A milling cutter I couldn't resist

I saw this on the auction site and as the price was right, I couldn't resist it. It is an integral shank two flute 50mm NOS Maydown with 22 inserts included. They are an old style triangular shape which will give me 33 changes of edge. There was only one deciding reason to get it, the extremely low profile. From the large end of the taper to the tip of the inserts is only 36mm, none of the shell mills can get anywhere near that. I used to have a quantity of those inserts, but used them all up screwing them to handles for scrapers.

I'd be interested in the results!

Cheers

Jon

I had a couple similar on No2 MT with triangular inserts 9mm and 6mm across a side.

Presumably TPKN or TPUN (no idea what the difference is). I have searched the usual outlets but have not been able to find any replacement inserts at those small sizes. Had thought of trying a TCMT in their place, but I suspect they would break because of the hole, if used for milling.

Pity because they were very simple to use cutters and good for chewing out metal at maximum RPM on the mill. Finish was adequate for most jobs.

The inserts are for aluminium, TPHW 2204 right handed. They use a 4.5mm screw. Not interchangable with the standard TPKN or TPUN. They have a corner slightly chamfered. They measure 20mm and 4.8mm thick.

Edited By old mart on 16/11/2020 18:42:04