Yes but for small angles sin() and tan() are almost identical. Sin(7)=0.1219 and tan(7)=0.1228
> -----Original Message----- > From: Marcus Bowman [mailto:marcus.bow...@visible.eclipse.co.uk] > Sent: Sunday, March 26, 2017 3:53 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Making taper lock hubs > > Is the tangent of the angle not more useful? That uses the straight length > instead of the hypotenuse (along the tapered face). > Opposite over adjacent, rather than opposite over hypotenuse. > > Marcus > > > On 26 Mar 2017, at 19:48, Gene Heskett wrote: > > > Greetings everybody; > > > > As I read the machinists hand book, tapers such as this mean the > > "included" angle, not the angle of just one side of a cone. > > > > So, I've read, where I don't recall, that a taper lock hub is 7 > > degrees of taper. It doesn't self eject, but also does not need a lot > > of jacking force to unlock it. Or is that magic angle different, not 7 degrees? > > > > The sin(7)=0.121869343405147462, which I interpret as meaning if the > > tool travels an inch, the diameter change is 0.121869343405147462. > > > > But the tool is moving only .735" from one end of the taper to the > > other, so the additive value for the big end of the taper is then > > .735*0.121869343405147462=0.0895739674027833847. Since that is better > > than angstrom accuracy, round it down to 4 or 5 digits right of the > > decimal makes sense since I'm not carving a new Hubble mirror here. > > > > So, bore is .876" (I overshot 7/8" a red one) and I'd like the taper > > hub wall to be about 1/16" thick at the small end=1.0000". Then the > > diameter at the flange, .735" to the left of that 1" point, would > > 1.08957". > > > > Correct? > > > > Thanks. I might get this taper thing understood yet. > > > > Cheers, Gene Heskett > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > ---------------------------------------------------------------------- > > -------- Check out the vibrant tech community on one of the world's > > most engaging tech sites, Slashdot.org! http://sdm.link/slashdot > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ---------------------------------------------------------------------------- -- > Check out the vibrant tech community on one of the world's most engaging > tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
