On Tuesday 30 June 2015 12:33:29 Chris Radek wrote: > On Tue, Jun 30, 2015 at 10:53:58AM -0400, Tom Easterday wrote: > > Also, I believe I can do CSS but don???t really know anything > > about that yet > > Using CSS+FPR while parting bar stock makes all the difference in > the world. > > Parting at a fixed RPM is terrible. Your choices are way too fast > at the beginning or way too slow at the end, or most likely, BOTH. > If someone tells you what fixed RPM and IPM to use, thank them > politely and then ignore their advice. > > I have always used HSS parting tools and I shoot for a dead flat > grind on the end so the chip comes straight out. (Some grind it at > an angle to try to leave the pip on the bar and not the part - this > has never really worked for me.)
Me too. > > Make sure it's exactly on center height. I've usually used the time honored feeler blade method for vertical centering, with what is only so-so results. Plus the blades I have, tapered as usual, dull on the sides quicker than the tip. This requires several trips to the grinder per 1/4" of radius cut, so I wrote a wobble program to cut a wider groove, preventing the blade from being pinched in the groove. Cutting off, particularly for larger radii workpieces, I need help with, and have even finished the job by using the grove as a guide for a hacksaw, usually in reverse and using it as a pullsaw. Purty it ain't but is generally acceptable since that portion will be bored away before a 209 nipple for one of my BP rifles is finished. And I am still looking for a device to sharpen tools that I first saw in 1959 while our machinist was carving the bronze camera housings for the 2 tv cameras we put on the Trieste before it made that dive into the mohole in Feb 1960. A brass disk IRC, about 3" in diameter, spun by a phono motor at perhaps 200 rpms. It had two posts stuck up about 3" or so, one just cleared the edge of the disk, the other perhaps 3/4" on out. The guy had a tool holder that was a piece of swiss cheese, holes drilled thru it at every which angle. He could put a drop of diamond dust oil on the disk about every other day, drop the holder on the post & swing it back and forth over the face of the spinning disk at the various angles he needed, walk back over to the big Clausing and bronze peeled off like it was warm butter using plain HSS steel tooling. Looked to be handier than good toilet paper in the outhouse, but I have never seen another sharpener like it. Do we have a tool that can do a better job of centering the height than gently pinching a feeler blade and eyeballing it vertically? 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> ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
