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.
MIL-STD 202 establishes uniform methods for testing electronic and electrical component parts, including basic environmental tests to determine resistance to deleterious effects of natural elements and conditions surrounding military operations and physical and electrical tests. It is now known as the international military standard.
● 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.
Explore Related Tumbling & Drop Test Solutions
Advanced mechanical reliability testing equipment and technical standards.
Engineered for Strict MIL-STD-202 Method 203 Compliance
Designed specifically to evaluate the structural integrity of electronic and electrical component parts, this typical two-cage random drop test machine perfectly simulates the random, repeated impacts experienced during harsh handling, shipping, and field service operations.
Engineered to strictly comply with the parameters set by the Department of Defense test method standards, the dual-cage assembly rotates around a common axis at a mandatory precise speed of 4 to 6 revolutions per minute. This highly controlled mechanical environment easily exposes structural weaknesses that standard vibration and shock tests might fail to detect.
Automated Precision for 45-Minute Continuous Testing
By replacing inconsistent testing methods with a heavy-duty automated drive system, this equipment ensures that every required 45-minute continuous drop test cycle is executed flawlessly. The robust steel cage design guarantees high durability even under constant mechanical stress.
During operation, specimens are securely mounted within specially designed steel sleeves without end caps, ensuring that no external hardware or terminals extend beyond the protective area. Featuring an intuitive digital control panel, this industrial-grade apparatus provides laboratory technicians with a dependable, vibration-free solution for certifiable global quality control.
