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Long Hole Drilling Set

  • Long hole boring set: bit plus hollow center
  • Handle end of bit and center
  • Bit with tape measure

Product Description

This is a long hole boring set for drilling on the lathe.  It comes with the new Hamlet 3/8"diameter long bit  (21.5" long  for the bit and 10" additional for the handle) plus the Oneway 3/8" hollow center in a #2 Morse taper.  If you have a hollow tailstock  (through hole) simply place the center in the tailstock and drill from outside through the hollow and 

into the wood.  If you do not have a hollow tailstock, you can drill through the headstock if you have a reversing feature.  In that case  it will work but you may loose a lot of length for drilling if the headstock has considerable length.   It is possible to flip the piece you are drilling end for end and connect the holes.  


This set up is a bit different from previous shell auger or lamp bits:  this bit is made from high speed steel so bluing will not harm the cutting edge, the cutting edge is a shearing angle so it enters the cut progressively and there are twists on the shank to aid with chip removal.  From my own experience clearing the chips is a major problem with any type of long hole drilling on the lathe.  I have had the best success of drilling, withdrawing when I feel any resistance, drill, remove and clear chips, etc. 


If you are making lamps you will find that threaded pipe  for lamp making is usually 3/8" outside diameter.  The hole you drill with this bit is slightly under 3/8" so the pipe will not enter the hole.  You can drill the hole at both ends with a 7/16" diameter bit in a hand drill off the lathe  to provide enough length to glue in lengths of the threaded pipe.  Another option is to chase the 3/8" hole with an electricians or bell hanger's 7/16" bit in a drill off the lathe  I have found these bits on Amazon for as little as $11 plus shipping.

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