1. It is a work holding device that holds,supports and locates the workpiece andguides the cutting tool for a specificoperation1. It is a work holding device that holds,supports and locates the workpiece for aspecific operation but does not guide thecutting tool2. Jigs are not clamped to the drill presstable unless large diameters to be drilledand there is a necessity to move the jig tobring one each bush directly under the drill.2. Fixtures should be securely clamped tothe table of the machine upon which thework is done.
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