Re: Souces of Timing/Drive Pulleys

--- In CAD_CAM_EDM_DRO@y..., ballendo@y... wrote:

> Hi,
>
> If you have a lathe and some skill with it, a version of taper-lock
> hubs is not difficult to fabricate. You bore a taper in the pulley.
> You turn a taper to match on a previously "flanged" rod. You cut it
> off(or first do the following step with live tooling, or a toolpost
> mounted drill/drill chuck). You drill holes for the tightening/
> releasing screws. You tap the appropriate holes: 1/2 in the pulley,
> 1/2 in the flange. You slit the flanged piece. Deburr. Done! Pretty
> quickly accomplished.
>
> Hope this helps.
>
> Ballendo

The hubs are quite cheap it's the pulleys that can work out expensive.
You need to drill and tap the holes in the pulley BEFORE you turn in
the taper as it's impossible to tap a hole 1/2 and 1/2 and keep it
true. If you keep to the Fenner standards you can then change ratios
at a later date with no problems and mix and match pulleys and hubs.
J.S.