On 10/19/2017 06:35 AM, Leonardo Marsaglia wrote:
Hell to all.
I came across this leeb harness tester on Ebay and I would like to know if
anyone on the list has had any experience with such a device. The links for
the listing and description are the following:
https://www.ebay.com/itm/Portable-Rebound-Leeb-Pen-type-Hardness-Tester-Gauge-for-Metal-Steel-SL-150-/253068269731?hash=item3aec0b58a3:g:MpAAAOSwa8dZ2I~A
The usual problem with dynamic hardness testers is the mass of the
specimen. A thin or poorly supported part will give a false low reading
as the specimen can deflect from the impact.
Search for Detroit Hardness Tester, it uses a bouncing ball with a
calibrated tube. You simply drop the ball in the tube and watch the
height of the rebound.
Make one yourself with bearing balls and tubing if you have some
accurate samples.
Ed.
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