The tool can do it if you can. You need the thread diameter less double depth for comfort 16-2-2=12mm so you have 2+mm clearance up the hole (actual minor diameter is 13.84mm). The only thing to check is that they do a 2mm insert for that holder.

You could buy quite a few taps for the cost of it mind.

Edited By Pete Rimmer on 21/05/2020 06:24:59

Glanze give a minimum hole size of 13mm for that holder though only for 26mm length, with just 1mm between height and OD you should be OK.

The price of the insert is the highest I have seen. Check out APT.

Probably misunderstood what you mean, but I don't see how the tool can cut if it's the right way up and the spindle is in reverse?

Rob

Check the size of insert used and confirm it is capable of the 2mm pitch.

Last time I needed an internal M16 thread to fit a screwcut external thread I just drilled and tapped, although I did already have the taps.

Andrew

As I said there is only a 1mm increase in tool diameter from the 9mm x 26mm end to the 10mm shank so you will have clearance into the hole but as it is a fairly coarse thread you may come a croper. Can't remember if my tool is 10 or 12 mm will see if I have a chance to measure it later.

The Glanze insert is a "partial form" eg it has 60 deg angle but will not cut the exact crest and valley form, it will cut a range of pitches which you would need to check. The other are known a s"full form" and have the pitch in the description and will cut correct crests and valleys for that pitch only. So you can gave one all rounder.

Rob, sometime words just don't work and that's when the old saying kicks in, a picture is worth a thousand words.

Martin C

I did have a measure of my 10mm one but it has the 10mm shank all the way and I only have a partial form 0.5-1.5 insert so could not really give an exact answer but it did fit into a M16 nut with plenty of room to spare.

I might well do the same thing in practice but another of Joe Pie's vids demonstrates cutting a partial depth internal thread outboards i.e lathe in reverse (if you dont have a screwed on chuck) whch has the benefit here of proving the clearance on each tool entry. Also he makes the point that the first pass can be a larger depth of cut than subsequently since the actual cutting surface at that time is smallest. It also allows you to use the smallest stick-out of the tool since you don't have to worry about when to disengage the feed.

For total cowardice there's nowt wrong with a handground HSS tool and manual cranking of the lathe. It's tedious turning the chuck with two keys but do-able..

pgk