A shaft coupling is a mechanical component that connects the drive shaft and driven shaft of a motor, etc., in order to transmit power. Shaft couplings introduce mechanical flexibility, providing tolerance for shaft misalignment. As a result, this coupling flexibility can reduce uneven wear on the bearing, equipment vibration, and other mechanical troubles due to misalignment.
Shaft couplings are available in a small type mainly for FA (factory automation) and a large casting type used for large power transmission such as in wind and hydraulic power machinery.
In NBK, the former is called a coupling and the latter is called a shaft coupling. Here, we will talk about the shaft coupling.
For small couplings for FA,click here.
Why Do We Need Shaft Couplings?
Even if the motor and workpiece are directly connected and correctly fixed, slight misalignment can occur over time due to changes in temperature and changes over a long period of time, causing vibration and damage.
Shaft couplings serve as an important link to minimize impact and vibration, allowing smooth rotation to be transmitted.
Flexible Flanged Shaft Couplings
- These are the most popular flexible shaft couplings in Japan that comply with JIS B 1452-1991 "Flexible flanged shaft couplings".
- A simple structure made of a flange and coupling bolts. Easy to install.
- The bushing between the flange and coupling bolts alleviates the effects of torque fluctuation and impacts during startup and shutdown.
- The bushing can be replaced simply by removing the coupling bolt, enabling easy maintenance.
- Permits lateral/angular misalignment, and reduces noise. Prevents the thrust load from being transmitted.
- 2 types are available, a cast iron FCL type and a carbon steel FCLS type.
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Choosing the most suitable coupling
We also explain the basic points for selection of the "perfect couplings" to meet customer needs. If you have struggled with selecting the perfect coupling from the many available, this is a must-see.
Coupling is a component used to connect a drive shaft and a driven part, for example, a motor shaft and a ball screw for the purpose of transmitting the torque.
Design Documents (Shaft Couplings)
This page summarizes the design data for selecting the proper flanged shaft coupling. Make use of this when designing and selecting.