I dion't know about here in the UK, Roger, but LittleMachine Shop in California sells them, and will ship across the pond. Try this page, pick the first one and then click on Chris's Tips, where you will find a link to a chart showing the inserts and their LMS part numbers.

I suppose they will all be 60°, so no good for Whit, BA etc.

Hopefully, you will find a UK supplier.

Andy

Edited By Andyf on 20/07/2013 14:38:19

Greenwood tools used to supply HSS threading inserts, I bought a couple a number of years ago and they are still going strong. Don't know if they still supply them.

Doug

Hi Roger,

Try Protool http://www.protool-ltd.co.uk I bought HSS thread inserts from them. They do pretty much any thread form you could wish for. They sell them in packs of two. Although when I bought mine I splashed out on a boxed set.

Regards

Barry

Edited By John Stevenson on 22/07/2013 11:17:58

That is a pity Greenwood don't do HSS ones anymore, although I have used carbide ones for years without too many problems, just as long as you are not too rough with them.

Doug

Roger, consider whether you want / need partial or full profile inserts, personally I use full profile ones but partial profile will allow you to cut several threads of differing pitches where as full profile are dedicated to a fixed pitch or TPI. If you use partial profile on some thread forms, e.g. Whit, Unified, you will have to truncate the thread crest to compensate for not having the crest radius.

I am not an avid fan of tipped tools for the home workshop and most of my turning is done with HSS –easy to grind to shape and good stock removal at the speeds and feeds we can use on lighter machines. I do use some tipped tools for certain applications one being threading which I do a lot of, even so sometimes I grind up HSS for an odd job.

Hope this helps John

Also all unified threads UNF UNC etc — I've cut 1000's of them before the advent of tipped full form tools, all were truncated. An easy one I still cut many of is 1/2 UNF truncation 0.006" to 0.008" is standard.

Thread chaser, well yes you can but its easier just to truncate the thread and cut out another operation and the need to have a chaser for every thread size you might want to cut.

John