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Thermal image of cutting a metal bar with a hacksaw (thelemmy.club)
submitted 1 month ago by to c/mildlyinteresting@lemmy.world
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The bar is clamped in a metal vise, so the vise is very slightly heated and that side of the bar is much cooler.

Taken using the Topdon Android attachment.

Thermal image of cutting a metal bar with a hacksaw
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[–] 4 points 1 month ago (2 children)

The fact that this comment exists, and that it's the top votes, is why I'm on Lemmy.

Nice tip! When I buy a thermal cam, I'll put in an order kapton tape too.

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  • [–] [S] 1 point 1 month ago (1 child)

    I do have some kapton tape. I've heard black sharpie on masking tape too. The cutoff piece was definitely uncomfortable to hold but not in the range of instant burns; also a pretty dull surface. I wouldn't be surprised if it were a bit about 107⁰F but I don't think it was near 300⁰F.

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  • [–] 2 points 1 month ago

    Haven't used sharpie and masking tape before, but I've used kapton at relatively high temps (500F). Contact pain for metal typically starts around 113F (45C), but I was referring to right where you were cutting, not where you were holding.

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