THose are the first decent drawing I've seen. I made drawings from measurements. I found the flats on the nut are not parallel. They form a small (guessing) 1 degree taper
The screws are one of the few metal parts I am using for a CNC conversion. I am actually surprised that I can use 3D printed plastic parts. At first my plan was to use the printed parts for a "fit check" and then when the design was verified I'd make the part out of aluminum. But my plastic parts are working well. I am even able to print threaded blind holes that engage M4 size screws. So now the plan is to used the plastic CNC machine to make metal parts one at a time and I'll swap the in as each part is made. So I am basically hanging the head of a Harbor Freight mini mill by this SFU1605 screw and the screw is held up by some thick plastic plates On Sun, May 20, 2018 at 10:55 PM, Roland Jollivet <[email protected] > wrote: > There are many images available. > > Here is a site with such; > https://www.hobbytronics.co.za/p/943/ball-screw-and-nut-sfu1605 > > > > > On 21 May 2018 at 07:29, Chris Albertson <[email protected]> > wrote: > > > Go to eBay and search for "SFU1605" That is a 16mm diameter by 5mm > pitch > > screw. These come with nuts that had best NEVER be removed > > > > I could not find drawing of the part anyplace so I made one myself. If > > you want I have .STEP file > > > > These screws are a standard part and come of different grades. The ones > on > > eBay are the lowest grade. C0 is the best and has about 3 micrometer > error > > per meter and are used for things like making integrated circuits. These > > low-spec parts are maybe 10X worse but I don't know how to measure to > > micrometer level over a 1000 mm distance. My guess is that all the > screws > > are made on the same machine, then they inspect them for grade so a low > > spec part might be as good as a high spec part? > > > > I think there are other sizes available. I've seen 12mm diameter and > some > > larger too. > > > > On Sun, May 20, 2018 at 2:22 AM, Erik Christiansen < > > [email protected]> > > wrote: > > > > > On 19.05.18 23:25, Chris Albertson wrote: > > > > Ball screws have gotten cheap enough now that I'm putting one on a > $500 > > > > Harbor Freight mill. I paid abut $30 for a very good 16mm diameter > by > > > > 500mm long zero backlash ball screw and nut. Yes truly "zero" there > > > seem > > > > to be two ball nuts working in opposition. If there is backlash on > the > > > $30 > > > > screw it is less them by dial indicator can show. > > > > > > Chris, do you have a link or targetted search term? > > > > > > Erik > > > > > > ------------------------------------------------------------ > > > ------------------ > > > 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 > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > > > > > > -- > > > > Chris Albertson > > Redondo Beach, California > > ------------------------------------------------------------ > > ------------------ > > 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 > > [email protected] > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------ > ------------------ > 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 > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ 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 [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
