I vaguely understand hardness/brittleness trade-off. I'm wondering if a 1/4" diameter diamond drill would disintegrate if it were repeatedly struck on concrete similar to the force you would apply striking a screwdriver tip against a concrete sidewalk.
Thank you.
From your other post, it sounds like you want these for your ski poles. A PURE diamond drill would be very hard, but extremely brittle, would snap the first time you tried it. all the diamod drills you buy are a relatively soft steel shaft with a diamond dust in matric coating. Not really very relevant to your application.
For your first try at this, just get a piece of 1/4" hardened drill rod from
Do some reading on "strength of materials". Pay particular attention to "modulus of elasticity". It sorta desmystifies the hard-brittle-springy-thingie.
Why don't you try diamond points for dressing grinding wheels? Get them from MSC or another supplier, or you can find them cheaper on eBay.
John Martin
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