Sealing Excellence, Securing Industry

CFKS NBR TBV Oil Seal 50*70*7 Metric Lip Seal with Garter Spring TBV Skeleton Oil Seal

The CFKS TBV Type Skeleton Oil Seal 50*70*7 is a premium metric lip seal designed to provide superior fluid containment in heavy-duty rotating shaft applications. Utilizing a precision-engineered NBR compound bonded to a rigid metal casing, this profile integrates a calibrated garter spring to maintain optimal radial contact force, ensuring consistent sealing efficiency even under shaft runout conditions.

  • Optimized Radial Load: The integrated steel garter spring compensates for shaft eccentricities, maintaining a constant lip force against the rotating axis.

  • Enhanced Structural Rigidity: Built with a reinforced steel skeleton inner case to ensure a secure press-fit inside the housing bore, preventing OD bypass.

  • Excellent Hydrodynamic Sealing: The specialized TBV lip geometry actively pumps migrating oil back into the reservoir, significantly reducing frictional heat.

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

Product Name CFKS TBV Skeleton Oil Seal Specification Dimensions: 50*70*7
Material NBR / FKM / PU / Steel Feature Wear-Resistant, High-Speed Performance
Work Temperature -20℃ to 220℃  Hardness 70 to 85 Shore A
Type TBV Metric Lip Seal Usage Hydraulic Pumps, Industrial Gearboxes, Electric Motors, Agricultural Axles, Reduction Gears, Machine Tool Spindles

 

The TBV configuration optimizes dynamic sealing through a balanced combination of radial lip tension and hydrodynamic assistance. Unlike standard single-lip seals, the TBV skeleton profile features a precision-molded sealing lip energized by a mechanical garter spring. As the shaft rotates at high peripheral speeds, the spring exerts a continuous, uniform radial force that counteracts shaft deflection and centrifugal forces. This design creates a controlled microscopic fluid film between the rubber lip and the shaft interface, preventing direct dry friction while blocking oil migration along the axial pathway.

This profile utilizes a high-grade NBR formulation as its primary elastomer casing, making it highly effective for standard industrial machinery operating with mineral oils, greases, and aliphatic hydrocarbons. NBR provides exceptional resistance to mechanical wear and tearing. However, for specialized systems operating beyond standard thermal limits or utilizing synthetic lubricants, FKM alternatives are recommended. While NBR maintains excellent seal integrity and flexibility up to 100℃, upgrading to FKM ensures long-term resistance to ozone cracking, chemical degradation, and extreme temperature spikes.

Achieving a long operational lifespan requires careful attention to the mating surface and correct press-fitting procedures. The TBV skeleton seal features a rubber-covered outer diameter that accommodates minor housing imperfections, reducing the risk of bore scoring during installation. Because the garter spring maintains tight contact, initial pre-lubrication of the seal lip during assembly is critical to eliminate dry-running wear during the initial startup phase, drastically extending field maintenance intervals.

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
TCV TYPE SEAL SIZE LIST
SizeTypeMaterialColor
12*30*5BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
13*19*2.5BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
14*25*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
16*30*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
17*30*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
17*30.3*8BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
17*32*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
17*35*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
17.46*28.58*5.7/6.3BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
18*30*10BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
18*30*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
18*35*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
18*35*8BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
18*35*9BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*27*5BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*30*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*32*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19.5*33*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*35*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19.5*30*6/6.5BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*35*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*35*8BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*35*3/7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*37*6.5/7.5BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
19*44.45*6.35BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*32*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*32*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*35*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*40*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*47*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*47*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
22*30*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
22*32*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
20*32*6.5/8.6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
22*35*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
22*36*10BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
22*36*7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
22*42*10BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
24*34*6.3BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
24*38*6/7BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
24*38*8BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
24*55*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
25*33*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN
25*35*6BABSL CFW / TCV OIL SEALNBR/FKMBLUE/BROWN

MESSAGE

Go to Top