| Gallery, Projects and General > How do I?? |
| offset holes |
| (1/3) > >> |
| daz:
I have so many questions it's unbelievable, I'll try not to flood you with them all at once. I think the answer to this one is obvious. I need to make a large hole in a piece of aluminium (1 1/8" dia). But it is offcentre and has to be exact. I only have a 3 jaw chuck, but I also have a milling machine. Is there a way to do this on the mill (non CNC) or am I better of buying a 4 jaw chuck and using a boring bar? I might be able to get work to stump up for the chuck if I can find a way of justifying it, but if not what are your suggestions? I hope this doesn't sound really stupid I don't think my picture came out right? daz |
| Jasonb:
To do it on the mill you would need to start with various size drills and when you don't have any larger change to a boring head, this holds a cutting tool that you can adjust the radius of so you just keep winding on a cut until it gets to the size hole you want. Something like this A 4jaw is probably more useful than a boring head but the head will allow you to put holes into material that is too large to swing in teh lathe. If you have a faceplate for the lathe the work can easily be clamped to that and a boring bar used. J |
| daz:
:doh: :doh: :doh: Me stupid I should have tried google a little more. I could get a boring head for the mill, probably cheaper than buying a decent 4 jaw independant chuck? I had a late night last night and my brain isn't in gear yet daz |
| Bernd:
J, I was just looking at the way your holding the part. Neat idea if the vise won't hold it. :thumbup: @daz, I'd use a faceplate to do the hole. Much cheaper than a boring head. This is of course if you have a faceplate for your lathe. Bernd |
| Jasonb:
Yes the left hand angle plate was clocked true and not moved but the casting could be rotated so keeping a ref face to work on all 4 sides. I could not put a bolt right through teh middle as I'm actually set up to bore a concentric hole on the bottom of the casting Daz of the two options I'd go with a 4 jaw as you will get more use out of it. J |
| Navigation |
| Message Index |
| Next page |