China Taper Bore Bushes

1. Basic construction and working principle of bushing connections. Bushing mates with taper bore in transmission hub through 4 semi-taper angle surface. Its keyway is used to increase elasticity . The tightening press on the shaft is caused by tightened screws. The screw structure and quantity depends on the bushings’ type and specifications. When bushings and hubs are being on the shaft. Therefore, the torque will be transmitted through frictional force. Key connection will only be the subsidiary transmission part then. To conquer the bushing’s self-locking feature, screws used for installation have been set which will allow the bushing to be removed from the shaft.

2. Bushing structure selection. The bushing can be divided into three types which can be used according to the features.

2.1 General Bushing.

This kind of bushing can achieve hub connection without increasing the transmission components’ outside dimensions. It construction is very compact. Located in the hub, it looks even and beautiful at both ends. Using cap screws as setting screws, there is a semi screw on the hub to comply with the bushing. The bushing can be connected with taper bored standard transmission parts directly or through taper weld on hubs. This is the basic type and is most widely used.

2.2 Flange Type.

This type’s structure is simple and installation is easier. Using hex screws as the tightening screws, it’s easier to adopt loosening-resistance construction and is more reliable. But its dimension is a little larger than normal so its only suitable for use where there are low requirements on dimension or weight and where the hub is shorter.

2.3 Adapters.

Adapters for taper lock bushings are recommended for usage where the hub bore is straight. Especially to the roll bearing, always meet with care, closely mating with the shaft. Too much insertion can cause difficult installation and can easily cause damage to the finished surface. If the adapter is used to connect with the bushing, all the questions will be solved then. But it should be told that using adapters will increase radial dimensions so this is more suitable where the shaft diameter is decided by the bearing dimensions not by the shaft itself. Select adapters’ type based on the bushings’ type.