AA-F-358J
Exceptions to MIL-STD-167-1A - None
The cabinet shall be mounted to a 1 inch thick, 36 inch by 36 inch (minimum) steel plate with six Grade 5, �-13 UNC hex head bolts and lock nuts. The bolts will be tightened to 75 ft-lbs (dry). This plate will then be mounted to the vibration test machine. Each drawer shall be loaded with 20 pounds, which
shall not be compacted or held in place by the follower block. The cabinet will then be locked. The cabinet may not be opened, removed from the mounting plate or the load adjusted in any way for the duration of the test.
The cabinet shall be subjected to the following tests with vibration frequencies as defined in Table V.
(1)Exploratory test. The cabinet shall be vibrated at frequencies from 4 to 33 Hz at a table vibratory single amplitude of 0.010 ± 0.002 inch. The change in frequency is to be made in discrete frequency intervals of 1 Hz and maintained at each frequency for a minimum of 15 seconds.
(2)Variable frequency test. The cabinet shall be vibrated at frequencies from 4 to 33 Hz at a table vibratory single amplitude as shown in Table IV. The change in frequency is to be made in discrete frequency intervals of 1 Hz and maintained at each frequency for 5 minutes.
(3)Endurance test. The cabinet shall be vibrated for a total of two hours at the resonant frequencies chosen by the test engineer, or at 33 Hz if no resonances were noted. If more than one resonance was evident, the two hour endurance test will be divided proportionately between the resonances chosen by the test engineer.
TABLE V. Vibratory Displacement of Environmental Vibration.
Frequency Range (Hz) |
Table Single Amplitude Displacement (inches) |
4 to 15 |
0.030 ± 0.006 |
16 to 25 |
0.020 ± 0.004 |
26 to 33 |
0.010 ± 0.004 |
The test shall not cause the container or any of its component parts to break loose from their mountings. There shall be no appreciable distortion to the cabinet or pedestal nor weakening of any of their mechanical attachments or welds. Additionally, any resulting damage to the security protection afforded by the cabinet, or its operation, shall be considered as failure to meet the test requirements. Failure of the test shall provide reason to reject the sample.
4.7 Inspection. A visual inspection shall be made of the product to determine compliance with the requirements specified in the following paragraphs:
3.2 Material
3.3.2 Dimensions and weight
3.3.3 Assembly
3.3.4 Drawers, including design, construction, face hardware, stops and
latching mechanism
3.3.5 Follower block
3.3.6 Drawer suspensions
3.3.7 Drawer dimensions
3.3.8 Carrying handles and dial knob protector
3.4 Locking mechanism and lock
3.5 Pretreatment and finish
3.8 Cabinet labels
3.9 Workmanship
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