I've got a Sears electronic table saw, model 113.290650, which has worked perfectly for years. Recently I had to move it around, and in the process the two bolts that hold the top to the base came loose, and evidently the motor & pulley got misaligned, so the pulley loosened and the Woodruff fell out. I couldn't find it, and couldn't find one to fit, so I had to file one down. It seemed to be a perfect fit, but every time I put the Woodruff key in the slot on the arbor and tighten the pulley's set screw, it comes loose in just a minute or so. The pulley on the arbor and the one on the motor appear to be in perfect alignment, so I'm mystified (although it does seem to vibrate now, which might be the problem. I've since ordered a Woodruff from Sears that's supposed to be a direct replacement (was trying to make the repair faster than the Woodruff would be delivered -- mistake). Any ideas??
BTW: if anyone needs a manual for this saw, you can download it @ http://www.managemylife.com/mmh/owner_manuals/10037/CRAFTSMAN-Saw-Table-L0903676?brand_name_search=113290650+CRAFTSMAN
you can download a copy of the manual