What do the guts of the lower tool mount look like ? What’s under the spanner nut ? What’s in there? Thanks
Post your question over on All Metal Shaping. Post it under Reciprocating Machines. Many experts over there. https://www.allmetalshaping.com/index.php?s=494ec1c553940c674e208dd0398d5c09
I tried registering there and it said my Email was invalid. I get that more often than I like. My email certainly is valid though
Mine looks like the one on the right. Under the big nut there is basically a wedge that puts even pressure on all 4 sides of the lower tool, so it stays centered even if you tighten it.
Try sending a message to the moderator(s). I have a gmail address and have been a member for years. AOL addresses are flagged as spam by most forums. Gmail seems to be following suit.
Those are for tool holders in a CNC mill. Most collets are hard. If you can find the holder like a 5c block and a local shop with a wite EDM, you could have what ever sized square you want burned into them.