The Four Jaw Chuck - 4: Removing and Reversing Jaws
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WARNING: Machine tools present a safety hazard. Improper operation can result in severe injury. These topics are for non-laboratory study only and are not to be used in conjunction with the operation of any tool or machine described herein. Never use a machine tool without the supervision of a qualified instructor.

Each jaw is independently held into the chuck so each jaw can be removed independently from the others.

When reversing jaws, be sure not to force a jaw onto the guide rails with the screw. "Wiggle" or tap them in with a rubber or lead mallet

Jaws are generally considered outside or inside depending on which way the part is located on the jaws. There are some chucks that have the ability to remove the top part of the jaw and reverse it, without removing the master jaw. This makes setups much easier.

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label: four jaw chuck advantages, disadvantages, inricating round part, removing and reversing jaws