Mich. Admin. Code R. 408.14244 - Hammer die keys
Rule 4244.
(1)
A hammer die key and shims shall be made from a grade of material which does
not crack or splinter when treated. A die key shall project not more than 3
inches in front or in back of the ram or die.
(2) A head of a key shall be kept free of
mushrooming and splitting by grinding off any flaring.
(3) A head of a manual key driver shall be
kept free of mushrooming by grinding or machining. A cutting torch shall never
be used for this. A driver shall be suspended from a securely fastened beam
with chain or cable of sufficient size to handle the weight of the driver plus
a safety factor of 5. Chain, cable and fasteners shall be kept free of twisted,
bent or elongated links. A driver shall be made of steel that will not chip on
impact.
(4) A pneumatic key driver
is recommended. The driver shall be made of steel that will not chip on
impact.
Notes
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