Threading V grooving tool needed

[howser37]

I am having trouble finding a bit i need for a job , i need to cut some internal threads so i am after basically a v grooving bit but with the cutting edge facing outwards.

this is similar to what i am after

V Groove Bit

I have found a 1/2 " shank bit on ebay but was after something a bit smaller, i am not looking to spend a lot as its only a one off job

Anyone ever purchased a a bit like this before or know where to get one?

regards
Adam

[komatias]

Hi Adam

You are looking for a thread mill.

I have bought a number from http://www.drill-service.co.uk/ WNT and others but they are not cheap.

Do you know what size and type of thread you need to cut? I may have one brand new that I am not going to be using any time soon but it must meet your needs

[howser37]

Hi komatias, thanks for the info, just had a look at that website and this is the kind of thing im after

Link

I should be more specific in that rather than an actual thread i want to use the bit to create rings inside a routed shape, sometimes it might be just one ring other times several, it would be nice to have the option of continuous threads but being able to just make the rings is the most important part. I could possibly use a very small keyhole cutter but it would need to be only about 2mm in depth of the cutting edge

[magicniner]

If you can't find a single groove thread mill you can buy a suitably sized thread mill and grind off all but one set of groove cutters.
In addition to thread mills I use an Iscar MGCH 06 bar with GIQR and GIQL inserts for milling grooves and some thread milling, turning internal and external grooves and some thread turning, tips are available in a range of square groove widths, metric and imperial thread angles, round tip, back-boring etc. so it's not a one-trick pony,

- Nick

EDIT - The Iscar option looks reasonably priced given the linked products, I've paid from £25 to £40 for a bar and £2.50 to £14 for tips from the ever popular auction site.

[howser37]

Thanks Nick, like you say the Iscar option looks reasonably priced considering its versatility, will definitely look into that one thanks.

[John S]

Just grind a three penny lump of High Speed Steel into whatever shape you want.
Don't over think it.