"Tom Gardner" wrote in message
...


Screws would mean complete dissassembly to change.

I can see the upper insert being clamped with some type of over-arm, but it
looks like there's no room for any type of clamping system which sits proud
of the lower insert.

I'll assume there are other components which prevent the arm from swiveling
to a vertical position (which could clear both inserts)?


I have the inserts shown floating out of their pockets for clairity,
imagine they are seated and clamped.

I understand what you drew, but I thought I should emphasize the importance
of a good fit.


I have a similar cutter with the wire passing through a hole in in 1/2"
round carbides. They have to be but-tight to each other or the hard steel
wire forces them apart and destroys the carbides and leaves a bad burr.

I stand corrected. In sheet metal work, trim steels never touch because of
the increased tonnage and reduced life of the cutting edge.


All the wear should be on the carbides. My target is anything better than
125,000 cuts or a week.

In my experience (heavy stamping dies), anything which moves will wear.
While the inserts will no doubt show excessive wear, having a sloppy fit or
soft bearing surfaces (cam and lever arm) will probably cause premature
failure and rework. Of course, I've never worked with wire...

Regards,

Robin