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Re: Hardness tesrters

 

I know feeling of Harry Potter magic wand and dropping ball.
Back in 1970’s when first purchased it I would be ok for cast iron wheels and if work i would be happy.
I was very surprised how well it worked on everything
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Dave
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On Wed, Mar 5, 2025 at 12:11 AM, Jerry Durand wrote:

Any charts for ceramic bearings so you don't need to worry about magnetism??

BTW, I did a demo of magnetism with non-magnetic materials.? Dropped a strong magnet through 200cm of 10mm copper tube.? Took a while to fall out the other end, something nobody in the room had seen or expected.

I did include a wave of a Harry Potter magic wand, just for extra effect.

On 05-Mar-25 11:07, davesmith1800 wrote:
Remember the surface being bounced test needs to clean of oil , any coating and Degaussing.
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