Bolduc Block - Bit Size - Torque

[Ron Nossaman]

>But using your numbers, you are installing a 0.276-inch pin into a 
>0.042-inch hole. The size difference is 0.034 inches. If I were follow 
>this, but only using a 2/0 (0.282") pin (which I am), I would be drilling 
>a 0.248-inch diameter hole (which is what is recommended for the Bolduc 
>block. But I am getting 180 in.-lbs. with a 0.263-inch diameter bit. This 
>is what concerns me. Maybe it is silly, but I worry that for some reason 
>the torque is initially artificially high and maybe its going to drop a 
>bunch after a while (I actually realize that is unlikely, but why so high 
>torque with such a big bit?).

Come on guys, this is exactly why Mike McCoy sent us the spreadsheet with 
all that carefully and laboriously collected and compiled data on pinblock 
drilling. Terry, you're getting pretty much exactly what the chart shows 
for the 0.263 hole.