A straight coupler is a mechanical component used to connect two axes and transmit torque, divided into two types: European and American. Their main differences lie in the connection method and structural design.

European straight couplers usually adopt a design of inner grooves and outer convex grooves, which are connected by interlocking the grooves and convex grooves at both ends. This design has a simple structure, is easy to install and disassemble, and is suitable for general transmission needs.

The American straight coupler, on the other hand, uses threaded or keyway connections to achieve connection through bolts or bearings. This design structure is more sturdy and stable, suitable for use in situations with high torque or harsh working environments.

In addition, European straight couplers are usually more compact and suitable for situations with limited space; The American straight coupler is more sturdy and durable, suitable for high load and high-speed transmission situations.

When choosing, it is necessary to determine which type of straight coupler to use based on the specific usage environment and transmission requirements.