|Mick B1||16/06/2019 19:22:56|
|1069 forum posts|
Presumably it's not just rake you'd need when cutting, but a helluva lotta trailing side clearance to avoid rubbing on the helix angle.
I meant to ask: would have been easier to find a way to re-use the business end of the existing stirrer by joining to a new stem in some way?
Edited By Mick B1 on 16/06/2019 19:25:44
|Ian Johnson 1||16/06/2019 21:58:42|
|59 forum posts|
That turned out nice. Looks like a very aggressive square thread! And there is always more than one way to get the job done.
I tend to use tips with a good positive top rake for all my general machining these days, and apart from form tools I try to avoid grinding HSS, it's just too messy!!!. My favourite tips are these DCMT 070204 with the ground/polished finish, they will machine anything, brass, aluminium, steel etc. and are very good on plastic especially Acetal.
|Martin Hamilton 1||16/06/2019 22:24:47|
|97 forum posts||
Ian where did you get those particular dcmt inserts from if you dont mind me asking, thank you.
|Ian Johnson 1||17/06/2019 00:41:14|
|59 forum posts|
Hi Martin I get those tips from JB Cutting Tools. They usually have a stall or two at classic bike shows (Stafford), steam fairs or model engineering shows. I think you can order on-line too although I haven't tried that yet. I don't know the technical specification for the tips, but if you ask Jenny she will give you the same ones, very good quality. About £3.50 each Silver or Gold I think they are the same spec, gold is prettier though!
205 forum posts
I order regularly through their online shop.
Their website is great to navigate and the whole process very simple.
|226 forum posts|
I must admit I did not worry about clearance, The tool was quite small and had a good front clearance so it did not interfere much.
I did think about fixing the old one but;
So I decided making a new one is probably the safest. The Acetal does seem to be slightly more flexible than the old one, and I have strengthened the point that broke.
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