This is a A-AH93152 Sprocket, Walker & Shoe Drive PN: AH93152Main Description As Following : A-AH93152 Sprocket, Walker & Shoe Drive P.N: AH93152 Dim A (1): 15 & 18 teeth, 50 chainDim B (2): 3.316" & 2.592" ODDim C (3): 19 ID spline Crossed From: AV103846 VAPORMATIC , WN-AH93152 , , WNAH93152 , Found in Section & Models : Separator Area > Separator Sprockets and Sheaves, John Deere COMBINE: 6620 (SN <-610300), John Deere COMBINE: 6622 (SN <610400) Associated Items : New Also A-JD-O-OMH111330, A-JD-O-OMH120048 And : Dim A (1): 15 & 18 teeth, 50 chain Dim B (2): 3.316" & 2.592" OD Dim C (3): 19 ID spline