Sealing Excellence, Securing Industry

CFKS Reducer End Cover Oil Seal EC FKM Nitrile Rubber Oil Seal EC End Cup Cover for Transmission Gearbox

CFKS EC Oil Seal for reducer and gearbox applications. Manufactured from high-quality FKM or nitrile rubber, this End Cover (End Cup) Oil Seal offers excellent sealing for shaft ends, preventing oil leakage and protecting internal transmission components.

Brand Name CFKS OEM  Accpetable
Material NBR FKM Silicone  Features  wear resistance
Dimensions Customized Certificate  ISO9001/TS16949
Type EC Oil Seal  Packing 1 pc per bag

 

1️⃣ EC Oil Seal for Gearbox and Reducer Applications
The CFKS Reducer End Cover EC Oil Seal is specifically engineered for sealing open housings and shaft ends in gearboxes, reducers, and mechanical transmissions. Its end cap (or end cup) design effectively blocks oil from escaping while protecting internal parts from dust and external contamination. This EC-type rubber oil seal is an ideal solution for stationary shaft sealing, commonly found in industrial and automotive gearbox systems.

2️⃣ Durable FKM & Nitrile Rubber Options
Crafted using Nitrile (NBR) and Fluorocarbon (FKM) rubber materials, the CFKS EC Oil Seal is designed to withstand harsh operating conditions. NBR rubber offers excellent resistance to oils and grease, making it perfect for standard industrial use. For high-temperature or chemically aggressive environments, FKM rubber provides superior resistance and long service life. Both materials maintain elasticity, sealing performance, and resistance to wear over time.

3️⃣ Precise Fit for Efficient Sealing
The EC End Cup Cover design ensures a precise, interference fit into housing bores—without direct contact with rotating shafts. This design reduces friction, minimizes heat buildup, and extends the lifespan of the seal. The CFKS EC Oil Seal is available in a wide range of diameters and thicknesses to suit different reducer and gearbox designs, ensuring reliable sealing and optimal protection for critical power transmission components.

Frequently Asked Questions (FAQ)

Why does my CFKS oil seal fail prematurely? Common causes and prevention tips2025-06-26T15:44:39+08:00

Premature oil seal failure can result from improper installation, poor shaft finish, incorrect material selection, or excessive pressure. To prevent this, ensure the shaft surface is smooth and within tolerance, use correct tools during installation, and choose seals made from materials compatible with your media and temperature.

How to correctly install a CFKS industrial oil seal to avoid leakage2025-06-26T16:04:32+08:00

Always clean the shaft and bore before installation. Use appropriate seal drivers to avoid deformation. Lubricate the lip before fitting to reduce friction during the first rotation. Ensure the seal is seated evenly and not tilted to avoid leaks.

What to do when your CFKS hydraulic seal is leaking under pressure2025-05-20T16:33:14+08:00

Check if the pressure exceeds the seal’s rated limit. Examine for wear, hardening, or improper installation. Replace the seal if damaged, and consider upgrading to a high-pressure CFKS seal variant. Also, verify that the housing and shaft are properly aligned.

How to choose the right CFKS oil seal for extreme operating environments2025-05-20T16:34:39+08:00

For high temperatures, aggressive chemicals, or abrasive environments, choose CFKS seals made of FKM, PTFE, or high-performance elastomers. Consider using seals with protective dust lips or metal casing. Our team can recommend the best fit for your application.

 

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