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If you contact BobCAD, your company may still own the old license. If you do, you should be able to download and activate it to look at the old files, unless it's a version that used a dongle.

I think the center pulley was from a "shift on the fly" type riding mower, mabe an mtd. A lawn mower repair might be able to recognize it.

Anyone play with cox airplanes?

Just curious, how old are indexable carbide inserts?

self winding watches
4 wheel drum brakes
manual chokes
left handed lugnuts on dodges
cars with chrome bumpers
kick starters on motorcycles
sears catolog

Are you talking about controling the machine with the external computer, or drip feeding programs into the existing control?

I pulled the cover off of the trak mill at work today. It measured 83 7/8" from the bottom of the base to the top of the counterweight spocket assembly. If you have some bars to block the...

I don't know how good they are, but smithy has some fairly large machines on there web site.

You can use the boolean unite function to join the revolves into one solid, then use the unstitch function in the solids menu to separate the surfaces.
Once they are separated, delete the surfaces...

This was done using a portion of an elipse with a short line attached to one side. I used revolve surface to make the surface. Hope it comes through.