Dar S.
sheltech@webtv.net

>On Sun Jun 9, Dar S. wrote

>>(Reminder: the urethane we've been using is 'shore a', one of the scales used to designate hardnesses of such materials. Shortly I'll bring up 'shore d'. Some confusion could arise because of the use of the letter d , for 'durometer' , a descriptive term not indicative of
>>scale type, and used with different scales.)

>> So our '80d '  is actually 80 duro, shore a, and what I just tried is 75 duro , shore d. From now on, I'll drop the duro d, and only call them by their shore and duro number. 80a and 75d , for example

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I 'sure' don't, but Lee might know where to look. I try not to get more involved than the MSC catalog, which is where I found the 75d that I have. A simple graphic chart there is about it for me. McMaster Carr might provide more of an explanation. Let's see what the Big Cheese has...  
>>Dar
>