On 1/19/2018 12:13 AM, Puckdropper wrote:
dpb wrote in news
*snip*


The latter bugs me immensely as I have at least three 3x24 belt
sanders (B&D 7440 iirc) that have the motor mounted _between_ the
wheels so the balance is better than anything on the market today.
Unfortunately, the drive gear matching the end of the rotor wears out
and there are no replacements available any longer (nor have been for
20+ yr now) and haven't been able to find anything on open source that
fits. Having one machined was excessively expensive altho that raises
the recent question of what might be done with new 3D printer
technology? Maybe I'll take one in to the local community college
machining class and see what they can do...


How big of gear are we talking? How many teeth and what's the OD?

It's been too long to recall exactly otomh so I'll have to dig one out
to be precise, but roughly 2"OD, probably 60-tooth or so...that's
probably a little high; more like in 40-ish neighborhood probably.

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