Replaces part# H118583. Fits Models: 6620, 7700(SN111901-), 7720, 8820, 9400(SN641501-), 9500(SN643901-), 9600(SN645301-). 10 Tooth, 1.7500'' Hex Bore Split Sprocket. Replace the worn Sprockets and Idlers on your combine to extend the life of your chains and improve overall performance. Loewen has a complete range of regular Sprockets and Idlers as well as Split Sprockets for some models, for easier installation.