John Deere Original Equipment Chain Sprocket - H228385

John Deere Original Equipment Chain Sprocket - H228385. Clean Grain Elevator Drive Chain Sprocket. Specs: Chain Number(ALPHA): CA550HD. Number of Teeth(A)(UNITY): 10. Bore Size(IN): 1.38. Bore Detail Code(ALPHA): RK. Hub Length(IN): 2.59. Material(ALPHA): N.IRON. Finish(ALPHA): A-Heat Treated. Fits the Following John Deere Models: 9770 STS, 9870 STS, S7 700, S7 800, S7 850, S7 900, S670, S670 PRECISION UPGRADES, S670H, S680, S680 PRECISION UPGRADES, S680H, S685, S685H, S690, S690 PRECISION UPGRADES, S690H, S770, S770 PRECISION UPGRADES, S780, S780 PRECISION UPGRADES, S785, S790, S790 PRECISION UPGRADES. This is a OEM John Deere Part.