Quote:
Originally Posted by garpal_robotics
Hi folks-- ran into the same issue. I ordered the 9664K68 and will wait the 2 weeks for the real deal... However right above that spring on McMaster is: 9664K31 it is a lighter gauge wire .105 vs the .135 but it has the same outside diameter... I think it will get us through prototyping in week one. (it was available right away)
Hope that helps a little.
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Word of warning: 9664K31 won't behave anything like the official spec 9664K68. The field official spring has 24lb starting force and 159lb/in spring rate. The replacement you spec'd is a 9lb spring with only 14lb/in spring rate, nearly an order of magnitude less stiff than the competition spec.