FKM TC Oil Seal Double Lip Spring Rotary Shaft Seal ID 36-40mm

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FKM TC Oil Seal Double Lip Spring Rotary Shaft Seal ID 36-40mm

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Size (ID x OD x Thickness): 36*54*7mm

Amount: 1 pcs

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$4.61 USD

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FKM TC Oil Seal — Double Lip Spring Rotary Shaft Seal for Reliable Leak Prevention

Leaking shaft seals are one of the most common causes of oil loss in engines, gearboxes, pumps, and agricultural equipment. Whether you're a mechanic replacing a worn rear main seal, a DIYer rebuilding a differential, or a maintenance tech servicing industrial machinery, finding the exact FKM TC oil seal in the right size — without waiting weeks for a special order — is the real challenge.

Each seal in this listing is a TC-type (Twin Contact) rotary shaft seal made from FKM (fluoroelastomer) compound, featuring a dual-lip design with a stainless steel garter spring behind the primary lip. Sizes span inner diameters of 36mm, 37mm, 38mm, and 40mm, with outer diameters ranging from 47mm up to 90mm and thicknesses from 4mm to 12mm — available individually (1 pcs) or in a 5-piece set. All dimensions follow the standard ID × OD × Thickness format (e.g., 40×60×7mm means a 40mm shaft, 60mm bore, 7mm deep housing).

These FKM double lip oil seals are commonly used in automotive rear axle and pinion seal replacement, small engine crankshaft sealing, hydraulic pump shaft sealing, and gearbox output shaft applications where resistance to heat and petroleum-based fluids is required.

🔵 Compatibility Note: These seals fit standard metric bores. Verify your shaft OD, housing bore ID, and housing depth with calipers before ordering. The variant name lists dimensions as ID × OD × Thickness in millimeters.

⚠️ Confirm Before Installing: FKM is generally compatible with petroleum oils, synthetic gear oils, and ATF. It is not recommended for ketones or certain brake fluids. Verify chemical compatibility with your specific fluid.

✅ Key Features of These FKM TC Double Lip Rotary Shaft Oil Seals

🛡️Dual-Lip TC Design — The outer dust lip blocks dirt and debris while the inner spring-loaded lip maintains constant radial pressure against the shaft, providing two-stage protection against both contamination ingress and oil leakage.
🌡️FKM Fluoroelastomer Compound — Withstands continuous operating temperatures typically from -20°C (-4°F) to 200°C (392°F), making these seals suitable for high-heat environments such as engine bays, turbo-adjacent housings, and industrial gearboxes.
🔩Stainless Steel Garter Spring — The integrated spring maintains consistent lip-to-shaft contact force even as the lip wears over time, extending service life compared to springless lip seals in rotary shaft applications.
⚗️Broad Fluid Compatibility — FKM compound resists petroleum-based motor oils, synthetic gear oils, ATF, diesel fuel, and many hydraulic fluids — a practical choice for automotive differential seals, pump shaft seals, and agricultural equipment.
📐Wide Size Selection — Inner diameters of 36, 37, 38, and 40mm with outer diameters from 47mm to 90mm and thicknesses from 4mm to 12mm cover a broad range of metric shaft and bore combinations in a single listing.
📦Single or 5-Piece Quantity Options — Order one seal for a targeted repair or choose the 5-piece set for maintenance kits, fleet service, or keeping a spare on the shelf — both options ship from our US warehouse.

📐 Technical Specifications — FKM TC Rotary Shaft Oil Seal

Seal Type	TC (Twin Contact / Double Lip)
Material	FKM (Fluoroelastomer / Viton®-type)
Spring	Stainless steel garter spring
Inner Diameter (ID)	36mm, 37mm, 38mm, 40mm — see variant options
Outer Diameter (OD)	47mm – 90mm — see variant options
Thickness	4mm – 12mm — see variant options
Dimension Format	ID × OD × Thickness (mm)
Operating Temperature	Typically -20°C to 200°C (-4°F to 392°F)
Fluid Compatibility	Petroleum oils, synthetic gear oil, ATF, diesel, many hydraulic fluids
Quantity per Order	1 pcs or 5 pcs — see variant options
Shaft Speed	Contact us to confirm for your application
Max Static Pressure	Generally up to ~0.05 MPa (7 psi); not for high-pressure hydraulics
Country of Origin	See variant options

❓ Frequently Asked Questions

How do I choose the right TC oil seal size?

Measure the shaft diameter (ID), the bore diameter (OD), and the housing depth (thickness) with calipers. Match those three dimensions to the variant listed as ID×OD×Thickness. For example, a 40×60×7mm seal fits a 40mm shaft inside a 60mm bore with a 7mm housing depth. When converting, 1 inch ≈ 25.4mm — so a 40mm shaft is roughly 1‑9/16 inches.

What load or pressure can these oil seals handle?

TC-type rotary shaft seals are generally designed for low-to-moderate shaft speeds and static pressures up to approximately 0.05 MPa (7 psi). They are not intended for high-pressure hydraulic applications. For dynamic sealing under higher pressure, a dedicated hydraulic lip seal or U-cup should be used instead.

Are these FKM oil seals suitable for outdoor or high-temperature use?

Yes. FKM (Viton®-type) elastomer typically withstands continuous temperatures from about -20°C (-4°F) up to 200°C (392°F), making it well-suited for engine bays, gearboxes, and outdoor equipment exposed to heat, UV, and weathering. Always verify the specific operating temperature against your application requirements.

What fluids are these seals compatible with?

FKM seals are generally compatible with petroleum-based oils, synthetic gear oils, ATF, diesel fuel, and many hydraulic fluids. They also resist a wide range of chemicals including dilute acids and silicone oils. They are generally not recommended for use with ketones, esters, or certain brake fluids — confirm compatibility with your specific fluid before installation.

What does "TC" mean, and how is it different from "SC"?

TC stands for "Twin Contact" — the seal has two sealing lips: a primary oil-retention lip with a garter spring and a secondary dust-exclusion lip. SC (Single Contact) has only one lip. TC seals provide better contamination protection and are the standard choice for most automotive and industrial shaft applications.

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

Apply a thin film of clean oil or grease to the seal lip and the shaft before installation. Use a seal driver or a flat block of wood to press the seal in squarely — never hammer directly on the seal face. Press until the seal is flush with or just below the housing surface. Avoid dragging the lip over sharp keyways or threads; use a sleeve or tape to protect the lip during installation.

Can I buy multiple pieces at a discount?

Yes. Each size is available in a 1-piece or 5-piece quantity option. Selecting the 5-piece option provides a lower per-unit cost and is ideal for maintenance kits, fleet repairs, or keeping spares on hand.

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

FKM TC Oil Seal Double Lip Spring Rotary Shaft Seal ID 36-40mm

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Beschreibung

FKM TC Oil Seal — Double Lip Spring Rotary Shaft Seal for Reliable Leak Prevention

✅ Key Features of These FKM TC Double Lip Rotary Shaft Oil Seals

📐 Technical Specifications — FKM TC Rotary Shaft Oil Seal

❓ Frequently Asked Questions

FKM TC Oil Seal Double Lip Spring Rotary Shaft Seal ID 36-40mm

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