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Tool cutters

Tool clamping describes the way in which certain types of cutters are attached to the clamp in the machine. These cutters, referred to as collet cutters, have a through hole in the middle of the body. This hole slides them onto the cylindrical or tapered part of the chuck, which is called the milling arbor. A tongue and groove system is used to transmit the rotary motion from the machine to the cutter and prevent it from rotating under load. The cutter has a groove milled into the hole, into which the drift stone or "feather" located on the mandrel fits. This ensures that the cutter rotates with the chuck. To prevent the tool from slipping off the mandrel, it is axially locked, most often by a central screw which pulls it firmly against the face of the chuck. This system is mainly used on larger diameter milling cutters, such as end mills or disc milling cutters, where a strong and stable connection is needed to transmit high forces during machining.

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