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Testing massive cylindrical rollers without a cust
Testing massive cylindrical rollers without a cust
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Guest
Guest
Apr 19, 2026
11:32 AM
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Hi everyone! I’m a maintenance guy at a paper mill, and we need to check the surface hardness of our massive drying rollers during the next shutdown. These rollers weigh tons, and their surface condition is critical. I’ve heard that portable testers can be tricky on curved surfaces, even large ones. Is there a specific technique or impact device that works best for large-diameter solid steel rolls? I need to be sure the readings are consistent across the entire length of the roller without having to build a custom jig for the probe.
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ThreadHunter
Guest
Apr 19, 2026
12:38 PM
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For massive rollers, the sheer weight is more than enough to get excellent results with the rebound method. The only real issue is keeping the probe perfectly straight against the curve. A standard Leeb device works great, but you definitely want one that comes with different support rings for cylindrical surfaces. I’ve used the models from https://teqto.pro/portable-hardness-testers/leeb-hardness-testers for calender rolls before, and those contoured rings really help with stability. As long as you take a few shots and average them out, the accuracy is spot on, and it takes barely any time at all.
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Guest
Guest
Apr 19, 2026
12:53 PM
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Contoured support rings sound like exactly what we need to keep the probe steady, thanks!
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