On Wednesday 02 August 2017 01:28:41 Kirk Wallace wrote: > On 08/01/2017 08:50 PM, Jon Elson wrote: > > ...snip > > > All this work for a 1 HP compressor? > > I would think the boring bar can make a much straighter and rounder > > hole that orbiting with an end mill. Yes, it is more work to keep > > setting the cutter diameter. > > I have a soft spot for all machines especially the underdogs. > > I half expected to get replies like "I do sleeves all the time and we > started helical boring years ago and haven't looked back". > > One thing I learned the hard way is that the bore needs a few > thousandths of honing to remove the fractured surface from the boring > cut. In my youth I sent a 327 block to a reputable engine machine shop > and they only did a bore and finish hone. During the break-in the > piston rings gouged the cylinder walls (classic shiny concentric > circles) and pretty much ruined the rebuild.
I think I've seen that from insufficient ring gaps. It can rip the top plumb off the piston. 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
