Abstract: A timing gear belt and pulley drive apparatus for a precision winder characterized by permitting a change in wind ratios by varying the speed ratio between the winder traverse assembly and the winder chuck assembly without the removal and replacement of gear pulleys. The precision winder drive apparatus comprises a drive motor for driving the chuck assembly and traverse assembly of the winder off of a common motor drive shaft. A plurality of concentric, differently toothed drive gears are mounted for rotation on the motor drive shaft for driving one of the chuck assembly or traverse assembly. A plurality of concentric, differently toothed driven gears are mounted on one of the chuck assembly or traverse assembly in belt drive alignment with the drive gears mounted on the motor drive shaft. A drive gear is mounted for rotation on the motor drive for driving a driven gear on the other of the chuck or traverse assembly.