Torque is the force the drill produces to turn an object, not how fast an object will turn. In recent years torque ratings have been steadily increasing to levels beyond what is actually needed to complete applications. A new way to measure the performance of a drill is to combine speed and torque, a measurement called Power. Performance Ratings 6991 1446 01g CAT and Cummins Motor 080506 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. Motor Cummins 080506 An Introduction to Stepper Motors Xinda Hu University of Arizona College of Optical Sciences Introduction: A stepper motor is an electric motor that rotates in discrete step increments. The movement of each step is precise and repeatable; therefore the motor's position can be controlled precisely without any feedback mechanism, as