On Thu, 15 Aug 2013 07:25:44 +0200, you wrote: >Now would that be a 50% or 75% thread. JT's tables needs both. One for >softer metals and the other for the harder stuff.
Metric threads are usually specified as .65H I've never seen any deviation in percentage diameter specified for softer or harder materials for drilled and tapped holes, and as most drills drill oversize anyway it's a moot point. You would just use tables or diameter - pitch. For softer or harder materials you just use the appropriate diameter/pitch faster. If you are machining threads on a lathe, it's a different story. Using the correct form inserts you can get up towards 90%, if you needed threads that close in tolerance you would be reaming or boring the holes and tables are of no value. You would use CAM or get the info from Machinery's Handbook etc. Steve Blackmore -- ------------------------------------------------------------------------------ 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
