Chain Length and Sprocket Center Distance http://gearboxesagricultural.com/chain-length-and-sprocket-center-distance/
How you can Pick the proper Chain http://gearboxesagricultural.com/how-you-can-pick-the-proper-chain/
Chain Wear-elongation Check out Gage http://gearboxesagricultural.com/chain-wear-elongation-check-out-gage/