PCD Redrilling

[insomaniac45]

Could you explain what stress points elongating the holes would make?

I do not agree with your comments about the pillar drill at all, if you centre drill first, use a correctly sharpened drill and have the job fastened down positively you will have very little to no 'wobble' or 'drift', fantastically accurate in the right hands.

With the sizing not being critical on the bolt hole I would always centre drill and then drill straight out to size, no pilot hole as they can often cause more problems. I personally wouldn't attempt this with a pistol drill.

wtf. i did a whole reply.... and its gone

But. The stress points will be created at the flat spots that are created from elongating the holes.

And yes, a pillar drill in the right hands, is a very accurate machine. But a pistol drill in the same hands as some one who knows what they are doing can be just as accurate. i do agree, every hole really needs a centre drill first, as that alone helps prevent drift. But wobble is all done to how the drill is ground. I am not knocking peoples skills in any way.

I do have to apologize for jumping the gun, as the elongations are only 4mm a side, which is not a lot at all. I do have a terrible habit of over analyzing things, and making solutions over complicated.

But, you have done it now Niall, and i am sure it will be absolutely fine.


Tony.