A-AR104126-AI Bearing, Thrust (.010")One New Aftermarket Replacement Thrust Bearing (. 010" Undersize) Fits John Deere Engines This aftermarket replacement crankshaft thrust bearing is used to control crankshaft end play in Fits John Deere (Fits JD) engines during engine rebuilds. The . 010" undersize designation indicates this is a precision ground undersize thrust bearing intended for use when the crankshaft thrust surfaces have been machined or worn, restoring proper crankshaft