Gene, without being able to read what is engraved on them drill bits: those look decent, the metal box and the price suggest they are of better quality. Just about like mine I have been using for the last 35 years: https://www.hoffmann-group.com/DE/de/hom/Monozerspanung/HSS-Bohrer/Spiralbohrer-Satz-HSS-E-Nr-114450-mit-Kassette-1-10-GARANT/p/115320 Some of them are a bit shorter now from sharpening, very few were broken and have been replaced. Never compromise on tools. Peter
Am 23.01.2016 17:53, schrieb Gene Heskett: > On Saturday 23 January 2016 06:18:55 Peter Blodow wrote: > >> Tom, the formula for drilling for metric threads is simple: nominal >> thread diameter minus the pitch, e.g. 12 - 1.5 = 10.5 mm for M12, or 6 >> - 1 = 5 mm for M6 etc. > Does that not give a 100% thread? I was under the impression we use a .85 > multiplier. I made a couple 3mm holes yesterday when carving up a > temporary camera mount, applied that rule and used a .089 # drill as the > starter hole. Had about the taps length to do as the screws I had were > 12mm long and the material was 1/2" thick. Not wanting to load up the > tap and break it since it was a crap Irwin/Hanson, I pecked it by hand > from the mdi command line, 3mm at a time. Worked great. But I need to > junk that set of drills, they are gold painted wheel weights & only good > for 3 or 4 holes in alu before the edge is gone. I had bought one of > those 115 piece things for about a $30 bill several years ago, and half > of them have burned up or broken, and most are too small to be worked > over by the original drill doctor. Its good for big bits, but has bad > centering problems when you get below about 3/16" > > Looking at the fleabay offerings, what does this group think about Drill > Hog? Like these: > > <http://www.ebay.com/itm/Drill-Hog-60-Pc-NUMBER-Drill-Bit-Set-Wire-Gauge-HI-MOLY-M7-USA-Lifetime-Warranty-/181752876465?hash=item2a5150cdb1:g:x4oAAOSwMmBVrQ3a> > > [...] > > Thanks everybody! > > We have about 14" of snow on flat areas, and its still building, perhaps > an inch/hour. A winter wonderland out, if I didn't have to clear some of > it when it finally does stop. I stuck an arm & camera out the back > door, and my rider and 20 kw standby are just tall lumps in the snow, > completely covered. > > For those of you sort of on the "right coast" with me, orders from > Grandpa Gene: don't go have a heart attack shoveling it. Ya'll hear? > > Cheers, Gene Heskett --- Diese E-Mail wurde von Avast Antivirus-Software auf Viren geprüft. http://www.avast.com ------------------------------------------------------------------------------ Site24x7 APM Insight: Get Deep Visibility into Application Performance APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month Monitor end-to-end web transactions and take corrective actions now Troubleshoot faster and improve end-user experience. Signup Now! http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
