Quote:
Originally Posted by Bruceb
I am trying to use the design calculator and there is a field in there for gearbox efficiency. How do I know what that is for a chain driven gearbox of our own design?
Help
Bruce
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Chain and spur gears are usually somewhere around 95-98% efficient if assembled properly.
To determine overall efficiency, you have to multiply the efficiency of each stage. A KoP drive train, for example, has two stages of gear reduction and a third stage of chain reduction.
If we assume that each is 95% efficient, you'd multiply .95*.95*.95 and end up with about .86. So, that drivetrain has an efficiency of about 85%.
For comparison, if you assume 98% efficiency in each stage, overall efficiency jumps to 94%.