Hydraulic tool pump

A power tool comprising:

• a housing;
• a hydraulic actuator supported by the housing and including a cylinder and a ram movably disposed within the cylinder;
• a tank positioned in the housing and fluidly coupled to the hydraulic actuator;
• a pump positioned in the housing, the pump including:
• a pump body defining a piston chamber, an inlet passage coupled between the tank and the piston chamber, and an outlet passage coupled to the piston chamber,
• a piston movably disposed within the piston chamber,
• a camshaft rotatably supported by the pump body, the camshaft including a cam, an inner bearing made of a first material and sleeved on the cam, and an outer bearing made of a second material that is different from the first material and sleeved on the inner bearing so that the inner bearing is between the outer bearing and the cam, and
• a biasing member positioned between the piston and the pump body to bias the piston into contact with the outer bearing so that the piston oscillates within the piston chamber in response to rotation of the cam;
• and
• a motor coupled to the camshaft to rotate the camshaft.

A power tool comprising:

• a housing;
• a hydraulic actuator supported by the housing and including a cylinder and a ram movably disposed within the cylinder;
• a tank positioned in the housing and fluidly coupled to the hydraulic actuator;
• a pump positioned in the housing, the pump including:
• a pump body defining a piston chamber, an inlet passage coupled between the tank and the piston chamber, and an outlet passage coupled to the piston chamber, the piston chamber is disposed within the tank and the inlet passage and the outlet passage include a cartridge valve,
• a piston movably disposed within the piston chamber, the piston including a retainer coupled to an end of the piston,
• a camshaft rotatably supported by the pump body, the camshaft including a cam, an inner bearing made of a first material and sleeved on the cam, and an outer bearing made of a second material that is different from the first material and sleeved on the inner bearing so that the inner bearing is between the outer bearing and the cam, and
• a biasing member positioned between the retainer and the pump body to bias the piston into contact with the outer bearing so that the piston oscillates within the piston chamber in response to rotation of the cam;
• and
• a motor coupled to the camshaft to rotate the camshaft.