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

turbulatordude wrote:

>
>Another way it you really want to indicate is to just use a flat
>stock on the carriage/ways. that will ride up and down with each cog
>of the pulley.
>
>but a 'Last Word' type indicator would allow just the tops of the
>cogs to be indicated.
>
>
>

If you have a decent 3-jaw chuck, there's no need to indicate, unless
you want
to prove that the pulleys are (or aren't) concentric. But, if you are
going to
bore them anyway, you just need the OD to run true when boring.

What I did is cut a ring of aluminum that would fit between the pulley
flanges.
The OD is greater than the flange OD, the ID is a very close fit to the
pulley
cogs OD. I then cut the ring in two parts with a bandsaw. The ring halves
are slipped into the flanges and the whole thing is placed in the
chuck. (I have
an adjustable 3-jaw chuck, so I can set it to run as true as I need it
to. But,
it generally is within .0003" or so, without even checking.) This makes
very
quick work of mounting a bunch of pulleys for boring out.

Jon