re:Re: Lead screws for ever...(copper)

Chris,

Copper VERY quickly work hardens... I'll bet most of us have used
this property when the wire cutters weren't available. :-)

Ballendo

P.S. Thank you for the drawing of what I have been calling my "faked
plain radial bearing fixed mount". The "copper" washer is where
the "shim" washers go...

>Just reading through some e-mail from Scott (The guy who used my
>design...) he's replaced the copper washer with a slightly oversize
>(machined?) ptfe washer, and just did everything up tight. He
>figured that the ptfe would apply some "sprung" preload to the
>bearings. The interaction between the faceplates and the screw nut
>were annoying him... I would have thought that the annealed copper
>would give enough "spring" but apparently not...
>Cheers, Chris.