Tool holder design principles in automatic tool changer | ATC-Spindle.com

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(1) It is possible to mount different sizes of cutting tools on the same ATC spindle.

(2) Also, the tool change operation is easy.

(3) Ensure the repeatability of the tool installation position, that is, position the tool at the center of the ATC spindle so that the relative position of the tool and the workpiece can be within the allowable tolerance range each time using the tool.

(4) The tool can be installed quickly and easily outside the machine.

In fact, there are many types of tool holders available for use in the CNC shop. And the two most common types are V-type flange holders and BT-type flange holders.

These two types have become international standards. In the United States today, most of the holders are CAT type, while the BT type flange holders are mainly concentrated in Europe. The above two tool holders cannot be interchanged on the same ATC spindle.

The V-Flange shank has a large slope on the vertebral body, which allows the tool to be accurately positioned at the center of the ATC spindle. When the tool changer performs the tool change operation, the part where the tool is clamped is at the V-flange of the shank. In most cases, the V-flange holder is suitable for applications where the ATC spindle speed is below 10,000 r/min.

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