Re: [CAD_CAM_EDM_DRO] Re: best type of hub for pulleyts (DONT USE A KEY)

Realize that I'm talking about runout, i.e. out of center, I've had stock XL
series pulleys that were off center .050, a couple of those and you dial in your
travel dead nuts at 1.000", only to find at 1.5" you're out to lunch. Seemingly
little things can become great sources of frustration and head scratching...

erie


Quoting turbulatordude <dave_mucha@...>:

>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, erie <erie@s...> wrote:
> > just a word of advise, buy all your pulleys with undersize bores
> and
> > have a "real" old time machinist
> > rebore them for you, browning and maurey (two of the larger
> suppliers)
> > both spec .004" runout,
> > waay too much for cnc applications, and a source of cyclical error
> that
> > bites most people in the ass at least
> > once.
> >
> > erie
>
> I'm planning on using 3/8 and 1/2" shafts and would not have a
> problem it I needed to ream the bores to fit.
>
> I will use drill rod for the shafting and that can be off as much as
> you mentioned.
>
> I wouldn't be uspset if I had to make my own Browning type bushing (
> I think tha is the name) with a taper on the ID to lock in the
> bushing and shaft.
>
> Dave
>
>
>
>
>
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