What does FKM mean and why does it matter?

FKM (Fluoroelastomer, also known as Viton) is a synthetic rubber compound that offers superior resistance to heat, oils, fuels, and chemicals compared to standard NBR rubber. It is generally rated for continuous service up to approximately 200°C (392°F), making it suitable for demanding industrial and hydraulic environments.

What load or pressure can these TC oil seals handle?

TC-type skeleton oil seals are designed for dynamic rotary shaft applications and are typically rated for low-to-moderate pressure environments (generally up to 0.05 MPa / 7 psi of differential pressure). They are not intended for high-pressure hydraulic lines. Contact us to confirm suitability for your specific operating conditions.

What shaft surface finish and speed are compatible with these seals?

For reliable sealing, the shaft surface in contact with the seal lip should typically have a finish of Ra 0.2–0.8 µm (8–32 µin). Shaft hardness of HRC 30 or above is generally recommended to minimize lip wear. Maximum shaft speed compatibility depends on seal diameter and lubricant type — contact us to confirm for your specific setup.

Are these TC oil seals compatible with standard metric housing bores?

Yes. All dimensions follow standard metric sizing (mm). The OD is designed for a press-fit into a standard metric housing bore. Verify the bore diameter and groove depth match the OD and thickness of your selected variant before installation.

Which industries or machines commonly use these large-bore TC oil seals?

Seals in the 260–300mm ID range are commonly used in agricultural equipment (tractors, combines, harvesters), industrial gearboxes, heavy construction machinery, wind turbine gearboxes, and large hydraulic pump shafts. If you are unsure whether this seal fits your machine, share your equipment model and we can help confirm compatibility.

TC Oil Seal 260-300mm ID FKM Dual Lip Rotary Shaft Skeleton Seal

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TC Oil Seal 260-300mm ID FKM Dual Lip Rotary Shaft Skeleton Seal

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Sizes (ID x OD x Thickness): 260*290*15mm

Packing QTY (Piece): 1 PCS

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TC Oil Seal 260–300mm ID — FKM Dual Lip Rotary Shaft Sealing for Demanding Applications

When a worn or undersized shaft seal causes lubricant leaks, contamination ingress, or premature bearing failure, the cost goes far beyond the seal itself. Maintenance engineers, equipment rebuilders, and agricultural machinery technicians working with large-bore rotating shafts need a seal that holds up to heat, chemical exposure, and continuous rotation — not one that fails after a single season.

Each listing covers one TC skeleton oil seal (1 PCS per order). These seals feature a carbon steel skeleton reinforcement, an FKM (Fluoroelastomer/Viton) sealing element, and a dual-lip TC profile. Available sizes span ID × OD × Thickness from 260×290×15mm (≈10.2"×11.4"×0.59") up to 300×360×25mm (≈11.8"×14.2"×0.98"), covering 35 distinct size variants to match a wide range of housing and shaft combinations.

These TC oil seals are well suited for agricultural tractor axle sealing, industrial gearbox output shaft sealing, heavy equipment wheel hub seals, and large hydraulic pump shaft applications where FKM chemical resistance and dual-lip contamination exclusion are required.

🔵 Compatibility: Fits standard metric housing bores. Match your shaft OD to the seal ID, housing bore to the seal OD, and groove depth to the seal thickness. See variant options for all available size combinations.

✅ Key Features of These TC Skeleton Oil Seals

🔩TC Dual-Lip Design — The primary lip retains lubricant while the secondary dust lip actively excludes dirt, water, and debris, extending bearing and lubricant service life in contaminated environments.
🌡️FKM Fluoroelastomer Compound — Resists petroleum oils, synthetic lubricants, hydraulic fluids, and elevated temperatures typically up to 200°C (392°F), outperforming standard NBR seals in chemically aggressive or high-heat applications.
🏗️Carbon Steel Skeleton Reinforcement — The rigid internal skeleton maintains the seal's circular geometry under press-fit installation and prevents distortion during operation, ensuring consistent lip contact around the full shaft circumference.
📐35 Size Variants — ID 260 to 300mm — Covers a broad range of large-bore rotary shaft seal applications with ID increments as fine as 5mm and thickness options from 15mm to 25mm, reducing the need for custom machining or housing modification.
⚙️Press-Fit OD for Secure Housing Retention — The outer diameter is sized for an interference fit into standard metric bores, eliminating rotation of the seal body and preventing bypass leakage at the housing interface.
🚜Suited for Agricultural and Industrial Rebuilds — The 260–300mm ID range targets large-bore applications common in tractor final drives, combine harvester axles, industrial gearbox output shafts, and heavy construction equipment wheel ends.

📐 Technical Specifications — TC Skeleton Oil Seal

Seal Type	TC (Double Lip with Dust Lip)
Inner Diameter (ID) Range	260mm – 300mm (≈10.2" – 11.8")
Outer Diameter (OD) Range	290mm – 360mm (≈11.4" – 14.2")
Thickness Range	15mm – 25mm (≈0.59" – 0.98")
Available Size Variants	35 variants — see variant options
Sealing Material	FKM (Fluoroelastomer / Viton)
Skeleton / Reinforcement	Carbon Steel
Lip Configuration	Dual lip — primary sealing lip + secondary dust exclusion lip
Temperature Range	Typically –20°C to +200°C (–4°F to +392°F)
Compatible Fluids	Petroleum oils, synthetic lubricants, hydraulic fluids, greases
Shaft Surface Finish (Recommended)	Ra 0.2–0.8 µm (8–32 µin)
Shaft Hardness (Recommended)	HRC 30 or above
Operating Pressure	Low-to-moderate; typically ≤0.05 MPa (≤7 psi) — contact us to confirm
Quantity per Order	1 PCS
Dimension Standard	Metric (mm)

⚠️ Before ordering: Verify all three dimensions — ID (shaft OD), OD (housing bore), and Thickness (groove depth) — against your equipment's specifications. If you are unsure, contact us with your machine model or a photo of the existing seal.

❓ Frequently Asked Questions

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

Measure three dimensions on your existing seal or housing: (1) the shaft outer diameter — this matches the seal's ID; (2) the housing bore diameter — this matches the seal's OD; (3) the housing groove depth — this matches the seal's thickness. For example, a 270mm shaft running in a 310mm bore with an 18mm groove requires a 270×310×18mm seal (≈10.6"×12.2"×0.71"). Always confirm all three values before selecting a variant.

What does FKM mean and why is it better than standard rubber seals?

FKM stands for Fluoroelastomer (commercially known as Viton). Compared to standard NBR (nitrile) rubber seals, FKM generally offers: higher continuous temperature resistance (typically up to 200°C / 392°F vs. ~120°C for NBR), better resistance to petroleum-based and synthetic oils, hydraulic fluids, and chemical exposure. For high-heat or chemically aggressive environments, FKM is typically the more durable choice.

What pressure or load can these TC oil seals handle?

TC-type skeleton oil seals are designed for dynamic rotary shaft sealing under low-to-moderate differential pressure — typically up to approximately 0.05 MPa (7 psi). They are not intended for high-pressure hydraulic line sealing. If your application involves significant pressure differentials, contact us to confirm suitability before ordering.

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

In most cases, yes. The TC dual-lip design includes a secondary dust/exclusion lip specifically to block water, mud, and particulate contamination from reaching the primary sealing lip and the bearing. The FKM compound also provides good resistance to moisture and weathering. These characteristics make TC FKM seals a common choice for agricultural equipment, outdoor machinery, and similar environments.

What shaft surface finish and hardness do I need for reliable sealing?

For consistent lip contact and minimal wear, the shaft surface running against the seal lip should generally have a surface finish of Ra 0.2–0.8 µm (8–32 µin) and a hardness of HRC 30 or above. A shaft that is too rough will accelerate lip wear; one that is too smooth may not retain a lubricant film at the lip interface. If your shaft shows scoring or wear grooves, address those before installing a new seal.

Are these seals compatible with standard metric housing bores?

Yes. All dimensions are metric (mm) and follow standard TC oil seal sizing conventions. The OD is designed for a press-fit into a standard metric housing bore. Confirm that your housing bore diameter and groove depth match the OD and thickness of your selected variant. No special tooling is required beyond a seal driver or press of the appropriate diameter.

Which machines or industries commonly use seals in the 260–300mm ID range?

Seals in this size range are typically found in: agricultural equipment (tractor final drives, combine harvester axles, large PTO shafts), industrial gearboxes and reducers, heavy construction machinery (excavator swing drives, wheel loaders), wind turbine gearboxes, and large hydraulic pump or motor shafts. If you are rebuilding equipment and need help confirming the correct size, share your machine model or the markings on your existing seal.

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

TC Oil Seal 260-300mm ID FKM Dual Lip Rotary Shaft Skeleton Seal

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Beschreibung

TC Oil Seal 260–300mm ID — FKM Dual Lip Rotary Shaft Sealing for Demanding Applications

✅ Key Features of These TC Skeleton Oil Seals

📐 Technical Specifications — TC Skeleton Oil Seal

❓ Frequently Asked Questions

TC Oil Seal 260-300mm ID FKM Dual Lip Rotary Shaft Skeleton Seal

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