The two pulleys are likely for a tight and loose pulley system where the
belt is shifted onto the loose pulley side to stop it while the lineshaft is
still running. The tight pulley is keyed to the lineshaft and the loose
pulley is free to rotate on the shaft (or to be stationary while the shaft
rotates).
Don Young
"Grant Erwin" wrote in message
...
Got another oldie. This one is a Champion No. 97 post drill. It looks a
lot
like the red one on this page: http://www.beautifuliron.com/thepost.htm
but has a longer driveshaft with two flat belt pulleys on it. The table
was
broken in half back where it bolts onto the support, but today Ernie did a
fantastic TIG weld on it using nickel rod, ran a tap through to chase out
the
rust, and the original threads still work. An amazing weld. What an
artist.

Anyway, there are a couple of things about this drill press (which is in
pieces) I don't understand. I don't get the bit about the 2 flat belt
pulleys. Here's a pic of a similar machine with one flat belt pulley, and
you can see the length on the driveshaft where another one goes.
http://www.owwm.com/PhotoIndex/Images/870-A.jpg

Also, the machine is missing the thrust bearing entirely, and it
doesn't look like the same setup as a No. 90, shown on this page:
http://home.att.net/~ilikerust/postdrill.html

Here's a tantalizing fragment:
http://www.roseantiquetools.com/site...res/HSB174.jpg

It mentions no. 97s and one says it has a tight and a loose pulley and
something
about 250 rpm. Hoo boy this has my curiosity going bigtime! It says the
tool
weighs 175 pounds which seems about right - lot of cast iron in this pup.

Can anyone shed any light?

Thanks,

Grant Erwin
Kirkland, Washington