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Watch: Man's miraculous near-miss from runaway saw blade - BBC News (www.bbc.co.uk)

submitted 5 months ago by [email protected] to c/[email protected]

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[–] [email protected] 4 points 5 months ago* (last edited 5 months ago)

The blade got spun up, then came off the saw, likely because the retaining nut came off. The blades aren't on some long mandrel, they're on a short bump of a shaft that the nut screws down to. Take a look at how discs connect to angle grinders and you'll have a good idea of how concrete saws do it