CAD CAM EDM DRO - Yahoo Group Archive

Re: boring a timing gear (update)

on 2003-01-31 07:23:52 UTC
Dave,

Friends don't let friends use xl pulleys<G>

Ballendo

htd,htD,hTD,HTD.

P.S. have you thought about making a new hub which could include a
thin larger diameter disk which could be pinned, riveted, or glued
(single shear-like)to the existing nylon web? simple lathe (or CNC
mill) job...


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude
<davemucha@j...>" <davemucha@j...> wrote:
> UPDATE,
>
> I bought a 24 tooth nylon gear (XL) with aluminum hub that was 1/4
> inch bore.
>
> I drilled it out to 3/8 and while trying to push it on the shaft,
it
> was a tight fit, not a press fit, the nylon seperated from the
> aluminum hub.
>
> I would expect that my first load on the unit would have been that
> much force so that don't work.
>
> I think I'll get a solid pulley and just use that.
>
> McMaster only lists 1/4" ID's, anybody know who offers a good price
> on 3/8 bore XL pulleys ?
>
> Dave
>
>
>
>
>
>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...>
wrote:
> >
> >
> > turbulatordude wrote:
> >
> > >I have a 24 tooth nylon timing gear that has a 1/2 dia aluminum
> hub
> > >thru the center and a 1/4 inch bore.
> > >
> > >I'd like to open it up to a 3/8 bore to fit my NEMA34 single
stack
> > >stepper to drive a 72 tooth pulley on my drill press.
> > >
> > >The setscrew is in a hub that is 0.875 inch dia so the screw
will
> > >have enought grab.
> > >
> > >I am not sure if the 0.062" wall is too thin.
> > >
> > >
> > It depends on how much of a load you are going to put on it. If
it
> will
> > be lightly loaded
> > (by the setscrew, belt torque, and belt tension) it should work.
> If you
> > will be running it hard,
> > it may swell the remaining hub and eventually cause the Nylon to
> crack.
> >
> > Jon

Discussion Thread

turbulatordude <davemucha@j... 2003-01-23 18:44:28 UTC boring a timing gear Jon Elson 2003-01-23 23:27:50 UTC Re: [CAD_CAM_EDM_DRO] boring a timing gear Bernard R <bwjarandall@c... 2003-01-24 07:08:09 UTC Re: boring a timing gear turbulatordude <davemucha@j... 2003-01-29 18:47:02 UTC Re: boring a timing gear (update) William Scalione 2003-01-29 20:35:05 UTC Re: [CAD_CAM_EDM_DRO] Re: boring a timing gear (update) Chris Baugher 2003-01-29 21:57:02 UTC Re: [CAD_CAM_EDM_DRO] Re: boring a timing gear (update) ballendo <ballendo@y... 2003-01-31 07:23:52 UTC Re: boring a timing gear (update) Mike Gann 2003-01-31 18:48:14 UTC Re: [CAD_CAM_EDM_DRO] Re: boring a timing gear (update) ballendo <ballendo@y... 2003-02-02 12:02:57 UTC Re: boring a timing gear (update)