Homebrew PCBs

In a message dated 12/12/2005 3:51:25 P.M. Central Standard Time,  
lcdpublishing@... writes:

The  drilling depth (stroke) required for PCBs is less than 1/4" which is 
fine for  a pivoting press as long as the 
pivot point is back a bit from the tool  center line.<<
Yes, but what IS the distance between the pivot-axis and the  drill-axis?  30 
cm?  More?  Anyone "in here" have a source for  fine 400 Hz "capacitor-run" 
or three-phase "aircraft instrument" motors that  spin @ 24,000 RPM?  I found 
one years back at a "junk shop" that was only  12,000 RPM, but it does PCB 
drilling fine.  Hadda build my OWN 400 Hz  source.  Hassle!  But no motor-brushes, 
sparks, "buzz",  etc.         Jan Rowland 

 


[Non-text portions of this message have been removed]