Does anyone know the chemical composition and mechanical properties of Rd65 VL22 Copper alloy. Or where I could get it from. Also the Standard from which this material comes from would be useful.
I have searched the internet and am unable to find its specification.
"Materials - The worms are case-hardened; the bore and worm flanks are ground. Standard worm gears are made from VL22, a copper-zinc alloy with aluminium, silicon and manganese additives."
Copper and zinc make brass. You did a lot better than I did. I could find no listing of anything useful on google with the information supplied. Good work!
I thought 9 copper : 1 tin was brass. And that 1 copper : 9 tin was bronze. I thought some math textbook from when I was a kid said this. Maybe 9 copper : 1 tin for BRONZE would be okay, judging by a few internet pages. Is there some other thing which is 10% copper, 90% tin? I saw some mention of pewter with this kind of ratio. To the OP's question, I didn't even know that worms had gears.
1) The VL22 is a special gear bronze - a bronze gear alloy with apprently no lead. Aka known as Aeterna (the mfg?)
2) Are you sure about the R "d" 65? If it is actually a "b", that would be the hardness used in bronze gears. The D scale is a lot harder than the C used for steel or the B used for bronze. The D would show up if the bronze was somehow face-hardened.
3) I think, but I wouldn't bet the house, that it is from a French or German mfg
4) If you had a CDA (Copper development Association) number for the alloy, the alloy that was registered by the manufacturer to get a number, it would help a lot.
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