Having an older Craftsman 12 inch radial arm saw, that by the way has been recalled because of no blade guard, I decided to make a blade guard using an old bike chain. I plan on putting another one on the other side of the blade when I find another chain. BTW Make these at your own risk, the author is not responsible for any injuries or damage that may occur due to the use or attempted use of this idea.
Step 2: Front View
Step 3: Check Clearance
Make sure that the chain can NOT contact the teeth of the blade. The bike chain has quite a bit of lateral movement. I might try a motorcycle chain.