I haven't been following this thread too closely but why not use thread forming taps? They work great in ductile materials such as aluminum and there is no problem with chip clearing since there are no chips. Just be sure that you drill the right size hole according to the tap manufacturer's material (somewhat larger hole than for a normal tap).
On the idea that without a picture it didn't happen, see https://www.youtube.com/watch?v=_DmvkC3tOQw -----Original Message----- From: John Dammeyer <jo...@autoartisans.com> Sent: July 10, 2021 3:08 PM To: 'Enhanced Machine Controller (EMC)' <emc-users@lists.sourceforge.net> Subject: Re: [Emc-users] Runaway PID spindle. Thanks. I've got some really cheap metric ones coming from amazon. Just for aluminium castings and to play with. John > -----Original Message----- > From: Dave Cole [mailto:linuxcncro...@gmail.com] > Sent: July-10-21 10:39 AM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Runaway PID spindle. > > I think that is a spiral point tap. > The flute is straight along the length of the tap then the flute is is > ground deeper toward the backside of the cutting edge. > > AutomationDirect.com sells some really nice taps for reasonable amounts. > > Dave > > > On 7/9/2021 8:32 PM, John Dammeyer wrote: > > The saying we have on another group is if there aren't pictures it > > didn't happen. I hand held the camera so depth of field is out a > little on the 10-32 screw head and the macro lens is bad for depth of field as it is. > > > > Short G-Code 200 RPM tapping into really soft aluminium trimmed off > > an old box or something. Not sure if this classifies as a spiral > tip tap but even a forming tap would have pushing this soft metal around. > > > > http://www.autoartisans.com/mill/SpindleControl/Tapping10-32.jpg > > > > John Dammeyer > > > > > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
