On Jan 11, 2012, at 8:17 PM, "Randall" <tr3driver at ca.rr.com> wrote:
> Has anyone tried either the contact
> http://goo.gl/BZ98H
> or non-contact tachometers from HF?
> http://goo.gl/usd3Q
>
I've used one much like that. Worked fine. I was using it on a pulley.
$30 seems steep. Look around. ( but even $30 is cheap enough to try it )
One thing to investigate is what the smallest diameter it can deal with is.
> I'd like to map out the various spindle speeds for my 10" lathe, vertical
> mill & drill press; plus I occasionally want to know how fast some other
> shaft is turning. For example, at the moment, I'm trying to repair an old
> speedometer and it would be a lot easier to test if I could spin it with a
> drill motor and know what it should be reading rather than having to
install
> it in the car and take a drive.
>
> -- Randall
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