The insert designation is using the ANSI (American) system. Inserts sold here use the ISO system.

There is a very useful chart here that has both languages on it:

http://www.carbidedepot.com/formulas-insert-d.htm

With inserts, the importance of the information conveyed decreases considerably the further to the right that you read. Some of what is shown on your cutter is likely a manufacturer-specific grade of carbide.

For buying replacements, start at the left and get the basic shape. Then, for your chosen manufacturer, look at their literature and choose one of their offerings to suit the material being cut.

I may have some TPUN inserts that would possibly fit, they are a turning tip but a quick touch on a diamond wheel and they work well for milling. I will look tomorrow and if I have any I will let you know and post for the cost of posting.

When you post them to him, how will you send him the hole in the middle of the insert, that he needs for securing it? The second 'T' in his TCMT is quite important…

John.

Message sent re inserts.

Martin

John why not try to post a picture of the inserts with a ruler beside it. It may give members a better idea.

Steve.