R8 3" HEAD BORING TOOL SET (1001-5940)

R8 3" Head Boring Tool Set Rugged design allows excellent rigidity for chatter-free boring. Head features a threaded back for use with multiple shanks. Set complete with boring head, boring shank, carbide tipped boring bars& L-shape hex wrenches. Dial on head with 0.0005" graduation for accurate hole sizing. Fitted durable carrying case included. 1 DIV = 0.001 which means on the 0-50 dial when turning the dial by 1 division/graduation, the boring head's travel is 0.001" in radius movement and 0.002" in diameter movement. On the 0-100 dial, the boring head's travel is 0.0005" in radius movement, 0.001" in diameter movement. 12 boring bars. Boring bar hole size is 3/4". Boring head thread is 1~1/2"-18. Offset is 3/4". Crosshole is 3/4". Shank thread is 7/16"-20. Minimum bore diameter is 0.394". Maximum bore diameter is 7.874". Shipping Weight: 10 lbs