TC Type Double Lip Skeleton Seal-17M-30-11220

Core Features

Dynamic Leak-Proof Oil Sealing: The main lip and self-tightening spring provide constant radial pressure, preventing oil leakage along the shaft end, avoiding oil loss and insufficient lubrication of components, and ensuring stable pressure in the transmission/hydraulic system.

Double-Lip Dust Protection: The secondary lip blocks dust, mud, and gravel from entering in mining/construction environments, preventing lubricant emulsification and component wear and corrosion.

Shaft System Adaptation and Compensation: The lip elasticity adapts to minor wear and runout of the shaft diameter, and the self-tightening spring compensates for the elasticity loss after lip aging, maintaining long-term sealing performance.

Installation and Positioning Support: The metal frame ensures no deformation during installation, and the interference fit with the seat hole achieves static sealing, accurately positioning the shaft end sealing position and avoiding offset friction.

Friction and Temperature Control Stability: The narrow sealing band design reduces rotational friction, controls temperature rise, adapts to medium- and high-speed rotation conditions, and has no significant thermal degradation.

Product Superiority

Original Factory Precision Fit: Manufactured according to Komatsu original drawings, the inner diameter, outer diameter, width, and lip interference fit are perfectly matched to the D275 shaft end/seat bore, requiring no modification. After press-fitting, it is seamlessly compatible with the shaft and housing, avoiding leakage or abnormal wear caused by installation gaps.

Oil and Aging Resistance: Nitrile rubber (NBR) lip + cold-rolled steel skeleton + stainless steel self-tightening spring, resistant to gear oil/hydraulic oil, anti-aging, tear-resistant, with a service life of over 3000 hours.

Durable and Reliable Sealing: Double lip + built-in spring structure, the main lip seals oil, and the secondary lip prevents dust. It maintains a seal even with minor shaft diameter wear; uniform lip contact pressure, rotational friction coefficient ≤0.003, temperature rise ≤15℃, suitable for continuous heavy-duty operation.

Strong Working Condition Adaptability: Temperature range -40℃ to 120℃, vibration and impact resistant, suitable for dusty, humid, and temperature-varying working environments such as mining and construction, not easily deformed or cracked.

Easy installation and maintenance: The standard frame structure allows for quick installation using press-fit tools, eliminating the need for specialized equipment, reducing downtime during maintenance and lowering maintenance costs.

Applicable Scene

This product is designed for Komatsu D275 bulldozers in heavy-duty continuous operations such as mine stripping, large-scale infrastructure projects, and land leveling. It is particularly suitable for sealing key rotating shaft components including the gearbox, final drive, and hydraulic pump. For optimal performance, it is recommended to replace these seals simultaneously with bearings and gaskets to enhance the reliability of the transmission and hydraulic systems.