I have an electric motor with a chain drive sprocket in a galvanized steel box that had been used to turn the base of a Tri-Ex 72 foot crank up tower. Another sprocket was mounted at the tower base. I already sold the tower, but the motor and chain drive sprockets are for sale now. The chain is rusty and should be replaced. You may have it as a guide in purchasing chain. The tower buyer decided to not turn that tower. Instead, he mounted it on a large truck trailer.
If interested, please call me, William N. Goodman, CPA (Bill), K3ANS. Home 610-253-2745, office 610-253-2745, cell 484-241-6176. No set price. Looking for offers.