What is the maximum operating temperature for these seals?

NBR 70 seals typically handle continuous temperatures from -40°F to +212°F (-40°C to +100°C). Short-term peaks up to +230°F (+110°C) are generally tolerable. For higher-temperature applications, consider FKM (Viton) seals instead.

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

The TC (double-lip) design includes a secondary dust/water exclusion lip, making it more suitable for outdoor and wet environments than single-lip seals. The steel case provides structural rigidity. However, prolonged submersion or exposure to salt water may accelerate wear — inspect periodically in harsh conditions.

What shaft speed can these seals handle?

TC skeleton oil seals are generally rated for shaft surface speeds up to approximately 4–8 m/s (800–1600 ft/min) depending on shaft finish and lubrication. Confirm the specific speed rating for your application if operating at high RPM.

How do I install a TC skeleton oil seal correctly?

Clean the housing bore and lightly lubricate the seal lip with the fluid being sealed. Press the seal in squarely using a seal driver or a flat block — never hammer directly on the seal face. The open (spring) side faces inward toward the fluid. Ensure the shaft surface is smooth (typically Ra 0.2–0.8 µm) to prevent premature lip wear.

TC Skeleton Oil Seals ID 50 52 53 54mm | NBR 70 Dual Lip Rotary Shaft Seal

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TC Skeleton Oil Seals ID 50 52 53 54mm | NBR 70 Dual Lip Rotary Shaft Seal

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Sizes (ID x OD x Thickness): 50*58*4mm

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TC Skeleton Oil Seals ID 50–54mm — Stop Shaft Leaks Before They Become Costly Repairs

A weeping gearbox, a dripping pump shaft, or an axle seal that lets grease escape — these are the kinds of failures that sideline equipment and rack up repair bills. Mechanics, equipment owners, and DIY rebuilders who work on gearboxes, hydraulic pumps, agricultural machinery, and industrial drives need a reliable source for exact-fit TC skeleton oil seals without ordering a full kit of sizes they'll never use.

Each listing covers a single piece (1 PCS) of a TC-type skeleton oil seal with an inner diameter (ID) of 50mm (≈1.969"), 52mm (≈2.047"), 53mm (≈2.087"), or 54mm (≈2.126"). Outer diameters range from 58mm to 120mm and thicknesses from 4mm to 14mm across 200+ available size combinations. The sealing element is NBR (Nitrile Butadiene Rubber) at Shore A 70 hardness, bonded to a stamped steel skeleton case. A coil garter spring loads the primary lip against the shaft for consistent contact pressure.

These TC dual-lip rotary shaft seals are well-suited for gearbox output shaft rebuilds, hydraulic cylinder rod sealing, agricultural PTO shaft repairs, and industrial motor bearing housings where a secondary exclusion lip is needed to keep contaminants out alongside the primary oil-retention lip.

🔵 Compatibility Note: Verify your shaft ID, housing bore OD, and housing depth before ordering. Dimensions are listed in mm as ID × OD × Thickness. These seals follow metric TC / DIN 3760 sizing conventions.

✅ Key Features of These TC Skeleton Oil Seals

🔩 Dual-Lip TC Design — The primary spring-loaded lip retains oil while the secondary lip excludes dust, dirt, and moisture, making these seals suitable for rotary shaft applications in contaminated environments.
🧲 Garter Spring Loaded — An internal coil spring maintains consistent radial lip pressure against the shaft surface, compensating for minor shaft runout and lip wear over time.
🛡️ NBR 70 Compound — Nitrile rubber at Shore A 70 hardness is generally compatible with petroleum-based oils, gear lubricants, and hydraulic fluids across a typical operating range of -40°F to +212°F (-40°C to +100°C).
⚙️ Stamped Steel Skeleton Case — The rigid metal outer case provides a press-fit into the housing bore, resisting blowout under pressure and maintaining concentricity with the shaft.
📐 200+ Size Combinations — With ID options of 50, 52, 53, and 54mm and OD/thickness combinations spanning 58mm to 120mm OD, you can match the exact replacement seal for gearboxes, pumps, and axle housings without buying a multi-pack.
🚚 Ships from US Warehouse — In-stock inventory ships domestically, reducing lead times compared to overseas-only suppliers for maintenance and repair applications.

📐 Technical Specifications — TC Skeleton Rotary Shaft Oil Seals

Seal Type	TC (Double Lip with Garter Spring)
Inner Diameter (ID)	50mm (≈1.969"), 52mm (≈2.047"), 53mm (≈2.087"), 54mm (≈2.126")
Outer Diameter (OD)	58mm – 120mm (see variant options)
Thickness	4mm – 14mm (see variant options)
Lip Material	NBR (Nitrile Butadiene Rubber), Shore A 70
Case Material	Stamped Carbon Steel
Spring Type	Coil Garter Spring
Temperature Range	-40°F to +212°F (-40°C to +100°C) continuous; typically up to +230°F (+110°C) short-term
Fluid Compatibility	Petroleum-based oils, gear oils, hydraulic fluids (not for brake fluid, ketones, or strong acids)
Shaft Speed	Typically up to 4–8 m/s surface speed (confirm for high-RPM applications)
Standard Reference	Metric TC / DIN 3760
Quantity per Order	1 PCS
Shaft Surface Finish	Recommended Ra 0.2–0.8 µm for optimal lip life

⚠️ Before You Order: Measure your existing seal or housing bore with calipers. The variant format is ID × OD × Thickness (all in mm). If your measurement falls between listed sizes, contact us to confirm the closest fit.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure three dimensions with calipers: the shaft diameter (= ID), the housing bore diameter (= OD), and the housing depth (= Thickness). The variant label format is ID × OD × Thickness in mm. For example, 50×70×10mm means a 50mm shaft, 70mm bore, 10mm thick (≈1.97" × 2.76" × 0.39"). Always measure your existing seal or housing before ordering — do not rely on part numbers alone, as cross-references can vary by manufacturer.

What material is the seal lip, and what fluids is it compatible with?

The sealing lip is NBR (Nitrile Butadiene Rubber) at Shore A 70 hardness. NBR is generally compatible with petroleum-based engine oils, gear oils, ATF, and hydraulic fluids. It is not recommended for use with brake fluid (DOT 3/4/5), ketones, esters, or concentrated acids. If your application uses synthetic ester-based fluids, consider FKM (Viton) seals instead.

What is the operating temperature range?

NBR 70 seals typically handle continuous temperatures from -40°F to +212°F (-40°C to +100°C). Short-term peaks up to approximately +230°F (+110°C) are generally tolerable. For sustained high-temperature environments (e.g., near exhaust or in high-load gearboxes), FKM compound seals are typically the better choice.

Can these seals be used outdoors or in wet, muddy conditions?

Yes — the TC (double-lip) design includes a secondary exclusion lip specifically to block dust, water, and light contaminants from reaching the primary sealing lip. This makes TC seals more suitable for outdoor equipment, agricultural machinery, and construction equipment than single-lip (SC) seals. For prolonged submersion or salt-water exposure, inspect the seal periodically for accelerated wear.

What shaft surface speed can these seals handle?

TC skeleton oil seals are generally rated for shaft surface speeds up to approximately 4–8 m/s (roughly 800–1,600 ft/min), depending on shaft finish quality, lubrication, and operating temperature. For high-RPM applications, confirm the surface speed at your shaft diameter and consult the seal manufacturer's datasheet if available.

Are these metric seals compatible with imperial-dimensioned housings?

All dimensions are listed in metric (mm) following DIN 3760 / TC standard conventions. If your housing uses imperial dimensions, convert carefully — for example, 50mm ID ≈ 1.969", 52mm ≈ 2.047", 54mm ≈ 2.126". In most cases, metric seals can replace imperial-sized seals if the converted dimensions match closely. Contact us to confirm fit if you are unsure.

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

Clean the housing bore and lightly lubricate the seal lip with the fluid being sealed (or clean assembly grease). Press the seal in squarely using a seal driver or a flat wooden block — never strike the seal face directly with a hammer. The open side (where the spring is visible) faces inward toward the fluid source. Ensure the shaft surface is smooth (typically Ra 0.2–0.8 µm) to prevent premature lip wear. Avoid nicking the lip on keyways or splines during installation.

🛒 Select your size (ID × OD × Thickness) above, then add to cart — ships from our US warehouse.

TC Skeleton Oil Seals ID 50 52 53 54mm | NBR 70 Dual Lip Rotary Shaft Seal

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Beschreibung

TC Skeleton Oil Seals ID 50–54mm — Stop Shaft Leaks Before They Become Costly Repairs

✅ Key Features of These TC Skeleton Oil Seals

📐 Technical Specifications — TC Skeleton Rotary Shaft Oil Seals

❓ Frequently Asked Questions

TC Skeleton Oil Seals ID 50 52 53 54mm | NBR 70 Dual Lip Rotary Shaft Seal

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