Re: lead-screw vs common threaded rod

Hi JAck,

Seems this question got lost in the mix.

Screws some in different grades. in simple terms, sloppy to
precision.

All-thread is not a high quality threaded rod and will have an error
compounded over it's lenght as well as not be perfectly round.

This means as the nut travels down the thread, errors will compound.
It also means the nut will wear prematurly adding more errors.

Acme thread, while better in design, is available in an architechual
grade that is pure show, and has slop in areas mentioned above.

If you are trying your hand at a project, get the cheap stuff, play
and find the mistakes in your design as you go. Then when you find
you need better accuracy, you may find a few things you'd change for
the better. The retro-fit will be easier to do, you'll appreciate
spending extra bucks for the quality and post that you get what you
pay for.

But have fun as you climb that learning curve.

If you want to get more precise answers, search the archives of this
list. Yes it takes some time, but as you read the posts, you'll
gather invaluable data about other things too.

And if you want to be a real hero to this list, document your
findings and cull the pearls from the chaff and post the end all and
be all of threaded rods, and acme threads, rolled, ground, and
machine cut in the files section.

Dave








--- In CAD_CAM_EDM_DRO@y..., "jmatthews_interfold" <jmatthews@i...>
wrote:

> Greetings:
>
> In light-duty, woodworking environment - where +/- 1/128 aint too

bad

> (half way to the next notch on the best of cabinetmaker's rules) --
> what are pros/cons of EXPENSIVE lead-screw systems vs good qual
> common threaded rod for setting fences, stops, etc?
>
> New to this group, hope were on the same wave length.
>
> Jack