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#1520 - 03/01/21 03:24 PM Glass Bead for Peening
Dave Barkley Offline

Registered: 04/13/11
Posts: 49
Loc: USA
I'm asking this question on behalf of a recent MRO / FAA repair facility that called me.

They're setting up a small peening machine with glass bead as the media. They've contacted a few distributors and was told that finding glass bead that meets AMS-2431/6 is difficult and other MRO facilities in the region use MIL-PRF-9954D glass bead as an acceptable substitute.

Does anyone have any knowledge/thoughts on this?
Dave Barkley
EI SPT Director, Peening Preceptor & Product Engineer

#1521 - 03/01/21 04:13 PM Re: Glass Bead for Peening [Re: Dave Barkley]
Walter Online   content

Registered: 05/03/99
Posts: 177
Loc: East Hartford, CT, USA
I would say that these specifications are NOT interchangeable without agreement from the cognizant engineering organization.

Here are just a few differences:

1. The size designation are different
2. Silicon content no less than 62% in the MIL and not less than 67% in AMS.
3. The sample size is approximately 60 drams in the AMS and varies with size in the MIL spec from 100 grams to 25.

I would suggest this MRO / FAA repair facility contact a manufacturer of glass beads such as Potters
I'm sure they can tell them who their local distributor is.


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