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Aram, Those flange mount bearings coupled with a good anti-backlash nut will give you a tight axis. I still think that the flex in a long 3/8" leadscrew is something to consider. Chris [EMAIL PROTECTED] wrote: Hi Hi I found something closeFirst end of lead screw= need have http://www.nookindustries.com/endmount/EndMountsFlange.cfm#Capacity To hold against trust load from the lead screw. Flange-Mount double is OK. Second end of lead screw need to have simple flat to connect it with coupling to the shaft of servomotor. Coupling need have two set screws. Diameter of motor shaft 0.866 inch. What do you think? Will it work? Thank you, AramAram, 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------------------------------------------------------------------------- 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 |
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