Sealing Excellence, Securing Industry

CFKS Combi Oil Seal 904-50040 Combi Radial Shaft Seals

The CFKS 904-50040 Combi Oil Seal is a high-performance Combi Radial Shaft Seal engineered for extreme industrial environments. Integrating multiple sealing lips and a specialized dust exclusion system, this Combi Oil Seal provides superior protection for hubs and drive shafts. Engineered for maximum durability, the 904-50040 ensures leak-free performance while blocking heavy contaminants like mud and water, making it the ideal choice for heavy-duty agricultural and construction machinery. Find your sealing solution with CFKS — contact us for a quote.

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

 

The CFKS 904-50040 Combi Oil Seal is a state-of-the-art Combi Radial Shaft Seal engineered for the most demanding technical environments. Unlike standard single-lip seals, the Combi Oil Seal architecture integrates a traditional sealing lip with a robust, multi-stage dust and mud exclusion system into a single, compact unit. This sophisticated design ensures that lubricants are retained internally with high efficiency while external contaminants—such as grit, slurry, and moisture—are effectively blocked. The 904-50040 is an essential component for high-stress drivetrain applications where standard seals often fail.

 

Specifically developed for heavy machinery, this Combi Radial Shaft Seal excels in agricultural, construction, and mining equipment. The Combi Oil Seal 904-50040 features a reinforced metal housing and premium elastomer compounds that provide exceptional resistance to abrasive wear and thermal fluctuations. By utilizing a specialized “labyrinth” sealing effect, it offers a secondary line of defense against environmental ingress. This ensures that internal bearings and shafts remain protected even in the harshest mud-filled or dusty work sites, significantly extending the life of your equipment.

Reliability and reduced downtime are the hallmarks of the CFKS Combi Oil Seal range. The 904-50040 is precision-molded to meet exact industrial specifications, ensuring a perfect fit and a seamless replacement process that restores machinery to peak operational efficiency. For wholesalers and fleet managers, investing in high-quality Combi Radial Shaft Seals means significantly extending maintenance intervals and preventing costly shaft damage. Choose CFKS for your Combi Oil Seal needs to ensure long-term performance, superior oil retention, and total system security.

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.

CFKS Seal Manufacturing Co., Ltd.
https://cfksseals.com/
Email: cfksnacy@gmail.com  Mobile/WhatsApp/Wechat: (86) 188-3097-5917
COMBI Oil Seal Size List
SIZETYPECORTECO / NOK CODE
30*42* 14COMBI12001878B
30*44* 11COMBI12001879B
30*44*14COMBI12013519B
30*44* 17COMBI12020067B
32*50*10COMBI
32*50*14COMBI12013914B
35*50*10COMBI12001881B
35*50*13COMBI12013947B
35*52* 10COMBI12011716B
35*52* 16COMBI12001882B
35*52* 16COMBI12013466B
35*52* 16COMBI12015717B
35*52* 17/ 18.5COMBI12019673B
35*60*18.5COMBI12014167B
35*62* 12COMBI12012786B
35*72* 12COMBI12001883B
37*52* 16COMBI12014511B
40*55*10COMBI12001886B
40*55*15.5COMBI12018848B
40*58*10COMBI12001887B
40*60*18.5COMBI12012107B
40*60*25COMBI12016289B
40*62* 10COMBI12011715B
40*62* 14COMBI12001889B
40*65*18.5COMBI12013226B
40*65*27.5COMBI12020191B
40*68*14COMBI12013319B
40*68*18.5COMBI12013464B
42*62*14COMBI12001889B
42*62* 17COMBI12001890B
42*62*21.5COMBI12016507B
42*62*23COMBI12020023B
45*60*16COMBI12014997B
45*62* 11COMBI12012296B
45*62* 11.2COMBI12016814B
45*65*12COMBI12011969B
45*65*15COMBI12001894B
45*65*16COMBI12019329B
45*65*18.5COMBI12012377B
45*65*21COMBI12013466B
45*65*25COMBI12018030B
45*75*27.5COMBI12020036B
46*60*16COMBI12014997B
46*65*16COMBI12019329B
46*65*21COMBI12013466B
46.15*80*16.5COMBI12016669B
47*65*16.5COMBI12015734B
47*65*19COMBI12020133B
48*65*11COMBI12011991B
48*65*16.5COMBI12077310B
48*65*18.5COMBI12017310B
48*65*19COMBI12036965B
48*74* 13COMBI12001898B
48*74* 18.5COMBI12017349B
50*65*18COMBI12018616B

 

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