Reply by Jon Hobbs

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Posted on Face shield when using the table saw

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Jon Hobbs

147 posts in 1121 days

#1 posted 02-23-2018 07:28 PM

Maybe I ll buy the face shield and take a swing at it with a baseball bat. If it stands up to a straight hit from a bat, surely it would withstand a kickback, yes?

First, the helmet must be secured in a manner similar to the way it’d be while wearing it. If you just set it on top of a table and whack it with a bat, that’s not the same. When it’s on your head, your head and body will provide a resistant force to the kickback or bat. That significantly increases the forces applied to the mask/helmet vs. if it’s unsecured when it is struck.

Also, the design of many impact protection devices allows that device to deform and become damaged when impacted. Sort of sacrificing itself for the benefit of its wearer. Thus, applying your baseball bat test to the mask could render it useless in protecting against another impact.

I believe the linear velocity of the teeth on a table-saw is around 200mph. Obviously, not all of that energy is transferred to a board during a kickback, but it’s possible that a kick-backed board may be moving at triple-digit speeds. Can you swing a baseball bat at 100mph?

Probably best to leave the testing to the experts referenced by Hermit :)

-- Jon -- Just a Minnesota kid hanging out in Kansas

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