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My digital torque wrench lied to me on a critical job
I use a Snap-on digital torque wrench for most of my work. Last week I was torquing cylinder head bolts on a Continental O-470. The wrench clicked at the right number, felt right, so I moved on. Engine ran rough on the test stand, so I pulled the head back off. Found five bolts that were way under spec, like 40 foot pounds when they should have been 60. The wrench had a dead battery that gave false readings before it finally quit. I checked the calibration sticker and it was 14 months overdue. Now I keep a spare battery in my box and I check calibration dates on everything every 6 months. Anyone else ever get burned by a tool you thought was fine?
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ivan21113h agoTop Commenter
Man, I gotta be honest with you here. I think you might be overthinking this a little bit. Digital torque wrenches are convenient but they're not the end-all be-all. I've used a beam style wrench for years and I've never had a battery die on me because it doesn't have one. It's just a stick with a needle. Sure it's not as fancy but it gets the job done every single time. Plus, checking calibration dates sounds like a lot of extra work when you could just buy a reliable old school tool that doesn't need batteries or calibration.
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wyatt_ross278h ago
Have you ever thought about what happens when a digital torque wrench gets dropped off a workbench? I've seen it happen in my shop, and suddenly that $200 gadget is reading all kinds of wrong. @ivan211 you're spot on about beam wrenches being reliable, but I'll add this: they're also way easier to double-check mid-job if something feels off. With a digital one, you're just trusting the screen until you can get it recalibrated. Plus, beam wrenches don't have that lag where you overshoot the target because the display didn't update fast enough. It's not fancy, but it works.
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