A motorized deadbolt cylinder
assembly includes a housing having a generally cylindrical side wall, a generally planar outer end wall disposed at a first end of the side wall and a generally planar inner end wall disposed at a second end of the side wall opposite to the first end. The
assembly also includes a motor disposed within the housing, the motor having a
drive shaft, and a
cam arranged on the inner end wall and arranged such that at least a portion thereof is disposed outside of the housing. A
gear train is operably connected between the
drive shaft of the motor and the
cam such that rotation of the
drive shaft of the motor causes rotation of the
cam, such that the cam rotates with an increase in
mechanical advantage as compared to rotation of the drive shaft of the motor.