The End Mill Holder to 7/8-20 Criterion Boring Head (P/N 12141) threads onto our ¾-16 Morse #1 spindle thread.
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End Mill Holder to 7/8-20 Criterion Boring Head
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Spindle “Tommy” Bar
Spindle “Tommy” Bars are use to aid in the operation of opening and closing scrolling chucks and in the headstock spindle to provide leverage when unthreading tooling. They have a diameter of 5/32″ and are 3-1/8″ long.
