From: none@none.com99   
      
   On 10/17/2024 4:53 AM, Jim Wilkins wrote:   
   > "Snag"  wrote in message news:veq34c$2khi8$1@dont-email.me...   
   >   
   > On 10/16/2024 10:37 PM, Jim Wilkins wrote:   
   >> "Snag"  wrote in message news:vepqs0$2jh1r$1@dont-email.me...   
   >>    I'm happy if both flutes actually cut on a freehand grind . My DD   
   >> only has a collet for up to 1/2" so ...   
   >> Snag   
   >> -----------------------------------   
   >> I bought a separate DD 3/4" chuck which works in my 1/2" DD.   
   >   
   > I considered it but I only have like 4 bits over 1/2" that I use and   
   > those not all that often .   
   > Snag   
   >   
   > ------------------------------------   
   >   
   > My larger bits are mostly S&D with 1/2" shanks, so I made a 5C collet   
   > tightening cap with a 1/2" alignment bushing to surface grind them in   
   > the end mill fixture. I haven't yet dulled a bit larger than the 3/4"   
   > the DD will accept to test it. Perhaps making it was good insurance I   
   > wouldn't need to use it.   
   >   
   > The cap and its spanner wrench were small enough for the goodie bag I   
   > took to job interviews to show I have mechanical as well as electronic   
   > skills, which helped get me into Segway. Being able to design and   
   > machine what I wanted saved me from having to beg a mechanical   
   > engineer's assistance and accept their idea of what the mainly   
   > electronic problem required, they would make the often correct   
   > assumption that an electronic tech knew nothing of mechanical design.   
   > Mitre and Segway let me charge for time in my home shop.   
   >   
      
   I've got a couple inexpensive S&D sets.  One of the most useful was a   
   stubby set I bought from Enco before they were assimilated by the BORG.   
   The cheap sets are fine.  Especially since I can fairly easily resharpen   
   them myself.  I've also gone out of my way to find a few common sizes   
   with Morse Taper shanks for faster tool changes on the Precision Mathews   
   lathe.  I've got a few common stock parts I make routinely in small   
   batches and quick tool changes makes a big difference.  Between collet   
   chucks, jacobs style chucks, and MT shank drills I have all the tools   
   ready to go for three different common batch jobs.  Which reminds me.  I   
   should make another batch of "bolt action" pens that use the Space Pen   
   (tm) cartridges again.   
      
   You know the original bolt action pen project was what convinced me I   
   could do a decent job of sharpening drills.  I had a metric drill out of   
   a set from Precision Twist Drill that lasted for about 1-1/2 pens and I   
   was up against my time table to get the pens done before the Christmas   
   holiday.  I was pretty peeved that a more expensive brand died so   
   quickly, but I put it off to being stainless.  I figured it was ruined   
   anyway, so I'd try to free hand it.  My simple three facet grind cut   
   better than the factory grind and lasted for the next dozen (give or   
   take) pens and went back in the case still sharp enough to do a few more.   
      
   Circular thinking...   
      
   You know what I really should do is get to work on the turret lathe so I   
   can crank out those types of parts even faster.   
      
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
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