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CFKS J Type Shaft Seal 25*37*5/9 J Type NBR Rubber Oil Seal Single Lip Oil Seal With Spring

CFKS J type 25*37*5/9 shaft seal 25×37×5/9 is a spring-loaded single lip 25 37 5/9 oil seal 25-37-5/9 made from oil-resistant NBR rubber. Designed for rotary shaft sealing, it provides stable sealing pressure, excellent oil retention, and long service life. Suitable for gearboxes, pumps, motors, and various industrial equipment.

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 25*37*5/9 J Type Oil Seal  Packing 1 pc per bag

 

The CFKS J Type shaft seal 25*37*5/9 is a high-quality single lip oil seal designed for rotary shaft sealing applications. Equipped with a garter spring, this J type oil seal provides stable radial sealing force, ensuring effective oil retention and reduced leakage during operation.

Manufactured from durable NBR rubber, this J type shaft seal offers excellent resistance to lubricating oils, grease, and wear. The spring-loaded sealing lip compensates for shaft eccentricity and material aging, maintaining consistent sealing performance over long-term use.

CFKS J type rubber oil seals are widely used in gearboxes, motors, pumps, reducers, and general industrial machinery. With precise dimensions and reliable material quality, this single lip shaft seal delivers dependable sealing efficiency and extended service life in various industrial environments.

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
J TYPE SEAL SIZE LIST
TypeSIZEMaterialSIZEMaterial
J Type8*18*7PU8*18*7NBR/FKM
J Type10*20*7PU10*20*7NBR/FKM
J Type12*22*7PU12*22*7NBR/FKM
J Type14*24*7PU14*24*7NBR/FKM
J Type16*26*7PU16*26*7NBR/FKM
J Type18*28*7PU18*28*7NBR/FKM
J Type20*32*9PU20*32*9NBR/FKM
J Type22*34*9PU22*34*9NBR/FKM
J Type25*37*9PU25*37*9NBR/FKM
J Type28*40*9PU28*40*9NBR/FKM
J Type30*42*9PU30*42*9NBR/FKM
J Type32*44*9PU32*44*9NBR/FKM
J Type35*47*9PU35*47*9NBR/FKM
J Type36*48*9PU36*48*9NBR/FKM
J Type38*50*9PU38*50*9NBR/FKM
J Type40*52*9PU40*52*9NBR/FKM
J Type45*57*9PU45*57*9NBR/FKM
J Type50*62*9PU50*62*9NBR/FKM
J Type52*64*9PU52*64*9NBR/FKM
J Type55*69*11PU55*69*11NBR/FKM
J Type60*74*11PU60*74*11NBR/FKM
J Type63*77*11PU63*77*11NBR/FKM
J Type65*79*11PU65*79*11NBR/FKM
J Type70*84*11PU70*84*11NBR/FKM
J Type75*89*11PU75*89*11NBR/FKM
J Type80*94*11PU80*94*11NBR/FKM
J Type85*99*11PU85*99*11NBR/FKM
J Type87*101*11PU87*101*11NBR/FKM
J Type90*104*11PU90*104*11NBR/FKM
J Type92*106*11PU92*106*11NBR/FKM
J Type95*109*11PU95*109*11NBR/FKM
J Type100*114*11PU100*114*11NBR/FKM
J Type105*121*13PU105*121*13NBR/FKM
J Type110*126*13PU110*126*13NBR/FKM
J Type115*131*13PU115*131*13NBR/FKM
J Type120*136*13PU120*136*13NBR/FKM
J Type125*141*13PU125*141*13NBR/FKM
J Type130*146*13PU130*146*13NBR/FKM
J Type135*151*13PU135*151*13NBR/FKM

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