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| srm_92000:
Thanks for the comments all. Don't you just love it when presents drop throught the door.... :) This just arrived. Pictured next to its normal size brother. I decided to go for the RZ7C it has a slightly longer reach as my head is going to be a bit thicker (probably the beer again :hammer:) I like the idea of a few more threads in the ally than the CM6 it's still M10x1.0 Any thoughts on gap size guys. Standard is 0.7mm, do we go with that or tweak it a bit. Cheers, Steve. |
| srm_92000:
I thought I was making progress again today- Got the new bar so I could get going on the bore. I know theres a lot hanging out the tool-post but all went well. No chatter and tested a spring cut when nearly to size and it only took .03mm off the diameter, not bad I thought. Then I took the final cut. I'd left .18 mm from the final dimension of 25.40. That was supposed to be .1 cut + .03 spring + leave .05 under for Lapping/Honing. then I saw the finish after just the cut. :( I measured and it was to size !!!! nothing left to take off :scratch: Picture shown after a light rub with emery paper so looks actually loads worse than it is but still very dissapointing. The new tool has a slightly different looking tip to my old one. New on the bottom- If you look closely at the bottom one on the pic you can see where the coating has chipped off, this happened after the first cut as though it were just paint, the tip beneath looked, and still looks fine. I realise these generic tips are not probably the correct grade for cast, or being used anywhere near the right speed & feed, but I'm sure the old ones worked much better when I did the castings for my 10V. Ho hum, maybe better luck tommorow. Steve. |
| lordedmond:
that tip look chipped to me a pic with it facing would tell Stuart |
| srm_92000:
Hi Stuart, Yes it looks chipped, I'm trying to get a better close up picture but both my cameras aren't quite up to it. I think I need to make an adaptor to hold an additional lens in front for real close close-ups :proj: I looked under a microscope and it really does just look like the paint! :scratch: has come off, this was after the first cut and it looks exactly the same now after boring from 13-25.4mm with no wear or chipping of the edge beneath. Must try it on some steel to confirm condition. I've lapped the bore some and I think I was worrying unduly as its come up ok after adding just .05mm to the diameter. So I'll get on with the rest and see how it goes. Cheers Steve. |
| srm_92000:
Hello again, I've started on the head block now using a large block of ally that I bought a few years ago, not sure why :loco: Hacksawed a chunk off the end and prepared to mill square but had a bit of a mishap. I decide to check all the alignment of my mill first. It was a bit out so shimmed the column mount a bit more (Already did it fairly close when I first bought it.) Things looked fine but a final tighten and the thread for one of the bolts in the cast base stripped :( The bolts are really not long enough, M8 with only five threads in the cast, so had to drill and tap the base deeper for a long stud, others are temporarily still using the old bolts without the thick washers supplied as I only had one M8 nut. So on to the work- My little X0 coped amazingly well, taking it steady with just 0.5mm cuts at about 400 rpm. I had to take off about 9mm ! Wish I had room & finances for a power saw. Here's some of the designs for the head block done with 123D. Thanks for looking. Steve. |
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