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High Speed Steel Purchases - Charity or Art?

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sparky961:

--- Quote from: Pete W. on June 01, 2017, 12:22:12 PM ---A current project involves turning a component or two from Delrin rod.  My initial attempts using my usual tools gave very unsatisfactory results

--- End quote ---

I'm a little surprised to say the least.  Delrin is my absolute favourite plastic to turn because it's one of the easiest I've found to work with.  It's more rigid than UHMW(PE), so you can clamp it with decent force.  It doesn't melt as easily as Nylon or ABS, and the chips break up very nicely unlike Nylon and UHMW(PE)

Sharp tools, absolutely.  But you really should be able to achieve acceptable results with carbide insert tooling as well.  Maybe you can post some pictures and descriptions of the issues you're having and what you've already tried.  I'm sure plenty of advice will follow.

Pete W.:
Thank you all for your replies.    :mmr:  :thumbup:   :clap:   :thumbup:   :clap: 

I'm not going to respond fully at the moment (a bit busy this morning!) but I'd like to make just one observation:

If you've read my thread 'Dicing with Delrin' you'll have seen that I got on well with the material in that case.  On the other hand, I posted an earlier thread called something like 'Beaten by the Bush' where the results were terrible!  The difference between the two is that the earlier project involved 2" diameter Delrin rod while the more recent one used 9 mm thick Delrin sheet.  I bought both lots of material from (different) eBay sellers and so I'm dependent on their identification of the materials.

I want to seek your advice on lathe tool grinding plus the do's and don'ts of grinding wheels but I think that'll be best handled in a new thread - please hold off until I start that.   

mcostello:
Those shapes are totally useful, I have around 20-30 pounds of tool bits that look like that. Some even more odd.

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