My Tobin Arp line boring machine has a 1.125 dia. bar,I am making a smaller 1",tool bit is held in by hand screw in the end of bar pushing a 5/16 rod against the tool.
The end of bar is bored 9/16 dia.x 2.750 deep leaving 6-1/4" to drill for 5/16 rod,how would you fellows go about drilling 5/16 hole that deep?
Thanks Randall
Making boring bar for tobin arp
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