On Thu, 2013-08-15 at 09:35 -0400, Dave wrote: > >>Would it be better to just drop the 50% part of the G code calculator > and let the savvy look up their hole sizes in MH and just focus on the G > code? > > << > > No! I'm not that savvy... :-) > > Besides that takes more time.. > > Dave
In general I just take the easy approach and look on my wall chart which assumes 75% thread. If it is non-critical I may go up in hole size 1 or two numbers ( assuming # drills ;-)) If you really have to ream you are probably using forming taps which in the appropriate material really do a nice job. I only worry about the depth vs dia when tapping large holes, eg. .75" and above. Just my low energy (brain) approach to the whole thing. Dave > > > On 8/15/2013 7:44 AM, John Thornton wrote: > > According to the MH holes for tapping have a range depending on depth of > > thread engagement. > > For Class 1A and 2A they are: up to 1/3D, 1/3D to 2/3D, 2/3D to 1 1/2D, > > 1 1/2D to 3D. The range covers about 60% to 80% thread depth. > > > > Would it be better to just drop the 50% part of the G code calculator > > and let the savvy look up their hole sizes in MH and just focus on the G > > code? > > > > I'm adding spot drill for Rob and now reaming seems to be something to > > add... so far using this is faster than using my $$$$ CAM software for > > drilling and tapping holes :) > > > > JT > > > > > > On 8/14/2013 5:34 AM, Marius Liebenberg wrote: > > > >> JT > >> What is the correct way to calculate the drill sizes please. I will do > >> the metric table but I just need to know what is the right way. > >> > >> > >> > > > > ------------------------------------------------------------------------------ > > Get 100% visibility into Java/.NET code with AppDynamics Lite! > > It's a free troubleshooting tool designed for production. > > Get down to code-level detail for bottlenecks, with<2% overhead. > > Download for free and get started troubleshooting in minutes. > > http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk > > _______________________________________________ > > Emc-users mailing list > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > ------------------------------------------------------------------------------ > Get 100% visibility into Java/.NET code with AppDynamics Lite! > It's a free troubleshooting tool designed for production. > Get down to code-level detail for bottlenecks, with <2% overhead. > Download for free and get started troubleshooting in minutes. > http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Get 100% visibility into Java/.NET code with AppDynamics Lite! It's a free troubleshooting tool designed for production. Get down to code-level detail for bottlenecks, with <2% overhead. Download for free and get started troubleshooting in minutes. http://pubads.g.doubleclick.net/gampad/clk?id=48897031&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
