You might try cutting in something softer, nylon or maybe machinable wax. Probably wouldn't break the chip if things go wrong.
Raymond Julian Kettle River, MN The things we admire in men, kindness and generosity, openness, honesty, understanding and feeling are the concomitants of failure in our system. And those traits we detest, sharpness, greed, acquisitiveness, meanness, egotism and self-interest are the traits of success. And while men admire the quality of the first they love the produce of the second. -John Steinbeck, novelist, Nobel laureate (1902-1968) On 07/15/2016 05:05 PM, Gene Heskett wrote: > On Friday 15 July 2016 15:59:20 Gene Heskett wrote: > >> Greetings all; >> >> I bought, from a British vendor, a set of small internal and external >> single tooth tapping tools. The tooth on each looks as if it would be >> well buried cutting a 16 to 18 tpi thread to something resembling full >> depth. The internal bar has flats on 3 sides so it cannot be rotated >> in a std QC holder, but the cutting chip itself is mounted, and the >> end of the tool matches it, such that it is tipped down in front >> toward thge x axis, guessing 5 to 8 degrees. So I am wondering if the >> cutting tip needs to be adjusted a few thou above or below the >> centerline. My gut thought is to jack it up a few thou until the >> cutting edge itself is on the centerline as this will give additional >> clearance under the cutting edge in a smallish hole. >> >> Other ideas? >> >> Thanks guys, I'll go set it that way & waste a chip I guess. But I'll >> also check back in occasionally for advice. >> >> Thanks all. >> > I mounted, and checked for working clearance & found I was close to a mm > of not having enough for a full thread height retraction at the bottom > of the taper. That, and I'm not sure I have the advancement angle > correct. Not worth wasting a $30 chip to find out. So I am > contemplating mounting a diamond disk, putting a cheap small boring bar > in the chuck on my rotary, and grinding a single toother on the end of a > $3 boring bar. I have done that before, 4 or 6 years ago. Holding a > dremel by hand yet. PIMA is what that was since the carbide in those > cheap tools shatters like herculite rear windows on a hot July day in > Yuma AZ at the first hint of a chatter. > . >> Cheers, Gene Heskett > > > Cheers, Gene Heskett > ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
