Posted On: 03/04/2016 2:25:43 PM
Post# of 22940
I just got a nice email from Bill regarding the Type A version of the SAE-AS81820 standard that the bashers over on the other site were hammering on. Here's Bill's informative reply:
The Rev levels C and D added information to the standard 81820. Rev C added a new A series bearing that will run for 100,000 cycles. We will test to that standard later this year. Rev D added information regarding ball passivation and soaking of the bearing in liquid nitrogen. It also removed chrome from the ball. We were tested and approved under Rev D prior to the Rev level being written, since NAVAIR was already subjecting bearings to soaking in liquid nitrogen and since we did not plate our balls (it was optional) and did have them passivated. We are in compliance under Rev C and D and met the standards of both Rev C and Rev D. Again, we did not test under series A of Rev C, but we were tested under the spec for non-A type bearings. Rev C includes qualification criteria for both A-type and non A-type bearings.
Bill McKay
626-755-1211
Looks like the testing process to be carried later this year to Rev C specs for Type A bearings will silence some of the critics, however it's good to note that unofficially, TPAC already is in compliance with that standard.
The Rev levels C and D added information to the standard 81820. Rev C added a new A series bearing that will run for 100,000 cycles. We will test to that standard later this year. Rev D added information regarding ball passivation and soaking of the bearing in liquid nitrogen. It also removed chrome from the ball. We were tested and approved under Rev D prior to the Rev level being written, since NAVAIR was already subjecting bearings to soaking in liquid nitrogen and since we did not plate our balls (it was optional) and did have them passivated. We are in compliance under Rev C and D and met the standards of both Rev C and Rev D. Again, we did not test under series A of Rev C, but we were tested under the spec for non-A type bearings. Rev C includes qualification criteria for both A-type and non A-type bearings.
Bill McKay
626-755-1211
Looks like the testing process to be carried later this year to Rev C specs for Type A bearings will silence some of the critics, however it's good to note that unofficially, TPAC already is in compliance with that standard.
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