Originally Posted by
Caleb Crosby
yes indeed Bill, I actually googled cast iron tear out with grade 8 bolt earlier today and your right at what I found- 5/8. just for the sake of discussion my 'lazy route' shortening a new stud would give me about 1/2" engagement which for a table saw I suspect would be plenty close enough. This Rockwell contractor saw is not very heavy but 2x4's are a good idea. Did I mention the bolt that sheered off was a grade 5. I'm impressed Rockwell used good fasteners - but not good enough!
Why do you feel that you need grade 8 bolts? It's not like there'll be a lot of pressure on the table top. Can you even reach the torque spec for a grade 8 in the cast iron top without pulling the threads out of the hole? It's not that Rockwell didn't use "good enough" fasteners but that they used adequate fasteners without spending for unneeded expenses. I bet you could hold that table down with ungraded bolts. And if you're worried about vibration squirt some blue locktite on the threads
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