Re: [CAD_CAM_EDM_DRO] Re: Timing Pulley cutter

On Sunday 18 November 2007 12:01, turbulatordude wrote:

> The problem with a fixed cutter is that the shape of a pulley is
> dependant on it's diameter.   as you get larger or smaller, the angles
> and radius's change to accomodate the OD.
> It would appear that one would need one cutter for each diameter.  
> Trapezoidal are harder than round. for round cogs, you can drill them
> and then turn the OD of the part.

belts have enough give that you can get away with one cutter for a pretty wide range of pulley sizes
if you just drill for the HTD teeth you're already doing that ,they aren't really round

you could probably stone the tooth profile onto an end mill in a few minutes
http://www.beltingindustries.com/page13c.htm
and lightly buff the radius on the tops ,its not all that critical

Brian
--
"Nemo me impune lacesset"