From: muratlanne@gmail.com   
      
   "Bob La Londe"  wrote in message news:10hq1qh$281ns$1@dont-email.me...   
      
   One thing I drill a lot are holes for hinge pins in molds.  Typically I   
   drill D, then G, (F would work, but G allows for faster work and still   
   not bind) and then deburr the hole.   
      
   I was thinking if I grind a 5/16 or 3/8 with a .246 and then .260 step I   
   could drill and deburr every hole in one setup with out swapping drills.   
      
   I'm about to go swap out the diamond wheel (normally I make carbide   
   tools) for a white stone and give it a go.   
      
   Can you:   
      
   1.  Tell me what I'm about to do wrong?   
   2.  Off suggestions to make it work better next time?   
   3.  Off some guidance other than ask a tool grinding shop to make some   
   for me?   
      
   I'll stick with stub length screw machine drills of course.   
      
   Bob La Londe   
   CNC Molds N Stuff   
      
   ---------------------------   
      
   I've made drills to cut various tapers and curves but never a step drill,   
   and they usually needed a pilot hole.   
      
   Supposedly dry diamond wheels won't burn on steel below a speed variously   
   given between 3500 and 4500 SFPM. Is your grinder 3 phase?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)