Aram, Since you are only talking about cutting wood and plastic a standard ball bearing would probably work. Angular thrust bearings are hard to find in sizes smaller than 10mm Id. The best way would be to support the leadscrew with 2 bearings, 1 on each end and not a floating leadscrew with 1 bearing and the motor on the other end. The preload would help any axial play. I would be more concerned with a 30" (+) x 3/8" leadscrew whipping about. Bigger diameter would be better for both your X and Y axes.
Chris [EMAIL PROTECTED] wrote: > Hello > I want to build a small cnc demo machine that design only to demonstrate > how axis move and not to make steel chip –maybe plastic or wood chip. > I want to use 3/8 lead screw. In X travel 30 inch, Y travel 25 inch, Z > travel 12inch. > Here is place that makes screws > http://www.hsi-inc.com/lead_screws_and_nuts.php > Unfortunately they do not make trust bearing that should hold end of the > lead screw. So I am looking to buy stage –trust bearing that will hold end > of lead screw and absorb axial load force from lead screw? > Servo motor should not have any axial pressure from screw so all axial > force should be absorbed by trust bearing that I need to find. > So I need help in finding those trust bearing that should hold lead screw. > I check http://www.mcmaster.com/ and many similar places but no luck. > Because it is demo machine linear bearing will be from Home Depot. > Thank you, > Aram > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
