Quote:
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Originally Posted by Rickertsen2
Unless you really know what you are doing, avoid setscrews alone. (reads post above me and relizes it says the same thing)
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To quote some guy nobody here has ever heard of, Woody Flowers.
"Set screws inhale audibly!" Kickoff 1999
Never expect a set screw to take any significant load. You can use one to hold a key in a keyway, but even that can be done without if you're clever. There are extensive discussions on the best way to fix a sprocket or gear to a shaft in the archives. Some got pretty passionate about different styles of keys or D and double D shafts. Searching that stuff out would be a good place to start
Some other thoughts:
In general it is a good idea to support both ends of a shaft. A few teams get by without it and leave their wheels hanging out, but they also use extra large diameter shafts.
Keep your motors running fast. If a motor boggs down because it has too much load on it, things start to heat up real fast. This can lead to major problems, including massive escapes of magic white smoke. Design so that the torque does not exceed 25% of the motor's rated stall torque, or so that the motor runs at 75% of free speed. Which are for all practical purposes the same condition. Your motors will be cool and happy and live a long cheerful life. Yes this may mean an extra stage of gear reduction, the longer life will be worth it in the end.
Learn how to crimp wires properly. Spend the money to get a really good crimper. Backup the crimp with solder. Al and the other electron pushers may feel free to add your remarks.
Maybe I'll add some more later
ChrisH