On 2008-12-31, Doug White wrote:
I got a handful of microstop countersink cages off of ebay a while back.
The ones that had cutters were all 100 degree style for aircraft rivets &
screws. I want to get a set of cutters for 82 degree screws in standard
machine screw sizes, basically #6, #8, #10 & 1/4".

The question is: what sized pilots should I get? I tyically use the
"close fit" clearance drill sizes when I make stuff:

#6 0.138" OD (close fit clearance drill is #27 = 0.144")
#8 0.164" OD (close fit clearance drill is #18 = 0.1695")
#10 0.190" OD (close fit clearance drill is #9 = 0.196")
1/4" 0.250" OD (close fit clearance drill is #F = 0.257")

There are a bunch of outfits that sell these. One that was recommended
was: http://www.californiaaircrafttool.com/21.htm

What I would suggest for you is to get ones with interchangeable
pilots, and you can make your own pilots to the size which you need at
the moment. I know that quite a few of my countersinks for the
Microstop cages do have that -- a setscrew which holds a reduced
diameter extension behind the pilot.

Enjoy,
DoN.

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