We manufacture a series of pneumatically driven rack and pinion actuators. When the series was originally designed, the engineer chose 1144 stressproof as the material for both the rack and pinion gear. He also specified flame hardening .030" to .060" deep to 50-55 Rockwell C scale of the tooth...
I have a simple "donut" shaped buna rubber bumper of known hardness (70 durometer). I would like to know what the spring rate is so that I can calculate its kinetic energy absorption capability. Can the spring rate be determined from the hardness?
I am reviewing specifications of an older pinion gear design where changes to the specifications were not complete. The measurement over pins was changed to modify the backlash between the pinion and its mating rack. My problem is I need to update the amount of rack movement for a given rotation...
