Help with drill-Mill conversion

[Lee Roberts]

Hi Ross, looking good mate !

I'v had a look and yes all your pics had gone to the mod que, thats now been turned off and your pics will go strate into the pub gallery as soon as you upload them. You did me a favor telling me you had this problem as i didnt know that was happning for standard members so thanks for letting me know.

Look forward to seeing your machine come to life !

[Ross77]

Phew! Thanks Lee I thought it was me being stupid, can i delete the duplicate?

Did I see one of Bungalowdogs ballscrews there? What diameter is the splined end of the quill...and what taper is it?

Kip
Dam you have good eye sight, it is a bungalowdog ballscrew, bought it before I saw the coments on here about how usless it might be, Shed load of backlash in the reduction gears, need to isolate the ballscrew to check that, but it dosnt look up to much.

The quill is a morse 2 taper and the spline is 14.75mm outside dia. and an effective dia. of 11.25mm minus the splines and would require a 225mm long drill bit. The collet chucks have an M10 thread so would need sleeving I presume.

Im a little concerned about the quality of the internal taper on the quill so was wondering if I could cut the end off and put an M10 thread on that and screw it in to 20mm straight shank holder? or will I have allignment problems and is it likely to shear off under load?

Cheers

[Ross77]

cheers KIP, I understand the comment about ditching this project and just buying a proper mill, but not only do I need this to make the bits for the VMC but I think the learning curve will be usefull and give me a chance to use a CNC machine.

I always thought that the hard bit was building the machine! but from what i read there is quite a skill to using it properly! zeroing, feeds and speeds etc.

It hasnt cost much so if I reck the bed or Its goes in to self destruct because I didnt set it up properly them it wont mater.

Out of interest what would be the biggest size hole for the centre of the quill? Maybe I can get it done locally. The other option is to forget the collet chuck and just use it for accurate drilling