On Friday, January 16, 2015 08:51:35 AM EBo did opine And Gene did reply: > On Jan 15 2015 8:50 PM, Jon Elson wrote: > > On 01/15/2015 12:06 PM, EBo wrote: > >> I have an old Van Norman <http://en.wikipedia.org/wiki/Van_Norman> > >> back > >> in New Mexico. I still have plans to retrofit it *some day*. Now > >> I would *love* to find someone who chould tutor me on rescraping > >> the ways... > > > > Well, it isn't that difficult to understand the concept, but > > it is brutally physical > > work and VERY slow! You need a few tools that are pretty > > special to the purpose. > > Michael Morgan used to sell castings to make a straightedge, > > and I bought one > > and scraped it in on a granite surface plate. I then made > > some right-angle > > pieces, also. You can get an Anderson Bros. scraper and a > > few scraping blades. > > I made my own blades from large carbide inserts, and ground > > them on > > a diamond wheel. Instead of the old timer's Prussian blue > > dye, I use Canode, > > which is water soluble. It is not as good as the Prussian > > blue, but a LOT easier > > to get off you and your clothes. You need to make angle > > gauges that are a fit > > to the dovetails to make sure you maintain the correct > > angle. You also need > > to make some traveling gauge mounts to assure the dovetails > > remain parallel > > to each other. There are a couple ways to do this, even a > > pair of hardened > > and ground shafts can be used. > > Jon, > > With your reply as inspiration I reached out to the global-brain > (google) and found a couple of video's. I see most of of how it is > done now. Later, in my copious spare time, I will look more into the > various techniques I have seen and maybe ask for people to kabitz if > I ever decide to take this project up. As a note, I have access to a > shop which might have suitable surface blocks (and maybe even > straight-edge or two). I would still like to learn more about some > of the different touch-off techniques, but it will be a year or 6 > before I even think of doing this for realzies... > > Thanks again, > > EBo --
There is one video avaiable on the web, where the guy took a Rong Fu RF-45 apart and lapped the ways (all 3 of then), I assume with some valve grinding compound. Left em rough so they'll hold oil. That too I'd assume is fairly physical. He also cut a serpentine groove in the bearing faces to distribute the way oil that came in thru holes he had drilled, and presumably fed from a 50 dollar one shot pump. Claimed it was as smooth as butter when cleaned up even with the gibs driven tight. I don't recall if that was the same guy that had to tear down the gearbox driving the spindle after about 20 hours run-time because the bearings were run out. Turns out the oil in it when it shipped was loaded with casting sand! The castings were finish machined and assembled without ever seeing a steam cleaner wand. The poor reputation may be why Grizzly is moving their copies out at circa $2500 when the MSRP is $3500 & up. He cleaned it up, replaced all the bearings including the spindle bearings and claims it runs quieter wide open after several hundred hours than it did when right out of the crate at 90 rpms. > ---------------------------------------------------------------------- > -------- New Year. New Location. New Benefits. New Data Center in > Ashburn, VA. GigeNET is offering a free month of service with a new > server in Ashburn. Choose from 2 high performing configs, both with > 100TB of bandwidth. Higher redundancy.Lower latency.Increased > capacity.Completely compliant. http://p.sf.net/sfu/gigenet > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers 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> US V Castleman, SCOTUS, Mar 2014 is grounds for Impeaching SCOTUS ------------------------------------------------------------------------------ New Year. New Location. New Benefits. New Data Center in Ashburn, VA. GigeNET is offering a free month of service with a new server in Ashburn. Choose from 2 high performing configs, both with 100TB of bandwidth. Higher redundancy.Lower latency.Increased capacity.Completely compliant. http://p.sf.net/sfu/gigenet _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
