RE: [CAD_CAM_EDM_DRO] Ballscrews/linear drive

Least expensive source for ball screws that I know of is McMaster Carr and
the infamous 5/8" screws. They are actually made for linear motion
applications just like this and not machine tools.

Tim
[Denver, CO]

> I know this isn't directly connected with the primary purpose of this
> group, but I don't know where else to ask this:
>
> I have been commissioned to build an automatic sliding door. It is a
> very custom design, that is why the client isn't just buying a standard
> off the shelf door.
>
> I'm figuring using a Ballscrew would fit the requirements, with direct
> drive from a servomotor. I can't use an Acme thread as I want to have
> the option of being able to force the door open if power goes out.
>
> I don't care if the ballscrew and nut are used and aren't accurate or if
> they have lots of backlash. As long as they aren't so worn as to cause
> problems like sticking.
>
> I need two of them, this will be a two piece door. Does anyone here have
> used ballscrews/nuts fitting this description, or know where I might
> look for this? Trying to save a bit of cash without compromising the
> integrity, obviously this isn't a need for high accuracy.
>
> The other option I'm considering is something I found in the Small Parts
> Inc. catalog. I can't locate my catalog to get the name of it, but it
> sort of "climbs" a smooth rod as though it were a ballscrew. Anyone know
> what I'm talking about?
>
> Any help is appreciated. Especially names of suppliers in the
> Tacoma/Seattle area, places that don't have a "3 question limit". :')
>
> Thanks,
> Steve Greenfield
>
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