TC Oil Seal Rings Metric Size | Rotary Shaft Seal NBR 70 | ID 42–95mm

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TC Oil Seal Rings Metric Size | Rotary Shaft Seal NBR 70 | ID 42–95mm

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Size(ID x OD x Height): 42*55*7mm

Amout(pcs): 1 Pcs

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$6.09 USD

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TC Double-Lip NBR Oil Seal Rings — Metric Rotary Shaft Seals That Stop Leaks at the Source

Mechanics, equipment owners, and maintenance technicians know the frustration of a weeping gearbox or a leaking pump shaft — a small seal failure that turns into a costly oil-change, a contaminated bearing, or an unplanned downtime event. These TC FB skeleton oil seal rings are engineered for exactly those situations: a reliable, metric-dimensioned rotary shaft seal that installs cleanly and holds a positive seal under continuous rotation.

Each seal is a TC (double-lip) design with a carbon-steel skeleton frame and an NBR 70 (Nitrile Butadiene Rubber, Shore A 70) elastomer body. The primary lip seals lubricant in; the secondary dust lip keeps contaminants out. Available in a wide range of metric sizes with inner diameters from 42mm (≈1.65″) to 95mm (≈3.74″), outer diameters from 55mm to 130mm, and heights of 7mm, 8mm, 10mm, or 12mm — sold individually or in 5-piece packs.

Common applications include automotive rear axle and differential seals, agricultural tractor PTO and gearbox seals, hydraulic pump and motor shaft seals, industrial conveyor and gearbox output seals, and small-engine crankshaft seals — anywhere a metric rotary shaft seal is needed to retain oil and exclude dirt.

ℹ️ Compatibility Note: These are metric TC-type oil seals. Before ordering, measure your shaft (ID), bore (OD), and housing depth (Height) with calipers and match to the variant listed as ID × OD × Height (mm). If your equipment uses inch dimensions, convert to mm — contact us to confirm fit.

✅ Key Features of These TC NBR Rotary Shaft Oil Seals

🔩TC Double-Lip Design — The primary sealing lip retains lubricant under rotation; the secondary dust lip blocks dirt, debris, and moisture ingress, extending bearing and gear life in demanding environments.
🧱Carbon-Steel Skeleton Frame — An internal metal skeleton maintains the seal's round shape during press-fit installation and prevents distortion under housing bore pressure, ensuring consistent contact force on the shaft.
🛢️NBR 70 Elastomer Body — Nitrile rubber at Shore A 70 hardness is broadly compatible with petroleum oils, gear oils, hydraulic fluids, and greases — the standard choice for metric rotary shaft seal applications in gearboxes and pumps.
📐Wide Metric Size Range — ID 42–95mm, OD 55–130mm, heights 7–12mm across 119 distinct size combinations, covering a broad spectrum of agricultural, automotive, and industrial shaft seal replacements.
⚙️Press-Fit Outer Diameter — The steel-reinforced outer shell provides a firm interference fit in the housing bore, eliminating the need for sealant in most standard applications and simplifying field replacement.
📦Single or 5-Pack Quantity Options — Order one seal for a single repair or choose the 5-piece pack for workshop stock, fleet maintenance schedules, or equipment with multiple shaft seals replaced at the same service interval.

📐 Technical Specifications — TC Metric Rotary Shaft Oil Seals

Seal Type	TC (Double-Lip, FB Skeleton)
Material	NBR (Nitrile Butadiene Rubber), Shore A 70
Frame / Skeleton	Carbon steel (FB — fully bonded)
Inner Diameter (ID) Range	42mm (≈1.65″) – 95mm (≈3.74″)
Outer Diameter (OD) Range	55mm (≈2.17″) – 130mm (≈5.12″)
Height / Width Range	7mm (≈0.28″) – 12mm (≈0.47″)
Temperature Range	Typically –40 °C to +100 °C (–40 °F to +212 °F); intermittent peaks to ~120 °C
Compatible Fluids	Petroleum oils, gear oils, hydraulic fluids, greases (not for brake fluid or ketones)
Shaft Surface Speed	Typically up to 4–8 m/s (see FAQ for shaft finish requirements)
Dimension Standard	Metric (mm); see variant selector for exact ID × OD × Height
Quantity per Order	1 Pcs or 5 Pcs (select via variant)
Installation Method	Press-fit into housing bore; no sealant required in standard bores
Country of Origin	See variant options

⚠️ Sizing Tip: Always measure with calipers — do not rely on worn seal dimensions alone, as seals can deform over time. The variant format is ID × OD × Height in millimeters. Contact us to confirm if your application has non-standard tolerances.

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure the shaft (inner diameter), the bore (outer diameter), and the housing depth (height) with calipers. Match those three dimensions to the variant listed as ID × OD × Height. For example, a 50×70×10mm seal fits a 50mm shaft in a 70mm bore with a 10mm (≈3/8″) housing depth. When in doubt, go by the shaft diameter first — it is the most critical fit.

What does NBR 70 mean, and what fluids is it compatible with?

NBR stands for Nitrile Butadiene Rubber; 70 refers to Shore A hardness. NBR 70 is generally compatible with petroleum-based oils, hydraulic fluids, gear oils, and greases. It is typically rated for continuous use up to about 100 °C (212 °F) and intermittent peaks up to 120 °C (248 °F). It is not recommended for use with brake fluid, ketones, or strong acids.

What is the maximum shaft speed these rotary shaft seals can handle?

TC-type rotary shaft seals in NBR 70 are generally rated for shaft surface speeds up to approximately 4–8 m/s, depending on shaft finish and lubrication. For higher-speed applications, ensure the shaft surface roughness is Ra 0.2–0.8 µm and that the seal lip is pre-lubricated with the operating fluid before assembly.

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

The TC (double-lip) design includes a secondary dust lip that provides basic protection against water splash and contaminants, making it suitable for outdoor equipment such as lawn tractors, tillers, and agricultural machinery. However, NBR is not inherently UV-resistant for prolonged direct sunlight exposure. For fully submerged or high-pressure water environments, a dedicated water-seal or FKM material is generally recommended.

Are these seals compatible with metric shafts only, or do they fit inch shafts too?

All dimensions listed are metric (mm). Many metric sizes correspond closely to common inch shaft diameters — for example, a 50mm ID seal fits a 50mm (≈1.969″) shaft. If your equipment uses inch shafts, convert the shaft diameter to mm and select the nearest matching ID. Contact us to confirm fit if you are unsure.

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

Clean the bore and shaft thoroughly. Lightly coat the seal lip and outer diameter with the operating fluid or assembly grease. Use a seal driver or a flat press plate to push the seal in squarely — never hammer directly on the seal face. Press until the seal face is flush with or just below the housing surface. Avoid dragging the seal lip over keyways or splines; use a protective sleeve if needed.

What is the difference between the 1 Pcs and 5 Pcs options?

Both options are the identical seal — the only difference is quantity. The 5 Pcs pack offers a lower per-unit cost and is ideal for fleet maintenance, workshop stock, or applications where seals are replaced on a regular service interval.

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

TC Oil Seal Rings Metric Size | Rotary Shaft Seal NBR 70 | ID 42–95mm

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TC Double-Lip NBR Oil Seal Rings — Metric Rotary Shaft Seals That Stop Leaks at the Source

✅ Key Features of These TC NBR Rotary Shaft Oil Seals

📐 Technical Specifications — TC Metric Rotary Shaft Oil Seals

❓ Frequently Asked Questions

TC Oil Seal Rings Metric Size | Rotary Shaft Seal NBR 70 | ID 42–95mm

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