Boring Head Set, 3MT

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The carbide tipped 9-piece boring bar set includes three different length boring bars each for minimum bores of 5/16", 7/16", and 9/16". The bore depth ranges from 3/4" to 3". The heat treated, alloy steel shanks are held to 0.000 to -0.0005" from the nominal diameter.The drawbar thread is 3/8"-16.Note: If you have a Grizzly G8689 or Micro-Mark 82573 mini mills with the 3 Morse taper spindle, that has a metric threaded drawbar, you will need our 3/8"-16 threaded drawbar P/N 1637 to use this boring head. Show more