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| Most ambitious milling project so far... |
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| John Hill:
Most ambitious milling project so far:- flywheel by aardvark_akubra, on Flickr A simply flywheel gnawed out of a scrap of 20mm plate. |
| Stilldrillin:
Nicely done John! :clap: :clap: :thumbup: David D |
| John Hill:
Thanks David. To be truthful it is not really very neat when looked at closely. I am still coming to grips with this whole matter of milling. :scratch: For example I used a 6mm slot drill (i.e. two flutes) and I found something was no 'right' when trying to slot the 5mm or so thickness of the wheel. The slot drill went through it easy enough but when I applied feed to cut the full depth in one go it seemed very reluctant so I wound up taking cuts of about .75mm, that did the trick but to my mind most of the tool was not being used and all the wear was on the very end of the tool. Surely the tool should have been able to cut that in one go? |
| Stilldrillin:
John. I also, am coming to grips with "our" type of milling. After a lifetime of grown up milling........ Your 6mm slot drill should be ok (happy), at 2mm depth of cuts. Dependent on rigidity of set up, and type of material to be cut. With my mini mill and r/t. I would have slot drilled 5mm dia, in the corners. Then milled around with a 6mm endmill, at 3mm depth/ pass. If it seemed happy....... No traditional milling cutter can (sensibly) cut full flute depth. Except in a gentle facing situation. Hope this makes sense. David D |
| sbwhart:
Nice work John As Dave said with our light machines you have to take things more steady, the trick is to be let your machine tell you what its comfortable with, if it seems to be strugling reduce the cut until it seems happy. Drill the corners first with a roughing drill thats just a touch smaller than the cutter, also helps to get a neater job. Stew |
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