Shaft Twist Inspection Tool
Since its design, the U.S. Army has reinforced a specific combat vehicle with additional armor, nearly doubling its original weight. With the added load, the vehicle's differential components can fail, and a particular splined shaft is the weak link. To maintain these vehicles, the Army periodically disassembles and rebuilds them, at which time they inspect this splined shaft. The shaft is rejected for reinstallation if it has any signs of plastic twist deformation. Currently the shafts are visually inspected, but angles of twist less than 1° are undetectable to the naked eye. The U.S. Army ...
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