Greetings all; Trying to hold a 10" diamond saw blade yesterday, tight enough to keep it from slipping, I striped out the 6mm threads in my arbor.
So today I bored it gently out to around .230" or 15/64's and re-tapped that to 7mm x1.0. It wasn't until I was cleaning that up that I realized I had not seen any 7mm x1.0 screws on my side of the planet. So I assume that I may as well redo it for an 8mm screw tomorrow. But that will be loads of fun because with the 7mm tap in the chuck, I had to keep asking for a smaller peck per stroke because even in low gear, and the current limit in Jon's servo amp set to limit at about 15 amps, 150% drive for that motors nameplate, I was raising the divider that determined the additional stroke per peck until it was taking at least 7 or 8 pecks to tap one additional mm deeper. Combine that with the tap I was using have a longer that normal nose taper, I hit the bottom of the hole and that locked the spindle so I'm standing there, noting the spindle had stopped and jon's servo amp was singing as it overload regulated. Stopped lcnc, loosened the chuck to release the tap, ran the head up 6" or so, and unscrewed the tap from the hole. Threads look great, but I suspect there is not a 7mm cap screw about in these here parts. Pure unobtainium comes to mind for the alloy. :) So, just out of curiosity, are 7mm bolts really that hard to find, or am I looking in the wrong local stores? NAPA perhaps? Pricy there though. Seems metric in the label makes them an additional $2 a bolt or nut. Been there, done that. Should have gotten a free t-shirt for the price I paid for a 6 pack of 8mm self lockers. Bah. Home Depot, up in Bridgeport, 26 miles up the Super-Pot-Hole, aka I-79 has the best stock ATM, but I cannot recall seeing any 7's. 8's I can probably get locally at Tractor Supply. In a decent alloy even. I also think my 8mm tap is a lot sharper than the black oxide finished 7mm is, so maybe I can get by driving it with the mill. We'll find out tommorrow. Thanks everybody. 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> ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! https://ad.doubleclick.net/ddm/clk/302982198;130105516;z _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
