"PrecisionmachinisT" wrote in message
news:F4edncYvs_DDP8fSnZ2dnUVZ_vWdnZ2d@scnresearch. com...

"Karl Townsend" wrote in message
...
i had bought a second CNC Excello 602 for parts. My main machine needs
a tighter spindle so I took the old head apart today. I'm glad i had
an old unit to learn on, it was tuff going. I had to make up a couple
super special tools and spent more time machining than wrenching.

I learned the spindle cartidge can just be dropped out without
removing the head, big time saver on the main machine. I'd kind of
like to replace the lower bearing seal on the hi/lo gearbox but that
means removing the head so I'll likely skip this part.

When I finally got the spindle cartridge apart, little ball bearings
fell all over the floor. A couple evaporated into thin air. I guess
thay aren't good enough to re-use anyway.

I need to order bearings, the manual calls for:
2 each 7206 CTC/C78G05
1 each 7010 CTC/C78G1
1 each 7208 CTC/C78G

I can order locally and PAY. Anybody suggest a lower cost bearing
supply outlet?


Ebay.

You need a good interchange chart to double check but in all likelyhood
the first 2 on your list are simply #206 in Barden and something like
2mm9206 in fafnir for example.

http://www.ntnamerica.com/product-su...rchange-search


The last few digits (IE the "ctc/c7xx" ) part of the bearing are
generally not important for the purposes of a spindle bearing--main thing
needed being physical size ( ID OD and thinckness ) and actual contact
angle.

SEE
http://www.ebay.com/dsc/i.html?LH_Ti...arings+2mm920*

AND
http://www.kalamaprecision.com/beari...g%20manual.pdf



http://www.ebay.com/itm/7206-Nachi-A...em1e5b1a cc65

A gold or silver colored box generally denotes a higher quality class 9