[BlueFin]

Am getting ready to bore some holes and didn't know if there was some kind of special G Code that is required for the Tormach Mach3 and a offset boring head, but then I realised that the holes are solid numbers. For example, the oil seal bore is .750" so the .753" oil seal can be pressed in. So my question is, could I just interpolate a .745" hole with a 1/2" end mill and then change to a .750" end mill that just centers over the hole and plunges straight in with a drill cycle? Will the bore be accurate and clean enough to press seals or bearing into them? I assume the Tormach will have enough power and be rigid enough, it is 6061 aluminum and the bore is only .250" deep.

Thanks, Tyson

[RTP_Burnsville]

I would think it should work assuming the mill is the correct size. A reamer would be a better choice but if you are like me there isn't likely to be a 3/4 inch reamer sitting around. I have done something similar but for 3/8 inch holes.

Why don't you try it on a scrape piece and see what the results are...

Robert

[R.DesJardin]

Yes use an end mill, I do this all the time, I use finishing contour cuts in Sprut for this. If the hole is a little off in diameter change your tool diameter info to account for this. If the hole is small change your end mill diameter for that tool to a smaller diameter, larger the opposite applies.

[BlueFin]

Thanks guys, I will give this a try when I get the stuff, don't have a good 3/4" end mill or the seal to press in, but the more I think about it I just don't see why this would not work.

Tyson

[R.DesJardin]

Any size endmill will work. I would use a 1/4" or 3/8" end mill.