What load or pressure can these seals handle?

TC-type skeleton oil seals are generally designed for low-to-medium pressure applications. They are typically rated for static pressures up to about 0.05 MPa (7 psi). For higher-pressure systems, a different seal type may be required — contact us to confirm suitability.

Are these seals suitable for outdoor or wet environments?

NBR 70 (nitrile rubber) offers good resistance to petroleum-based oils, greases, and water splash. It is generally suitable for outdoor use in moderate climates. However, NBR is not recommended for prolonged exposure to ozone, UV, or ketone-based fluids. For harsh outdoor or chemical environments, a Viton (FKM) seal would typically be a better choice.

How do I install a TC skeleton oil seal correctly?

Clean the bore and shaft. 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 metal case should sit flush with or just below the housing face. Avoid cocking the seal during installation.

Can I buy just one seal, or do I need to buy a pack?

Both options are available. Select '1 Pcs' for a single replacement seal, or '5 Pcs' for a value pack — useful for fleet maintenance, workshop stock, or when you anticipate future replacements of the same size.

TC FB Skeleton Oil Seal — Metric Rotary Shaft Seal NBR 70, ID 25–32mm

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TC FB Skeleton Oil Seal — Metric Rotary Shaft Seal NBR 70, ID 25–32mm

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Size(ID x OD x Height): 25*35*7mm

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TC FB Skeleton Oil Seal — Stop Leaks on Metric Rotary Shafts, ID 25–32mm

Leaking shaft seals are one of the most common causes of gearbox oil loss, bearing contamination, and unplanned downtime. Whether you're rebuilding a gearbox, replacing a worn seal on agricultural equipment, or servicing an industrial motor, finding an exact-fit metric TC oil seal quickly is critical. These TC FB skeleton oil seals are stocked in a wide range of metric sizes specifically to cover the most common shaft diameters from 25mm to 32mm.

Each seal is a single-lip TC-type (double-lip with dust lip) skeleton design, molded in NBR 70 (nitrile rubber) over a steel case. Sizes are expressed as ID × OD × Height in millimeters — for example, 30×50×10mm means a 30mm (≈1.18") shaft, 50mm (≈1.97") bore, and 10mm (≈0.39") housing depth. Available in 1 Pcs (single replacement) or 5 Pcs (value pack). Inner diameters range from 25mm (≈0.98") to 32mm (≈1.26"); outer diameters from 35mm to 72mm; heights from 5mm to 12mm across the full variant range.

Typical applications include gearbox output shaft seals, electric motor end-cap seals, pump shaft seals, agricultural PTO shaft seals, and light industrial rotary equipment. The NBR 70 compound makes these seals a practical choice for petroleum oil, gear oil, and grease retention in metric rotary shaft seal replacement projects.

ℹ️ Compatibility Note: These are metric TC-type seals per ISO 6194 / DIN 3760. Always verify your shaft ID, bore OD, and housing depth before ordering. The variant label shows ID × OD × Height in mm.

⚠️ Size Confirmation: If you are unsure of your exact dimensions, measure the old seal with calipers or contact us before purchasing. A 1mm mismatch will cause leaks or installation failure.

✅ Key Features of These TC FB Skeleton Oil Seals

🔩 TC Double-Lip Design — The primary sealing lip retains oil while the secondary dust lip blocks contaminants, making these seals effective in dirty or wet environments typical of agricultural and industrial rotary shaft applications.
🧲 Steel Skeleton Case — The rigid metal insert maintains dimensional stability during press-fit installation and prevents the seal from distorting under housing bore pressure, ensuring a consistent interference fit.
🌡️ NBR 70 Compound — Nitrile rubber rated at 70 Shore A hardness handles petroleum oils, gear lubricants, and greases across a typical service range of −40°F to +250°F (−40°C to +120°C), covering most gearbox and motor seal replacement scenarios.
📐 Wide Metric Size Range — With inner diameters from 25mm to 32mm and outer diameters up to 72mm, this listing covers dozens of common metric rotary shaft seal sizes in a single place, reducing the need to source from multiple suppliers.
📦 Single or 5-Pack Quantity Options — Order one seal for an immediate repair or a 5-piece pack for workshop stock and fleet maintenance — both options ship from our US warehouse for faster delivery.
🔄 Direct-Replacement Fit — Dimensioned to match OEM metric seal specifications, these TC skeleton seals are designed as drop-in replacements for worn or damaged seals in gearboxes, pumps, and motors without modification.

📐 Technical Specifications — TC FB Skeleton Oil Seal

Seal Type	TC (Double Lip — Primary Oil Lip + Dust Lip)
Design	FB Skeleton (metal case with rubber-bonded lip)
Material	NBR 70 (Nitrile Butadiene Rubber, 70 Shore A)
Case Construction	Steel skeleton, rubber-coated OD
Inner Diameter (ID) Range	25mm (≈0.98") – 32mm (≈1.26")
Outer Diameter (OD) Range	35mm (≈1.38") – 72mm (≈2.83")
Height Range	5mm (≈0.20") – 12mm (≈0.47")
Operating Temperature	−40°F to +250°F (−40°C to +120°C), typically
Compatible Fluids	Petroleum oils, gear oils, greases (not ketones or ozone-rich environments)
Pressure Rating	Low-to-medium; typically up to ≈0.05 MPa static — see variant options
Standard Reference	ISO 6194 / DIN 3760 (metric TC type)
Quantity Options	1 Pcs / 5 Pcs (select above)
Size Format	ID × OD × Height (mm) — select your exact size above
Country of Origin	See variant options

❓ Frequently Asked Questions

How do I choose the right TC oil seal size for my application?

Measure three dimensions: the shaft diameter (= Inner Diameter / ID), the bore diameter in the housing (= Outer Diameter / OD), and the housing depth (= Height). Match all three to the variant label shown as ID × OD × Height. For example, a 30×50×10mm seal fits a 30mm (≈1.18") shaft in a 50mm (≈1.97") bore with a 10mm (≈0.39") housing depth. When replacing an existing seal, measure the old seal with calipers — do not rely on visual estimation.

What pressure can these TC skeleton oil seals handle?

TC-type skeleton oil seals are generally designed for low-to-medium pressure applications, typically up to approximately 0.05 MPa (≈7 psi) static pressure. They are not intended for high-pressure hydraulic systems. If your application involves significant shaft pressure, contact us to confirm suitability or consider a different seal type.

Are NBR 70 oil seals suitable for outdoor or wet environments?

NBR 70 nitrile rubber generally performs well with petroleum-based oils, gear lubricants, greases, and water splash — making it suitable for most outdoor agricultural and light industrial applications. However, NBR is not recommended for prolonged ozone exposure, direct UV, or contact with ketone-based fluids. For harsh chemical or extreme outdoor environments, a Viton (FKM) compound is typically a better choice.

What shaft and bore standards are these seals compatible with?

These are metric TC-type oil seals dimensioned per ISO 6194 / DIN 3760 guidelines. They are not thread-specific — they seal around a rotating shaft by interference fit in the bore. As long as your shaft ID, bore OD, and housing depth match the selected variant, these seals will generally fit standard metric equipment including gearboxes, motors, and pumps from European and Asian manufacturers.

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

Clean the bore and shaft thoroughly. Lightly lubricate the seal lip with the fluid being sealed (oil or 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 metal case should sit flush with or just below the housing face. Cocking the seal during installation is the most common cause of premature failure.

What is the operating temperature range for these NBR oil seals?

NBR 70 compound typically operates reliably from approximately −40°F to +250°F (−40°C to +120°C). Continuous operation near the upper limit may accelerate lip wear over time. If your application regularly exceeds 250°F, a high-temperature FKM (Viton) seal would generally be more appropriate.

Should I buy 1 Pcs or the 5 Pcs pack?

The 1 Pcs option is ideal for a single repair or replacement. The 5 Pcs pack offers a lower per-unit cost and is practical for workshop stock, fleet maintenance programs, or when you anticipate replacing the same seal size on multiple machines. Both options ship from our US warehouse.

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

TC FB Skeleton Oil Seal — Metric Rotary Shaft Seal NBR 70, ID 25–32mm

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TC FB Skeleton Oil Seal — Stop Leaks on Metric Rotary Shafts, ID 25–32mm

✅ Key Features of These TC FB Skeleton Oil Seals

📐 Technical Specifications — TC FB Skeleton Oil Seal

❓ Frequently Asked Questions

TC FB Skeleton Oil Seal — Metric Rotary Shaft Seal NBR 70, ID 25–32mm

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