Recent content by markarnold

Diamondjim, thanks for the reply. 1. The fillet did not change. 2. It is a full radius fillet. 3. Our specification on the steel did not change. Our supplier supplied certification of material which we had independently verified. 4. The heat treater for the supplier claims to not have changed...

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...

The application is to dampen the noise from the impact of a pneumatic cylinder.

Is it then more of an experimental determination? Or are there other factors I can calculate?

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?

OK, it makes sense now. The tooth may decrease in thickness, but the actual pitch between the teeth will not change. So the ratios will remain the same. Thanks for your help!

OK, lets say I have a pinion gear that was originally designed with 16 teeth and a pitch diameter of 1.000 inches. Then the diametral pitch=16 (number of teeth divided by the pitch diameter) Later, the pitch diameter was changed to 1.034. Would that then make the diametral pitch=15.474? The...

diamondjim, then I need to verify the tooth pitch on the rack to determine how much linear movement each tooth on the rack translates to.

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...