Oil Seal 20x37x7 HMSA10 V SKF - FKM Shaft Seal

Application and Sealing Function

The 20x37x7 HMSA10 V SKF oil seal is a high-performance shaft seal designed for reliable rotary sealing in demanding industrial and automotive applications. This seal is used where standard NBR oil seals are insufficient due to elevated temperatures or aggressive operating conditions.

The HMSA10 design indicates a single-lip oil seal with a metal outer case and an integrated garter spring, ensuring constant radial pressure on the shaft and effective oil retention during continuous rotation.

Typical industrial applications include:

• internal combustion and electric engines,

• gearboxes and transmission systems,

• pumps and drive units,

• machinery operating at elevated temperatures.

FKM (Viton®) Material - High Durability and Resistance

The sealing lip is manufactured from FKM (fluoroelastomer, Viton®), identified by the letter “V” in the SKF designation. FKM is known for its high resistance to oils and greases, fuels, and a wide range of chemicals, as well as excellent thermal stability.

Key advantages of FKM include:

• continuous operation at high temperatures (up to approx. +200°C),

• minimal material aging,

• long service life in harsh operating environments.

This makes the HMSA10 V oil seal suitable for applications requiring high durability and consistent sealing performance.

Technical Data

• Type: oil seal / shaft seal

• Shaft diameter: 20 mm

• Housing diameter: 37 mm

• Width: 7 mm

• Material: FKM (Viton®)

• Design: HMSA10 - single lip oil seal with garter spring

• Operating mode: rotary sealing

• Manufacturer: SKF

• Applications: engines, gearboxes, pumps, industrial machinery

Main Description

The 20x37x7 HMSA10 V SKF oil seal is a professional technical sealing solution designed for long-term operation under high thermal and chemical loads. As an oil seal made of FKM, it provides reliable protection against oil leakage in applications where standard elastomers may fail.

The single-lip design with a precision garter spring ensures stable contact with the shaft, maintaining consistent sealing performance throughout the service life. This product is intended for B2B customers, maintenance departments, and service workshops that require high-quality shaft seals with predictable performance and dimensional accuracy.

FAQ - Frequently Asked Questions

What is the difference between FKM and NBR oil seals?
FKM offers significantly higher temperature and chemical resistance than NBR.

Is HMSA10 a single-lip oil seal?
Yes, HMSA10 indicates a single-lip design with a garter spring.

Is this oil seal suitable for high-temperature applications?
Yes, FKM allows operation at temperatures up to approximately +200°C.

How do I select the correct oil seal size?
The inner diameter must match the shaft diameter (20 mm), and the outer diameter must match the housing (37 mm).