Of the various >60‑year‑old power tools I use, the jigsaw gives the impression that it's the closest to failing. The mechanism that converts rotary motion to reciprocating motion is inherently more prone to wear than tools whose power‑driven parts only rotate. I recently started running the jigsaw at a slower speed and it's not making the nasty noise it was making at the speed my dad had it set up with. Running it slower might allow me to get more use out of it—kind of like my body.

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