Analysis found that the inner shaft was bent until broken, the spiral wrap was stretched, the irrigation barb was deformed, and there were tool marks along the length of the bur.The outside diameter of the inner hub showed deformation.The inner hub outside diameter requirement is 0.330¿ / +-0.002¿ and measured 0.329¿ in the undamaged area and 0.362¿ in the deformed area which is out of specification.The hub bushings were gouged as well.If information is provided in the future, a supplemental report will be issued.
|