On 12/2/2011 1:22 PM, Bob La Londe wrote:


"Tom Gardner" mars@tacks wrote in message
news
On 12/1/2011 6:16 AM, Pete C. wrote:

Tom Gardner wrote:

A recent post by Bob Le Londe makes me want to explore using a
router to
spin a 1/32" x 6" cut-off disk. A brand new router will cost less than
the two Barden bearings in my current spindle that is run at 10k with a
1hp 3-phase motor and a flat belt. That spindle started life as a drill
quill 50+ years ago and it's showing it's age and wear...nothing if as
perfect as it should be for quiet, trouble free production use. Thus
the quest for a better solution.

So, what's the best way to mount a wheel with a 7/8" AH to a 1/2"
collet on a router? Something off the shelf?

Will that brand new router last as long as the new set of bearings for
your current spindle? How much labor and down time will each router
replacement cost you vs. rebuilding the current setup and letting it run
a few decades before needing attention again? How about brush
replacement on a router motor vs. none on the current 3ph motor?


I use Hitachi routers for some operations. They are cheap and last
about 6 months. The barden bearings in the spindle last about the
same. We can change out a router in less than 5 minutes, the bearing
change takes about an hour. The routers usually die before they need
brushes.

How many hours under load? If I got 6 months of 40-50% load time out of
a router I would be absolutely thrilled.




I would guess about half that. We slot a Beech block 1-1/2" wide x
1/16" to 3/32" deep. We did add a 5hp Powermatic shaper to the job
because it's a LOT quieter and will almost never need parts.