The MIL-STD-202-203 random drop test is used to determine the effects on component parts of random, repeated impact due to handling, shipping, and other field service conditions. The test is an accelerated test designed to indicate structural and mechanical weaknesses of types not necessarily detected in shock and vibration tests. The random-drop test machine consists of an assembly of either two or four steel cages, with provisions for rotation about a common axis.
● 1st, April 1980 released the MIL-STD-202F version (military standard)
The test methods established in MIL-STD 202 for environmental, physical, and electrical tests shall also apply, when applicable, to parts not covered by an approved military specification, military sheet form standard, specification sheet, or drawing. The technical staff from Wewon Environmental Chambers Co., Ltd. can provide guidance in this area to ensure proper testing paths are appropriate. The most current revision of MIL- STD 202, Revision H, replaced Revision G. Updated revisions of the test methods are indicated by a letter following the method number.
The specimen shall be rigidly mounted by the normal mounting means in the steel sleeve so that no part of the specimen, including terminals or external hardware of the component, will extend beyond the sleeve. When necessary, a suitable adapter may be used within the sleeve. End caps shall not be used on the sleeves. Through bolts may be employed as needed to mount the specimens in the sleeve.
Only one sleeve shall be placed in each cage during test. The number of specimens mounted in each sleeve shall be limited only by the available space. Specimens shall be subjected to the random-drop test for a period of 45 minutes at a speed of four to six (4 ~ 6) revolutions per minute. The machine shall be rotated in the direction shown on below picture.