cylinder rod wiper
Oil seals work by creating a tight seal around the rotating shaft. This prevents oil and other fluids from escaping while allowing the shaft to rotate smoothly. The seal is usually made up of a lip that fits snugly against the shaft, preventing any leaks from occurring. Some oil seals also have additional features, such as springs or gaskets, to provide extra support and ensure a secure fit.
oil seal for rotating shaft

Sewing machines come in a range of types designed for different applications and abilities. One of the main categories is heavy duty versus standard sewing machines. Heavy duty sewing machines are made for intensive, high-volume, and heavy fabric sewing, while standard machines are more for basic home and garment construction on lighter fabrics. There are some key differences that set heavy duty and standard machines apart.