Re: [CAD_CAM_EDM_DRO] Preparing for a Series 1 Retrofit

Correct, but if the pulley has a taper lock hub, you can separate this
component from the pulley itself and chuck that up in the lathe.
Being smooth on the OD, its pretty easy to grip accurately.

And I totally agree that this probably isn't a terribly high-tolerance
part and would be just fine without it.

On Thu, Aug 21, 2008 at 1:00 AM, Leslie Newell
<les.newell@...> wrote:

> I don't think I would do that. I always find boring toothed belt pulleys
> a bit of a lottery. They seldom have exactly the correct number of teeth
> to grip directly in the chuck jaws so you end up having to make a sleeve
> to fit around the outside. Any inaccuracy in the sleeve will of course
> affect the accuracy of the bore.
>
> To be honest, a few thousandths of an inch error isn't actually going to
> make a noticeable difference to the final accuracy of the machine. Screw
> inacuracies, flex, servo following error or stepper 'spring' all add far
> more error.
>
> Les
>
>
> Michael Fagan wrote:
>> In particular, you could rough out the sleeve, finish the OD, then
>> press fit/loctite the sleeve into the original taper lock hub, then
>> finish bore the ID in place. This assures concentricity overall, not
>> just within the sleeve itself.
>>
>>
>>
>
>