This is a A-R561721 Shaft, PTO, 1000 RPM PN: R561721Main Description As Following : A-R561721 Shaft, PTO; 1000 RPM P.N: R561721 Dim A (1): 9.60" LongDim B (2): 20/33 SplineReplaces: R122910, R266970RPM: 1000Shaft Size: 1.750" Replaces: R122910 JOHN DEERE , R266970 JOHN DEERE , Crossed From: HR122910 , , R122910 JOHN DEERE , R562721 JOHN DEERE , WN-R122910 , , WNR122910 , Found in Section & Models : PTO Parts > PTO and Related Parts, John Deere TRACTOR: 7630, John Deere TRACTOR: 7720, John Deere TRACTOR: 7730, John Deere TRACTOR: 7820, John Deere TRACTOR: 7830, John Deere TRACTOR: 7920, John Deere TRACTOR: 7930, John Deere TRACTOR: 8100, John Deere TRACTOR: 8110, John Deere TRACTOR: 8120, John Deere TRACTOR: 8130, John Deere TRACTOR: 8200, John Deere TRACTOR: 8210, John Deere TRACTOR: 8220, John Deere TRACTOR: 8225R, John Deere TRACTOR: 8230, John Deere TRACTOR: 8235R, John Deere TRACTOR: 8245R, John Deere TRACTOR: 8260R, John Deere TRACTOR: 8270R Associated Items : New Also A-JD-O-OMR65222, A-JD-S-TM1143 And : Length: 9.60" Replaces: R122910, R266970 RPM: 1000 Shaft Size: 1.750" Spline: 20/33