Archive for April 23rd, 2025

What is a Cassette Seal? A cassette seal—also known as a cartridge seal or unitized seal—is a fully assembled, self-contained sealing solution engineered for rotary shaft applications. Unlike traditional lip seals or mechanical face seals that require separate components to be aligned and fitted individually, a cassette seal integrates all necessary sealing elements into a […]

What Does a Hub Oil Seal Do? A hub oil seal (also known as a wheel hub seal or hub seal) is a critical component in automotive and industrial systems, serving as a barrier between the rotating wheel hub and stationary axle housing. Its primary role is to retain lubricants and exclude contaminants, ensuring the […]

What is an S-Type Oil Seal? An S-type oil seal (also called an S-seal or Type A radial shaft seal per DIN 3760/ISO 6194-1) is a standardized single-lip rotary shaft seal designed to retain lubricants and prevent fluid leakage in low-pressure applications. Its name originates from the S-shaped cross-section of its elastomeric sealing lip, which […]