1-2-3 blocks

[arvidj]

(02-01-2014, 07:30 PM)PixMan Wrote:

(02-01-2014, 07:01 PM)EdK Wrote: Curiosity got the best of me so I went and checked the two sets of 1-2-3 blocks I have. The Phase II set has unthreaded holes that almost pass a 3/8" bolt through them but not quite. The no-name set has the minor diameter bolt dimension for the unthreaded holes. I think they are just surface hardened. Would a carbide drill bit work to drill these holes out?

Ed

A carbide drill would work, though I'd advise against using hand fed quill motion to do it. Better to bring the drill close to the work with the quill, then use table (knee?) feed to drill the hole. This will prevent the drill from sucking itself in and breaking.

Carbide may work.

I do know that the blocks do an excellent job of rendering a HSS bit useless with absolutely not damage to the block. I have two to prove it. Something along the lines of "an idiot will do the same thing over and over expecting the results to change".

I also know that a cobalt drill will get about a third of the way thru one hole before it gives up the ghost. Have two of those in an effort to verify that I am an idiot.