The new collet chuck-style broach toolholders are said to be versatile because they use ER-style collets, which are designed to reduce the three-screw method of centering the HSS broach in the broach toolholder. The ER-style collet will hold virtually any diameter shank broach tool in the holder within the range of the collet.
A built-in stop screw allows the operator to adjust for different length broaches and to compensate for different lengths on re-sharpened broaches. The collet chuck-style broach holder also eliminates the need for centering the cutting tool to “spindle” of the broaching holder, and there are no screws to knock the cutting tool off center.
Successful applications include the producing of various internal-shaped forms such as hex, square, double hex, straight spline, involute spline, multi keyway, knurl and socket heads.
Editor PickThrough-Coolant for Swiss Machines
This system allows shops to quickly transform the standard external-coolant live tooling heads on their turning machine turrets into those with through-tool-coolant capability.