|Mick B1||16/06/2019 19:22:56|
|1155 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|
|124 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|
|130 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|
|124 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!
234 forum posts
I order regularly through their online shop.
Their website is great to navigate and the whole process very simple.
|272 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.
Please login to post a reply.
Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!
You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.
Click THIS LINK for full contact details.
For subscription issues please see THIS LINK.