What Is a Tool Holder Bushing?
Tool holder bushings are tools used to attach the turning centers that hold the material and the bites that cut the material.
In mechanical engineering, a bushing is a cylindrical part designed to fit a machine. The outside diameter of tool holder bushings is designed to fit the holder, chuck, or collet attached to the turret or tailstock.
Tool holder bushings, on the other hand, are available in a variety of inner diameters to match the diameter of the bites to which they are attached.
Usage of Tool Holder Bushings
Tool holder bushings are mainly used for machining of materials such as metals, but other machining can also be performed by attaching a tool other than those used for machining through tool holder bushings.
Tool holder bushings are mainly used to attach boring bars, reamers, etc. when drilling with a lathe. Tool holder bushings equipped with a positioning mechanism can be used to fine-tune the center position for more accurate machining.
Principle of Tool Holder Bushings
Tool holder bushings are installed by inserting them into a holder or the like installed on the turret or tailstock. Then, a tool that matches the inside diameter of the tool holder bushing is inserted into the bushing and secured with a screw or other fastening part from the top of the holder.
Tool holder bushings with a positioning mechanism have a positioning screw in addition to the fixing screw hole, and the center position can be adjusted by turning this screw. The shaft of a boring bar or reamer that is inserted into tool holder bushings is called the shank, and its thickness is called the shank diameter.
When selecting tool holder bushings, it is important to make sure that the inside diameter of the bushing matches the shank diameter of the bites to be installed. Some tool holder bushings are equipped with a cooling mechanism to prevent the temperature of the turning tool from rising. Such products have holes drilled into the tool holder bushings through which coolant can be supplied.