Sealing Excellence, Securing Industry

CFKS DC Type Oil Seal 30*42*10.5 NBR DC Rubber Seal Wear Resistant DC Skeleton Oil Seal

The CFKS DC Type Oil Seal 30*42*10.5 is a high-performance rotary shaft seal featuring a dual-lip design and a reinforced metal skeleton. Specifically engineered for demanding industrial environments, it provides a reliable barrier against contaminants while maintaining internal lubrication integrity.

  • Dual-Lip Protection: Primary lip for fluid retention and a secondary dust lip to block external debris.

  • Precision Engineering: Dimensions of 30*42*10.5 ensure a perfect interference fit.

  • Material Versatility: Available in NBR for general use or FKM for high-temperature and chemical resistance.

Find your sealing solution with CFKS — contact us for a quote.

Parameter Details Parameter Details
Product Name DC Type Oil Seal Specification 30*42*10.5
Material NBR / FKM / PU Feature High Pressure & Wear Resistance
Work Temp. -20℃ to 220℃ Hardness 70 – 90 Shore A
Type DC Skeleton Oil Seal Usage Gearboxes, Pumps, Electric Motors, Agricultural Machinery, Construction Equipment

The DC profile is designed to address simultaneous internal and external sealing challenges. Unlike standard single-lip seals, the DC type utilizes a primary sealing lip energized by a garter spring to counteract centrifugal forces and maintain constant contact with the rotating shaft. The auxiliary lip acts as a secondary shield, preventing the ingress of dust, dirt, and moisture, which significantly extends the service life of both the seal and the bearing it protects.

CFKS offers this seal in two primary elastomers to suit diverse operational media. NBR is the industry standard for petroleum-based oils and hydraulic fluids, offering excellent wear resistance within a standard temperature envelope. For applications involving synthetic lubricants or aggressive chemicals, our FKM variant provides superior thermal stability and oxidative resistance, ensuring the polymer chain remains intact even under localized frictional heat.

The rigid metal skeleton of the DC type seal ensures structural stability during the press-fit installation process, preventing O.D. deformation. A key operational advantage is the “low-friction” lip geometry, which reduces torque loss and heat buildup. During maintenance, the robust construction allows for easier visual inspection of the housing bore, ensuring that replacement cycles are predictable and downtime is minimized.

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
DC Type Oil Seal Size List
SIZEMaterialTYPE
52*72*8NBR/FKM/VitonDC Type Oil Seal
50*70*12NBR/FKM/VitonDC Type Oil Seal
50*65*10NBR/FKM/VitonDC Type Oil Seal
45*72*12NBR/FKM/VitonDC Type Oil Seal
48*72*12NBR/FKM/VitonDC Type Oil Seal
45*70*12NBR/FKM/VitonDC Type Oil Seal
45*70*10NBR/FKM/VitonDC Type Oil Seal
45*65*10NBR/FKM/VitonDC Type Oil Seal
45*62*12NBR/FKM/VitonDC Type Oil Seal
45*60*12NBR/FKM/VitonDC Type Oil Seal
45*60*10NBR/FKM/VitonDC Type Oil Seal
40*72*10NBR/FKM/VitonDC Type Oil Seal
40*65*12NBR/FKM/VitonDC Type Oil Seal
40*65*8NBR/FKM/VitonDC Type Oil Seal
40*62*12NBR/FKM/VitonDC Type Oil Seal
40*62*8NBR/FKM/VitonDC Type Oil Seal
40*60*10NBR/FKM/VitonDC Type Oil Seal
35*56*12NBR/FKM/VitonDC Type Oil Seal
30*50*10NBR/FKM/VitonDC Type Oil Seal
30*50*8NBR/FKM/VitonDC Type Oil Seal
48*68*10NBR/FKM/VitonDC Type Oil Seal
60*85*12NBR/FKM/VitonDC Type Oil Seal
60*80*12NBR/FKM/VitonDC Type Oil Seal
60*80*10NBR/FKM/VitonDC Type Oil Seal
60*80*8NBR/FKM/VitonDC Type Oil Seal
26*37*10.5NBR/FKM/VitonDC Type Oil Seal
37*37*10.5NBR/FKM/VitonDC Type Oil Seal
30*42*10.5NBR/FKM/VitonDC Type Oil Seal
30*42*11NBR/FKM/VitonDC Type Oil Seal
33*45*10.5NBR/FKM/VitonDC Type Oil Seal
33*46*11NBR/FKM/VitonDC Type Oil Seal
31*43*10.3NBR/FKM/VitonDC Type Oil Seal
31*43*10.5NBR/FKM/VitonDC Type Oil Seal
50*65*11.5NBR/FKM/VitonDC Type Oil Seal
43*55*11NBR/FKM/VitonDC Type Oil Seal
35*48*11NBR/FKM/VitonDC Type Oil Seal
37*50*11NBR/FKM/VitonDC Type Oil Seal
27*39*10.5NBR/FKM/VitonDC Type Oil Seal
32*44*8NBR/FKM/VitonDC Type Oil Seal
32*44*10.5NBR/FKM/VitonDC Type Oil Seal

 

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