MARTIN 5WB 5X11 S-30-16-3020 Cable Pulley for Crane Conveyer Elevator 12" dia.  

Brand new, old stock from utility company.  Never used.  Excellent condition except for some nicks and scuffs from storage.

Utility company stock number is CVRAT003, so I am pretty sure these are for a conveyor, probably a coal or ash conveyor.

TWO available, Price is for ONE (1) unit.  Buy both and get 10% off.

Slightly different markings.  Sort of hard to read but one says 5WB MARTIN 530-16-3020,  other says 5X11 MARTIN S30-16.

12" diameter, except side with raised flange on one side of cable groove is 12.5" diameter.

Groove is round at bottom and 0.70" across top.

Hub is for tapered shaft, and measures approximately 3.98" to 4.25" i.d., and is 2" thick.

Hub has 3 locating / retaining pin holes, and 2 are threaded.  I believe the threads are 1/2" NC (13 pitch).

Weight is about 55# each.