess. Mechanics, equipment owners, and DIY repair enthusiasts who need an exact-fit replacement for a 20mm shaft will find this NBR TC oil seal covers a wide range of housing sizes without having to source from multiple suppliers.

Each seal in this listing features a 20mm inner diameter (ID) and is available in outer diameters (OD) from 26mm to 38mm and widths (heights) from 4mm to 10mm — giving you the flexibility to match your specific housing bore and depth. The body is constructed from nitrile rubber (NBR) bonded to a steel shell, with a TC (twin-contact / double-lip) arrangement: a primary sealing lip retains oil or grease, and a secondary dust lip keeps contaminants out. Sizes are expressed as ID × OD × Height in millimeters (e.g., 20 × 30 × 7mm ≈ 0.787″ × 1.181″ × 0.276″).

These rotary shaft seals are commonly used in automotive differentials, manual gearboxes, agricultural equipment, small engine crankshafts, hydraulic pumps, and industrial conveyor drives — anywhere a 20mm shaft passes through a sealed housing and a reliable NBR TC double-lip oil seal is required.

🔵 Compatibility: Fits 20mm metric shafts. Conforms to R23 / DIN 3760 radial shaft seal standard. Select the OD and width that match your housing bore and depth. Verify all three dimensions before ordering.

✅ Key Features of These NBR TC Double-Lip Rotary Shaft Oil Seals

  • 🔩TC Double-Lip Design — The primary lip seals oil and grease in; the secondary dust lip keeps dirt and moisture out, making this NBR TC oil seal suitable for both lubrication retention and contamination exclusion.
  • 🧱NBR Nitrile Rubber Construction — Nitrile rubber resists petroleum-based oils, greases, and hydraulic fluids across a wide operating temperature range (typically -40°F to +250°F / -40°C to +120°C), making it the standard material for rotary shaft seals in automotive and industrial use.
  • 🔧Steel-Reinforced Shell — A bonded steel outer case provides dimensional stability during press-fit installation and maintains a secure interference fit in the housing bore, reducing the risk of the seal spinning or walking out under vibration.
  • 📐Wide Size Range in One Listing — With ODs from 26mm to 38mm and widths from 4mm to 10mm, this listing covers dozens of common 20mm shaft seal applications — from compact gearboxes to larger axle housings — without needing to search across multiple SKUs.
  • 📦Flexible Pack Quantities — Available in packs of 2, 5, 8, 10, 20, 25, or 50 pieces. Order a single replacement pair or stock up for fleet maintenance and workshop inventory at a lower per-unit cost.
  • 🏭R23 / DIN 3760 Standard — Manufactured to the R23 radial shaft seal standard, ensuring dimensional interchangeability with OEM and aftermarket seals in metric equipment from automotive, agricultural, and industrial machinery manufacturers.

📐 Technical Specifications — NBR TC Rotary Shaft Oil Seal

Seal Type TC (Double-Lip / Twin Contact) Radial Shaft Seal
Standard R23 / DIN 3760
Inner Diameter (Shaft Size) 20mm (≈0.787″)
Outer Diameter (OD) 26mm – 38mm (≈1.024″ – 1.496″) — see variant options
Width / Height 4mm – 10mm (≈0.157″ – 0.394″) — see variant options
Lip Material NBR (Nitrile Butadiene Rubber)
Shell Material Carbon steel (bonded to rubber)
Lip Arrangement Double lip (primary sealing lip + secondary dust lip)
Operating Temperature Typically -40°F to +250°F (-40°C to +120°C)
Media Compatibility Petroleum-based oils, greases, hydraulic fluids
Max Dynamic Pressure Generally up to ~0.3 bar (4.4 psi)
Installation Method Press-fit into housing bore
Pack Quantity See variant options (2 / 5 / 8 / 10 / 20 / 25 / 50 pcs)
Color / Finish Contact us to confirm
⚠️ Size Verification: Always confirm all three dimensions — inner diameter (shaft size), outer diameter (housing bore), and width (housing depth) — before ordering. If you are unsure of your seal dimensions, measure the old seal or consult your equipment service manual.

❓ Frequently Asked Questions

How do I choose the right oil seal size?

Measure the shaft diameter (inner diameter), the bore diameter of the housing (outer diameter), and the housing depth (width/height). All three dimensions must match the seal you order. For example, a 20 × 30 × 7mm seal fits a 20mm (≈0.787″) shaft, a 30mm (≈1.181″) housing bore, and a 7mm (≈0.276″) housing depth. When in doubt, measure twice and consult your equipment manual.

What does "TC" mean on an oil seal?

TC stands for double-lip (twin contact) design. The primary lip retains oil or grease, while the secondary dust lip generally prevents contaminants from entering the bearing or gearbox. This dual-lip arrangement is the most common configuration for rotary shaft seals in automotive and industrial applications.

What is the load or pressure rating of these seals?

NBR TC oil seals are typically rated for low-to-moderate pressure applications — generally up to about 0.3 bar (4.4 psi) of dynamic pressure. They are designed for rotary shaft applications, not static high-pressure sealing. For higher-pressure environments, a different seal type (such as a lip seal with a garter spring backup) may be required.

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

NBR (nitrile rubber) generally offers good resistance to water, oil, and mild weather exposure. However, NBR is not recommended for prolonged UV exposure or ozone-rich environments. For outdoor equipment that sees extended sun exposure, a Viton (FKM) seal is typically a better choice. For occasional outdoor or wet use — such as garden equipment, trailers, or boat trailers — NBR seals are generally suitable.

What shaft or housing standards are these seals compatible with?

These seals follow the R23 / DIN 3760 standard for radial shaft seals. They are compatible with metric shafts and housings machined to standard tolerances. The 20mm inner diameter fits any 20mm metric shaft. Always verify the housing bore and depth match the OD and width of the seal you select.

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

Clean the housing bore and shaft. Lightly lubricate the seal lips with the fluid being sealed (oil or grease). Press the seal in squarely using a seal driver or a flat block — never hammer directly on the seal face. The seal should sit flush or slightly below the housing face. Avoid nicking the primary lip on keyways or splines during installation.

What temperature range can NBR oil seals handle?

NBR (nitrile rubber) seals typically operate reliably in a temperature range of approximately -40°F to +250°F (-40°C to +120°C). Sustained exposure above this range can cause the rubber to harden and crack, leading to leaks. For high-temperature applications such as engine exhaust-adjacent sealing, a Viton or silicone seal is generally recommended.

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

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