[HBR] HBR-13 Progress

[Whitebear1122]

When using the hand drill on the chassis I use a center punch and put a divit into the aluminum and then come in with the drill at slow speeds.  The larger the drill bit size the greater error I have.  You bring up a good point on the sharp bits though.  I'm using my ancient bits which are likely contributing to the problem.  I'll buy some new bits this week.

On my 17" x 12"x 3" chassis I put a piece of 4"x4" cedar inside the chassis to drill against, then I use some Quick Grips to hold the chassis to the bench.  Center the drill bit on the divit and drill.  

Are you able to get accurate location for large bits like 3/8" or 1/2"?  The small ones are good but I seem to get more error with the larger ones.  

73, Scott WA9WFA
On Apr 6, 2014, at 6:52 PM, Walt Hutchens <waltah at earthlink.net> wrote: