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Morning all

Working to AMS2430 must in process media inspection be carried out by sieve analysis?

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Yes, In-use cut wire media is inspected for size via a sieve test. Refer to Column 2 in Table 1.

New cut wire media size is inspected by a specified particle count's weight per AMS-2431/3 for steel, or AMS-2431/4 for stainless.


Dave Barkley
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Many thanks.

It is our intention to use the equivalent cut wire shot of cast shot ie.

96 for 780
41 for 330
14 for 110

Apologies for my ignorance but the chart indicates sieve sizes as:

96 6 - 10
41 14 - 20
14 35 - 50

Does this mean for CWS 14 for example we need a just a No35 & No50 sieve? as we were looking a purchasing a rotap shaker which 5 seizes, so do we just select any 3 inbetween these as well?

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No, you only need to use 2 per size. Just make sure your media passes the requirements at the top of the column.

The top sieve, in your example the #50, cannot exceed 1/2% of the total sample weight remaining on the sieve after it has been run through the RoTap.

The bottom sieve (#35) cannot have more than 20% of the sample weight pass through. You can check for a minimum of 79 1/2% remaining on the sieve or insure no more than 20% of the total weight ends up in the bottom pan.

Note: The cases where 5 sieves are used is when inspecting NEW media other than cut wire.


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Many thanks that helps tremendously, so I assume that it is the supplier responsibility to provide CofC's for new media?

If we were looking at using conditioned (G2) CW would the same seizes still apply, as specified in table 1?

Also in relations we are having some issues clarifying the correct media size for the equivalent mentioned above, should table 1 be used in conjunction with AMS 2431/4C tables 3 & 4 to obtain the wire sizes? ie

780 96 0.096" (2.438mm)
330 41 0.041" (1.040mm)
110 14 0.014" (0.360mm)

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The charts in 2431 or 2430 can be used for cross referencing between media types. Sometimes you might find differences between the two. If that happens it's best to use the spec with the latest date, but let Jack know about it so he can have it fixed.


Don't assume that the CofC is enough.

First: you are ultimately responsible for the work you're doing. If you find the media was incorrect after parts have been run, you cannot count on the media supplier to correct your work.

Second: you should verify that the product you bought is indeed what you have received. I've heard stories of mis-labelled bags. How many parts will be run before it's noticed?

Lastly: I'm going to guess your process is not being audited because you indicated you currently don't have a RoTap machine. If your process will be audited in the future you may have to show YOUR incoming inspection records.


These are all very good questions, and it's good that you care enough about the process to make sure it's being done right.

Last edited by D. Barkley; 11/04/13 03:26 PM.

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Good points, as far as in good received we were looking at weight inspection only, I assumed this was acceptable? If not, and we need to do sieve analysis do we just select any of the sizes between the top & bottom sieves?

And as far as auditing, we have not yet started producing, we are just getting everything is place 1st

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Counting out pieces and weighing them is what you're suppose to do for incoming inspection of cut wire. Sounds like you're doing everything right.


Dave Barkley
EI SPT Director, Peening Preceptor & Product Engineer

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