Has anyone got a good link to how the cutters are made?
If You've been around and worked any general or "job shop" machine shops
and a few screw machines and punch presses,
the rest of the chain is pretty self evident as to it's fabrication.
some of the cutters have a thicker area inside the corner where top of the cutter
meets the side.
the tighter radious (corner to most folks ) on the outside
compared to the larger one on the inside , seems a bit reminiscent of a piece of angle iron.
that makes me wonder if the cutters are from a rolled form like angle or channel iron
and then punched/stamped off of that stock then on to the hole punching
and grinding steps.
whereas some cutters are of a consistent thickness throughout the part
and look like a stamping from perhaps coil stock.
But i realize that stampnig could form that thicker corner and dual radius.
Just a matter of die shapes and press tonnage.
http://www.treecaretrainingservices.co.uk/images/CutterProfiles_000.jpg
In this illustration the 1st and 2nd profiles from the right are of a different thickness
in the corners of the cutting areas.
You can see a tapered thickness in the top plate of the 1st one.
the 4th or left one has more pronounced taper too
the second and third one has a definite look of being pressed.
The inside corner is tight and the outside has that sweeping curve.
They all depict some taper in the top plate but the difference between
the first and third ones is pretty big.
and forgive my lack of stamping vernacular, I had very limited time actually around the presses
and shears.
just small job shop things or maybe a brief spell of helping the REAL brake operator handle a few large sheets.
plus it's been over twenty years since.
