The Dewalt 1004685-00 Spindle Assembly supports smooth and controlled rotation of the cutting component for dependable equipment operation. Installed within the cutting deck, the spindle assembly connects the blade to the drive system and allows the blade to rotate as power is transferred through the pulley and belt. Proper spindle operation helps maintain blade alignment and consiste... https://www.wholetoolbox.com/dewalt-1004685-00-spindle-assembly/1004685-00.html