Motor assembly for a powered surgical instrument

An assembly for a motorized surgical instrument, the assembly comprising:

• a one-piece base extending along a first longitudinal axis between a first base end and a second base end, the one-piece base comprising:
• at least one transversely extending wall extending substantially perpendicular to the first longitudinal axis towards an interior of the one-piece base,
• a rotor housing chamber defined by the base,
• a first bearing housing defined by the base and located adjacent the rotor housing chamber between the first base end and the at least one of the at least one transversely extending wall,
• a second bearing housing defined by the base and located on an opposite side of the rotor housing chamber from the first bearing housing, and
• a passage defined by the base and operable to direct a pressurized fluid through the base to the rotor housing chamber;
• a first bearing located in the first bearing housing;
• a rotatable shaft located in the rotor housing chamber and engaging the first bearing;
• and
• a second bearing located in the second bearing housing, wherein the rotatable shaft engages the second bearing.

A method for a powered surgical instrument, the method comprising:

• providing a unitarily formed one-piece base extending along a first longitudinal axis from a first base end to a second base end having:
• at least one transverse wall extending substantially perpendicular to the first longitudinal axis,
• a rotor housing chamber,
• a first bearing housing adjacent the rotor housing chamber,
• a passage coupled to the rotor housing chamber,
• a second bearing housing located opposite the rotor housing chamber from the first bearing housing;
• and
• providing a second bearing located in the second bearing housing that engages the rotatable shaft;
• providing a first bearing located in the first bearing housing;
• and
• providing a rotatable shaft located in the rotor housing chamber and engaging the first bearing located in the first bearing housing;
• wherein the rotor housing chamber and the first bearing housing are separated by the at least one transverse wall of the one-piece base.