Quote Originally Posted by Ralphxyz View Post
I wondered how many HP that would be good for.

Ralph
It is a little difficult to put an exact figure on it not knowing the pitch the roller diameter the pin diameter the roller width and the side link plates thickness. and the small sprocket RPM
All roller chains larger than the ANSI 240- or 3-inch pitch are classed as engineering chain for a reason. They are engineered to specifically suit the application. For all I know it could be capable of many times the number I mentioned. the ANSI Design horsepower charts for standard roller chains have a significant FOS to them as well. Even at that if you are designing something requiring roller chain drives that are near the upper limits of the DHP for that chain pitch and small sprocket dia. for a given minimum RPM and engineer will often recommend the next larger pitch for long life running, especially if there is anticipated shock loading such as start up under full load. If there are to be space restrictions the engineer may sign off to 1 sized under ratted when gentle start up or unloaded conditions can be met. and you are able to accept a reduced service life.