MIL-B-16029G
cutting edge, multiplied by the average inside bucket width, which is
determined by measurements of the top and bottom of both the front and rear
reference points of the bucket. The weight of class S buckets, as delivered,
shall be not less than specified for the respective size in table I. In
addition, the delivered weight of class S buckets of size 37 through size
100 shall not exceed the respective specified weight by more than 10 percent,
and the delivered weight of class S buckets of size 150 through size 350 shall
not exceed the respective specified weight by more than 12 percent. The
delivered weight of class P buckets shall be not less than 97 percent of the
weight specified in table I, for the respective size of class S buckets. The
bucket body, including teeth, hitch, plate pines, trunnion pins, and anchor
pins shall be not less than 70 percent of the total weight of the bucket.
TABLE I. Capacitiies and weights (weights based on class S buckets).
3.6 Components.
3.6.1 Bucket body. The bucket body shall include bottom, side, and back
plates, with partial or complete lip and bottom, dependent on manufacturer's
commmercial practice. Method of connecting bucket body assembly of arch, lip
or complete bottom, hoist trunnions, hitch plates, runner bars, heel plates,
and comer wearing shoes shall be either cast integral or welded, or
combination of both. The body shall be designed in accordance with best
commercial practice to handle the class of excavation for which it is
intended. The inside surfaces shall be smooth and free from projections. The
connections between the bottom and side plates shall have a radius and the
back plates shall be curved sufficiently to provide satisfactory loading and
dumping performance. Cast lips or cast bottoms and connections to body and
side plates, shall provide a firm joint that is consistent with industry
practice for weldments or riveted components. Inside clear width at the lip
shall be slightly larger than at the heel to facilitate the discharge of
adhesive material. The plates for the bottom, sides, and back of the bucket
shall be of steel which meets or exceeds the requirements of ASTM designation
A 36. The back and side plates of class P buckets shall be perforated in a
manner that will not impair or weaken the bucket strength.
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