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| Ball or Radius cutter |
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| MadNick:
Thanks Ksor, Thanks for the reminder about the skirt and I will keep my eyes open for some strips of brass. I didnt need to use a translator for your site as the pictures speak for themselves - beautifully made tool :) Nick |
| ksor:
Thx ! |
| Fergus OMore:
--- Quote from: Divided he ad on December 30, 2011, 06:56:52 PM --- Fergus, I'm aware that much is in books.... Sadly I do not own many of the books out there. Some, but not many. Hence my questions. Fair comment on the smaller lighter machinery.... I'm a mere 37 and much of it is too damn heavy now! Ralph. --- End quote --- Books? well, one of my better books is free on the net. I have Advanced Machine Tool Work by A H Smith. Bit ancient in places but a lot answers many of the questions posed here. Elsewhere, is the great Holtzapffel books on Turning and Manual Manipulation. Absolutely spell binding stuff and if you want to turn the Eiffell Tower or the Taj Mahal or lesser things- it's Holzapffel. Even more dated but I might have some fancy books- but none can keep up with this set. You sort of read them, put a modern odd bit of know-how to them and really wonder what is really new. Regards Fergus o'Dooodah |
| MadNick:
Afternoon, A quick update. I got the cutting tip mounted on the toolpost and did a few test cuts. A couple of observations - 1. Im not sure my bearing idea is adding to the tool - perhaps a taper roller would have been better suited as its designed to manage radial force. I have to ask myself why no-one else needed to use a thrust bearing in their design like I have - it feels like a lot of force is pushing the cutting tool back and up. 2. It may be to do with 1. but reading the chips tells me that something isnt quite right. Im not getting the nice curly swarf (even on ali) and it looks like the metal is being torn rather than cut. Im certain my tool height is correct and am starting to think the cutting tip isnt right for this application. Back to the drawing board. I started to get despondent and then remembered that James Dyson made something like 2000+ prototypes for his first bagless vacuum cleaner... Nick |
| Fergus OMore:
Ah, Nick, Fergus a Doo Dahl calling! I have a set of bearings in my Clarkson Radius Attachment. However, there are none in my Quorn head and none in my George Thomas ( geared) rotary table. Well, we do do thingies! So you have a pressure in a vertical mode which is fouling the pivot bearing( recall my somewhat rude remarks about these things- well, a lot of did) It's all to do with Pythagorus and 101 and another one in Euclid's Fairy Tales about angles. That's my theory, anyway. So now you get rid of these bloody awful carbide tips and make some nice sharp hss ones which have a 5 degree front edge rather than negative or at best 3 degree positive front rake. They might work I know, I know!!!! Say no more! Fergus of the Whatsits |
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