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Cole-jaw extenders #2: Making the extender segments

04-13-2021 09:54 PM by BuckeyeDennis | 2 comments »

These jaw extenders are so easy to make that they hardly need any instructions. I’ll let the pictures do most of the talking. Cut a square piece of plywood to the desired extension-jaw diameter. This will be the diameter when the jaws are closed. Lay out centerlines, diagonals, and the OD. With the jaws fully closed, clamp the chuck and cole-jaw assembly to the workpiece, aligned as shown. Transfer the jaw-extender mounting holes to the workpiece using a transfer punch. Now finish the layout (which I should have done originally). The corners have to be notched out as shown, to leave clearance for the T-handle of the chuck wrench. The inner circle is the OD of th...

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