Indexable Inserted Broach Tools

Razorform Tools has a new twist on the replaceable insert concept for broaching tools.

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Razorform Tools has a new twist on the replaceable insert concept for broaching tools. Its Razorform tool system is said to be the industry’s first indexable-insert-style broaching tool, providing two cutting edges per TiN-coated, micro-grain carbide insert. Once one insert edge becomes worn, a machine operator removes two screws securing the sizeable insert to the tool body and flips the insert around to the second cutting edge. This design not only decreases tooling cost, but also increases tool life and performance, the company says.

The size and geometry of the Razorform insert, in addition to the support provided by the tool body, offer stability during the cut to reduce chatter. The force of each longitudinal cut is directed through the middle of the insert and the heat-treated, 4140-steel tool body, which also contributes to overall system rigidity. The inserts are currently available in sizes to create slots from 1/8” to 5/16” wide. Custom widths are also available.

The company recommends using coolant during broaching operations primarily to wash chips out of the slot during machining. A typical depth of cut is 0.0015 inch per pass, but smaller depths may be necessary when broaching extremely hard materials.