Sprocket, 17T #50, with pulley on one hub with grease zerk. Pulley 1.30"ID x 13.00"OD. It appears to have been mounted by the looks of the ID bushing, but no wear on sprocket. NH 851 1000 PTO.
SPROCKET and Hub, Single, #50 chain, 19 teeth; 1.36"ID x .37" wide keyway x 5.00" wide overall. Hub has 2 setscrews and lock nuts. Application: NH Models 818 and SP818, Engine Drive at Gearbox, 020...
SPROCKET, Single, #50 Chain, 36 Teeth; Smooth Bore 3.00"ID x 7.50"OD. 962 New Holland Head Auger Drive. NH Corn Heads 962N3, 962N4, 962N6, 962W4, 962W5.