SKF Shaft Seal 30x42x7 HMSA10 RG - NBR Radial Oil Seal

Applications

The SKF 30x42x7 HMSA10 RG is a high-quality radial shaft seal designed to provide reliable sealing of rotating shafts in systems lubricated with oil or grease. This model is widely used in industrial gearboxes, pumps, electric motors, reduction units, agricultural machinery, automotive systems and other mechanical assemblies requiring stable and durable sealing.

The HMSA10 design features a primary sealing lip supported by a spring to maintain constant contact with the shaft surface, plus an integrated dust lip that prevents ingress of dirt and external contaminants. The sealing element is made of NBR (nitrile rubber), which ensures resistance to oils, lubricants, fuels and retains elasticity in working temperature ranges typical for industrial environments.

Advantages

• Original SKF product - proven performance and quality consistency.

• High durability in continuous operation under dynamic shaft movement.

• NBR elastomer provides excellent resistance to oils, greases and hydrocarbons.

• Double-lip design (HMSA10) enhances protection against contamination.

• Suitable for industrial, automotive and agricultural applications.

Technical Specifications

FAQ

Q1: Is this an original SKF seal?
Yes — this is a genuine SKF HMSA10 RG oil seal.

Q2: What is the purpose of the second lip in HMSA10?
The dust lip protects the sealing area from external contamination, increasing lifespan and reliability.

Q3: Can this seal be used in engines and gearboxes?
Yes, the NBR compound and HMSA10 design make it suitable for oil-lubricated rotating shafts, including engines, pumps and transmissions.

Q4: Should I lubricate the lip before installation?
Yes — apply a thin layer of oil or grease to prevent dry running on start-up.

Q5: How do I ensure correct fitment?
Match the shaft diameter (30 mm), housing diameter (42 mm) and width (7 mm); ensure shaft surface is smooth and not worn.