This bunch is a good source for help. Sears tablesaw model 315-228390. It's the wheel to adjust the blade height. Need part 979918-002. Sears doesn't carry it and I've been unable to find it online. Thanks.

One part source I have used also lists the part as no longer available. Start by measuring the shaft on your saw and go from there. Any pulley or wheel at the hardware store can be made to work. Or look around this site at other table saw brands and take a few chances.
https://www.ereplacementparts.com

Look here:
https://www.mcmaster.com/hand-wheels

Thanks

I bet Fleabay would come through for you. I just tossed two hand cranks from an older (70's era) craftsman table saw, I bet they would have fit. I would have sent them to you if they weren't in the landfill already.

Here is an eBay link

Already tried them but I appreciate the info.