scored another Ebay gun drill

whammo57

whammo57

Kim Walker
Silver Member
I bought a 53 inch long .7500 gun drill. I cut it in half and made an adapter. The adapter has a 1/2 inch shank and a 3/4 in hole. It is attached to the drill shank with a 1/4-20 set screw and has an air fitting installed in it. It is simply sealed up with 5 minute epoxy..

It cost $20.................

Kim



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Kim, that's very creative! But I think I remember KJ once saying that if the drill wasn't ground for wood, it would perform poorly. I assume he was referring to front and side clearance of the cutter head. I know you don't miss much, so you must believe , or know, it will work properly? Thanks and, again, cool job!
 
shankster8 said:
Kim, that's very creative! But I think I remember KJ once saying that if the drill wasn't ground for wood, it would perform poorly. I assume he was referring to front and side clearance of the cutter head. I know you don't miss much, so you must believe , or know, it will work properly? Thanks and, again, cool job!
Click to expand...

One shaped for wood may cut better or smoother... I don't know........... All the gun drills I use are for metal and I have never noticed any problem. They all make a perfect hole and are accurate from end to end of the cut..............

Kim
 
I have done some modifications on gun drills off ebay and What I've found is any chatter or missalignment can break the epoxy bond quicker than anyone can say 'oh sh$t'. I now make a adaptor out of steel rod and insert it inside the drill body and then drill a small hole all the way thru both pieces and insert a pin thru them so it's pinned and glued. I must say though, I've never cut a drill into two pieces like that and used the front end.
Dave
 
shankster8 said:
Kim, that's very creative! But I think I remember KJ once saying that if the drill wasn't ground for wood, it would perform poorly. I assume he was referring to front and side clearance of the cutter head. I know you don't miss much, so you must believe , or know, it will work properly? Thanks and, again, cool job!
Click to expand...

Some are flat nosed and need a smaller hole already in the wood for them to work. Others have a point that can actually bore into solid wood with no predrilling. These are the better ones as it involves less work.
DAve
 
Dave38 said:
Some are flat nosed and need a smaller hole already in the wood for them to work. Others have a point that can actually bore into solid wood with no predrilling. These are the better ones as it involves less work.
DAve
Click to expand...

Dave you are right....... some gun drills have the coolant/air hole dead center and will not cut with out a pilot hole...........



Kim
 
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