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home > TC Skeleton Oil Seals ID 205-255mm FKM Dual Lip Rotary Shaft Seal > TC Skeleton Oil Seals ID 205-255mm FKM Dual Lip Rotary Shaft Seal

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TC Skeleton Oil Seals ID 205-255mm FKM Dual Lip Rotary Shaft SealTC Skeleton Oil Seals ID 205255mm Stop Leaks on Large Rotary Shafts Gearbox oil weeping past the shaft seal, grease escaping from a slow turning conveyor bearing, or hydraulic fluid staining the floor beneath a pump these are the kinds of failures that shut down production lines and rack up cleanup costs. Maintenance engineers and industrial DIYers working on large bore rotating equipment need TC oil seals that fit precisely and hold up under heat,

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TC Skeleton Oil Seals ID 205–255mm — Stop Leaks on Large Rotary Shafts

Gearbox oil weeping past the shaft seal, grease escaping from a slow-turning conveyor bearing, or hydraulic fluid staining the floor beneath a pump — these are the kinds of failures that shut down production lines and rack up cleanup costs. Maintenance engineers and industrial DIYers working on large-bore rotating equipment need TC oil seals that fit precisely and hold up under heat, vibration, and chemical exposure. These TC skeleton oil seals are built for exactly that job.

Each seal is a single-piece TC-type radial shaft seal with a carbon-steel skeleton (spring-loaded) and an FKM (Viton) dual-lip design. Available in a wide range of metric sizes with inner diameters from 205mm (≈8.07") to 255mm (≈10.04"), outer diameters from 230mm (≈9.06") to 300mm (≈11.81"), and thicknesses from 10mm (≈0.39") to 20mm (≈0.79"). Select the exact ID × OD × Thickness combination from the variant dropdown to match your housing bore and shaft.

Typical applications include industrial gearbox output shaft sealing, large electric motor bearing housings, agricultural equipment final drives, and heavy-duty pump shaft assemblies — anywhere a metric large-bore rotary shaft seal is required to retain lubricant and exclude contaminants.

🔵 Compatibility Note: These are metric TC-type seals conforming to ISO 6194 / DIN 3760 dimensional standards. Verify your shaft ID, housing bore OD, and housing depth (thickness) before ordering. Sizes are listed as ID × OD × Thickness in millimeters.

✅ Key Features of These TC Skeleton Oil Seals

🛡️FKM Dual-Lip Design — The primary lip retains lubricant; the secondary lip excludes dust, dirt, and moisture — a critical advantage for large-bore rotary shaft seals in dirty or wet environments.
🌡️Wide Temperature Tolerance — FKM (Viton) lip material handles approximately -20°C to +200°C (-4°F to +392°F), covering most gearbox, pump, and motor operating ranges without lip hardening or cracking.
⚙️Carbon-Steel Skeleton Construction — The rigid metal case maintains roundness under press-fit installation and resists distortion in high-temperature housings, ensuring consistent radial sealing force over time.
📐Broad Size Range — With 63 size variants spanning ID 205–255mm and OD 230–300mm, this listing covers a wide range of industrial shaft seal replacements without sourcing from multiple suppliers.
🧪Chemical Resistance — FKM lip material is compatible with mineral oils, synthetic gear oils (PAO, ester-based), and many hydraulic fluids — reducing the risk of lip swelling or degradation in lubricated machinery.
🔩Spring-Energized Lip — An internal garter spring maintains consistent radial lip pressure against the shaft surface, compensating for minor shaft runout and extending effective seal life in rotating equipment.

📐 Technical Specifications — TC Skeleton Rotary Shaft Oil Seals

Seal Type	TC (Double Lip, Spring-Loaded Radial Shaft Seal)
Lip Material	FKM (Fluoroelastomer / Viton)
Case / Skeleton Material	Carbon Steel
Inner Diameter (ID) Range	205mm – 255mm (≈8.07" – 10.04")
Outer Diameter (OD) Range	230mm – 300mm (≈9.06" – 11.81")
Thickness Range	10mm – 20mm (≈0.39" – 0.79")
Operating Temperature	Typically -20°C to +200°C (-4°F to +392°F)
Max Dynamic Pressure	Typically ≤ 0.05 MPa (≈7 psi) — contact us to confirm
Dimensional Standard	ISO 6194 / DIN 3760 (metric)
Fluid Compatibility	Mineral oil, synthetic gear oil (PAO/ester), hydraulic fluid — see variant options
Packing	1 piece per order (select size above)
Finish	See variant options

⚠️ Sizing Tip: Always measure your existing seal or housing bore directly. Do not rely solely on equipment model numbers — OEM dimensions can vary by production year. 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 the shaft inner diameter (ID), the bore outer diameter (OD), and the housing depth (thickness). Match all three dimensions to the variant listed as ID×OD×Thickness. For example, 220*250*15mm means ID 220mm (≈8.66"), OD 250mm (≈9.84"), thickness 15mm (≈0.59"). When in doubt, go by the ID first, then confirm OD fits your housing bore.

What load or pressure can these oil seals handle?

TC skeleton oil seals are generally designed for low-to-moderate pressure applications — typically up to 0.05 MPa (≈7 psi) of dynamic pressure. They are not intended for high-pressure hydraulic circuits. For exact pressure ratings, contact us to confirm.

Are these seals suitable for outdoor or wet environments?

FKM (Viton) lip material offers good resistance to water, humidity, and many chemicals, making these seals generally suitable for outdoor and wet environments. The dual-lip design adds a secondary dust/moisture exclusion barrier. For continuous submersion or aggressive chemical exposure, contact us to confirm compatibility.

What shaft standards are compatible with these seals?

These are metric TC-type radial shaft seals compatible with metric shafts and housings following ISO 6194 / DIN 3760 dimensional standards. The ID dimension must match your shaft diameter precisely for an effective seal. They are not designed for inch-standard (imperial) shaft sizes without verification.

What temperature range can FKM oil seals withstand?

FKM (Viton) lip seals typically operate in a range of approximately -20°C to +200°C (-4°F to +392°F), making them suitable for most industrial gearboxes, pumps, and motor applications. Actual limits depend on the specific fluid and operating conditions.

Can I use these seals with synthetic or mineral gear oils?

FKM lip material is generally compatible with mineral oils, synthetic gear oils (PAO, ester-based), hydraulic fluids, and many fuels. It is not recommended for use with ketones, concentrated esters, or certain brake fluids. When in doubt, contact us to confirm fluid compatibility before installation.

How do I install a TC skeleton oil seal correctly?

Clean the housing bore and shaft. Lightly lubricate the seal lip with the fluid being sealed. Press the seal squarely into the bore using a seal driver or flat press — never hammer directly on the seal face. Ensure the seal sits flush or slightly below the housing face. 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 205-255mm FKM Dual Lip Rotary Shaft Seal

Name: TC Skeleton Oil Seals ID 205-255mm FKM Dual Lip Rotary Shaft Seal
Brand: www.midwoodautocraft.com
SKU: 99193330860
Price: 25.95 USD
Availability: InStock
Rating: 4.1431 (1607 reviews)