API STD 613 pdf download.Special Purpose Gear Units for Petroleum, Chemical, and Gas Industry Services 1.5 DEFINITION OF TERMS 1.5.14 maximum allowable speed (in revolutions per minute) is the highest speed at which the manufacturer’s design will permit continuous operation. 1.5.15 maximum continuous speed (in revolutions per minute) is the speed at least equal to 105% of the rated pinion...