"Wild_Bill" wrote in message
news
This just goes to show that those accountants who control the quality of
products are worth every penny they're paid.
Sadly, it's the destruction of a good name. They (manufacturers) just
don't GAF anymore.

You could (I know, I've seen examples of your work) machine the router
housing end/bearing support section out of aluminum and make the part so
the bearing can be swapped almost effortlessly (well simply), and use
quality bearings intended for high speeds (not 10-for-$1 skate bearings).

I considered making an aluminum insert to replace the nylon one so its metal
to metal which will transfer heat better. I also thought about making my
own spindle cartridge with an off board belt drive, but figuring out which
bearings to use is a real bear. Also weight is an issue for me. Neither
of my smaller machines can really handle a 15 pound spindle assembly. Its
one of the reasons I'm not running the stock spindle (that and the 10K top
speed) on the Taig.

I appreciate the confidence, and the feedback.

Bob



--
WB
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"Bob La Londe" wrote in message
...
Ok, The Bosch Colts seem to be getting worse. The first couple I used
easily ran over 750 hours continuous duty. I think I got over 1000 on
the first one. At the price I just replaced them. The last few have
been running progressively less hours before failure, and the failures
have been faster and more catastrophic with over heating bearings
actually melting the nose out of the router case (nylon press fit busing)
Each one seems to last less than the last with my most recent one failing
at about 250 hours.

I'm looking for an affordable replacement.

Another similar, but better router. Maybe a PC 890?

One of the import 3 phase VFD controlled water cooled spindles?

A bigger router might be ok although I am not maxing out the horsepower
of the Colt. Just wearing out the bearings. Yes I have replaced
bearings on some, and the replacement bearings usually last longer, but
once it overheats and melts out it can't be fixed again. Well, not
economically. I did consider trying to remove the nylon bushing the
bearing rides in and replace it with a home made aluminum one that would
transfer heat better.

The VFD controlled spindles will have less down time (no brushes), but I
am concerned that I'll have to redo all my calculations for lower spindle
speed (max of 24K) and I still need to know if the bearings will hold up
longer, and if they will fail in a less catastrophic and more predictable
manner. They cost more, but if I get more work out of them it might be
worth it.