I've never seen it - diamond grit is usually bonded to
metal...probably because the paper wouldn't last that long, and the
relatively high cost of the grit.
Any particular reason why it has to be diamond and not, say, silicon
carbide or carborundum paper?
I want to polish some turbine blades in a very small turbine wheel
machined form solid - the blades are about 6 mm long, 4mm deep, and 2 mm
I need something thin, in order to get into the 2 mm gaps, flexible
because the blades are curved, and hard because the wheel is made from
That's why I thought diamond sandpaper - cut it into strips, fasten the
ends into bands, and drive with a dremel or mini-belt-sander or something.
Though finishing the concave surface is going to be ... interesting! ...
-- Peter Fairbrother
flexible and does a very good job on curved surfaces - though being more of
a woodworker I use a piece of 8000 grit glued to a bit of MDF to give chisel
edges a quick touch. Turns out they do have UK distributors (see web site)
though none quotes a price. I got mine from a tutor so have never bought it
Send us a snail mail address and I'll send a sheet each (they're about A6
size) of 1, 5 and 12 micron Aluminium oxide lapping sheet (can't remember if
I've got any 30 micron). It's single sided, about 2-3 thou thick, very flat.
Think plastic shim stock with graded grains on one side.. Abrasive layer is
fairly delicate, but it will impart an optical mirror finish on things. Used
some on hardened steel last night.
If that works, ok. If it works but is short lived, then you can invest in the
much more expensive diamond stuff.
Polish first with normal wet & dry, then get a small syringe of
Pop in to the local Costa coffee or Starbucks and grab a handful of
their thin wooden coffee stirrer sticks.
Use sticks with diamond paste to polish.