[mathking]

Originally Posted by Richard Wallace

Al, am I missing something here? 1/8" protrusion of bearings through the AM14U chassis outer plates will be a common feature of many robots this year, because that is the way the kit chassis was designed.

Do you really think a bumper will be stronger if it is located on the bearing protrusion without a pocket? It seems to me that a clearance pocket, or slot, actually makes the system stronger by enabling more surface contact with the chassis sheet metal.

I completely agree about the kit chassis design. We are not using it, but we had some of the new kids put together, wire up and program the kit chassis as a learning (for the new kids) and teaching (for the experienced kids) exercise.

I will let Al answer as to his intent, but I tend to agree with what he said that shallow holes are much better than a slot for preserving bumper integrity. Cutting out a slot will greatly increase the chance of a fracture of the bumper at that point compared to a shallow hole.