drill bit question

[nrscroller]

HI all

My FD Puzzle blades say I need to use a #71 wire bit. I did that, in my dremel plunge router and the blade will not go through the hole. Somebody is wrong. Why do they say to use a number 71 when it won't work? that is what it says on the FD chart for that blade I dropped to a 68 and it went thru fine.

Interesting fact I thought I would point out.

Bill

[LarryEA]

Call Mike at the Flying Dutchman and ask him. He should be able to answer that.

[dansnow]

A quick check online shows that a #71 drill bit is .026" dia. A #2 FD puzzle blade is .015, while a #3 is .031 so iin that case would not fit in the hole.

 

Another thing is check the drill bit. I have found that in some of the less expensive drill sets the marked dia is more of a suggestion than the actual dimension of the drill.

[Multifasited]

I am lazy ,and loose charts ,so for 10 Bucks a hf on sale I got D. calipers ,and go by that ,never been wrong yet Handy for all kind of things ,I keep one pair in both shops , Being an old fieldservice engr. never saw a print or a chart  that was totally Accurate ,and rebuilt kits ,seldom complete and  usually wrong (oh!  You have one of those!) (Oh! Yeah !! I see your notation now !!) Well it's friday I can't get any thing shipped till monday ,if we have all the parts ! So I quickly learned  trust but verify ,CYA !! 

[ike]

I check all my drill bits with a Electronic Caliper I got from Harbor Freight for $10 and they are off by .0005. When using ply wood I have to drill the 2nd time from the back so the Blade won't hang up. It's matching the Blade with the Drill bit.

 

IKE

[Multifasited]

Sounds like your splintering the ply wood as your drilling fragments are sticking out into the hole area and the second pass cleans them out not all ply wood comes from the same family or the same type wood ,or made and glued the same ,thats the only thing I can think of causing the problem !