Sealing Excellence, Securing Industry

CFKS Industrial JA Shaft Rotary Oil Seal 30*40*5/9 Stable Sealing JA Rubber Oil Seal

CFKS industrial JA 30 40 5/9 shaft rotary oil seal 30-40-5/9 is a durable NBR rubber oil seal 30*40*5/9 designed for stable rotary shaft sealing. This JA oil seal 30×40×5/9 provides reliable oil retention, excellent wear resistance, and reduced leakage during operation. Widely used in motors, pumps, gearboxes, and industrial equipment, it ensures consistent sealing performance and long service life in demanding environments.   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 JA Oil Seal 30*40*5/9  Packing 1 pc per bag

 

The CFKS Industrial JA Shaft Rotary Oil Seal 30*40*5/9 is a high-performance JA oil seal designed for reliable rotary shaft sealing applications. Engineered for stable sealing performance, this JA shaft oil seal effectively prevents oil leakage while protecting equipment from dust and contaminants.

 

Manufactured from durable NBR rubber, this JA rotary oil seal provides excellent oil resistance, wear resistance, and flexibility under continuous operation. The optimized single lip sealing design ensures consistent contact pressure on the shaft surface, delivering dependable sealing efficiency and reduced leakage.

CFKS JA rubber oil seals are widely used in motors, pumps, gearboxes, reducers, and general industrial machinery. With precise dimensional control and high-quality material construction, this rotary oil seal ensures long service life, stable sealing performance, and improved equipment reliability in 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
JA Dust Wiper Seal
18*28*5/975*87*7/11160*178*9/14
20*30*5/980*92*7/11165*183*9/14
22*32*5/985*97*7/11170*188*9/14
25*35*5/988*100*7/11175*193*9/14
28*38*5/990*102*7/11180*198*9/14
30*40*6/1095*119*7/11185*203*9/14
30*42*6/10100*112*7/11190*208*9/14
35*45*6/10105*119**8/12195*213*9/14
40*50*6/10110*124*8/12200*218*9/14
45*55*6/10115*129*8/12210*228*9/14
50*60*6/10120*134*8/12220*238*9/14
55*67*7/11125*139*8/12230*248*9/14
56*68*7/11130*144*9/14240*258*9/14
60*72*7/11135*149*9/14250*268*9/14
63*75*7/11140*158*9/14260*278*9/14
65*77*7/11145*163*9/14270*288*9/14
70*82*7/11150*168*9/14280*298*9/14
72*84*7/11155*173*9/14300*318*9/14

MESSAGE

Go to Top