Slater Tools Inc. produces Rotary Broaching tools which can be used to produce gears and other internal and external forms on the end of a work piece while it is rotating. The entire operation takes seconds, and is capable of producing accurate forms usually smaller than 1 inch diameter within 0.0005". The advantages of performing this operation are that it almost always costs less than a secondary operation, can be overlapped to increase speed and profitability during production, and will not sacrifice accuracy. Unlike conventional broaching, which may push a series of forms that increase in size through a hole until the desired form is achieved, the rotary broach cuts the full form, one corner at a time in the first pass.

The rotary broach tool holder is designed to hold the broach at a 1 degree angle using its internal live spindle. The spindle spins freely within the holder, and is driven by contact with the rotating work piece. Thus, while rotating, pressure on each corner of the broach is constantly changing. This creates a chisel type action as it is fed through the work piece to the desired depth. Because speeds are up to 2000 rpm, most full form broaching takes approximately 10 to 15 seconds. This moves the holder around the centerline of the hole at a 1° angle, creating a "wobble" appearance. Although the holder continues to hold the broach with great precision, rotary broaching is often referred to as "wobble broaching" for this reason.