Dave Plowman (News) wrote:
In article ,
Bob Minchin wrote:
Dave Plowman (News) wrote:
For cutting a hole in plywood, what is the name of the best type of
router cutter to use?

A spiral flute up or down cutter depending on which face need to be
perfect. Down cut= good top face.
These bits tend to be best run at very high speed with steady feed as
found on CNC routers.
The bits are long lasting but expensive and intolerant of problems-
being made of solid tungsten carbide.
Depending the work and the user a single flute straight cutter might
work out better value for DIY use? These give adequate top and bottom
finish with a carbide blade supported by a tough steel shank.


Thanks Bob - just what I wanted to know. That's could be why the spiral
flute type isn't available from the likes of ToolStation?

Cutters from the sheds/Screwfix/toolsatan are Ok but only basic quality.
I've found the best combination of quality and price with next day
delivery for modest charge is Wealden http://www.wealdentool.com/
No commercial connection/satisfied long term customer etc etc
However I doubt that they will have your 3/16 shank cutters. I guess the
trick for those will be to stock up when ever aldidls are running offers
on the routers as they usually will have additional tooling offered at
the same time.
Wealden will make/obtain specials but I expect at a price and "How many
thousand would sir like?" and even then possible based on standard shank
diameters.

Also don't even think about using metalwork milling cutters, whilst they
have the up cut spiral, the clearance angles are all wrong and they burn
up very quickly in wood DAMHIKT!