Couplings used in hydraulic systems are divided into rigid connections and flexible connections. Flexible connection couplings are the basic choice for matching bell shaped covers,

There are three commonly used flexible couplings: nylon internal gear coupling, plum blossom coupling, and star shaped coupling

How many nylon internal gear couplings are currently made of cast iron, powder metallurgy, and 45 steel on the market

The plum blossom coupling is made of cast iron and 45 steel

The star shaped coupling is made of cast steel, aluminum alloy, and 45 steel

Three types of couplings are recommended to use star shaped couplings. If you pursue low cost and no noise considerations, you can choose cast iron internal gear couplings

• Previous：How to choose a suitable bell shaped cover for installing motors with irregular dimensions
• Next：Selection of Bell shaped Hood Models