Rotary power tool

A rotary hammer adapted to impart axial impacts to a tool bit, the rotary hammer comprising:

• a housing;
• a first motor supported by the housing and defining a first motor axis;
• a second motor supported by the housing and defining a second motor axis that is coaxial with the first motor axis;
• electromagnetic shielding disposed between the first motor and the second motor
• a spindle coupled to the first motor for receiving torque from the first motor, causing the spindle to rotate;
• a reciprocation mechanism operable to create a variable pressure air spring within the spindle, the reciprocation mechanism including
• a piston configured to reciprocate within the spindle in response to receiving torque from the second motor,
• a striker that is selectively reciprocable within the spindle in response to reciprocation of the piston, and
• an anvil that is impacted by the striker when the striker reciprocates towards the tool bit, the anvil imparting axial impacts to the tool bit,
• wherein the first motor includes a first stator core having first windings, wherein the second motor includes a second stator core having second windings, and wherein the electromagnetic shielding is disposed between the first windings and the second windings.

A rotary hammer adapted to impart axial impacts to a tool bit, the rotary hammer comprising:

• a housing;
• a first motor supported by the housing and defining a first motor axis;
• a second motor supported by the housing and defining a second motor axis that is coaxial with the first motor axis;
• electromagnetic shielding disposed between the first motor and the second motor;
• a spindle coupled to the first motor for receiving torque from the first motor, causing the spindle to rotate;
• a reciprocation mechanism operable to create a variable pressure air spring within the spindle, the reciprocation mechanism including
• a piston configured to reciprocate within the spindle in response to receiving torque from the second motor,
• a striker that is selectively reciprocable within the spindle in response to reciprocation of the piston, and
• an anvil that is impacted by the striker when the striker reciprocates towards the tool bit, the anvil imparting axial impacts to the tool bit,
• wherein the first motor includes a first stator core, wherein the second motor includes a second stator core, and wherein the first stator core and the second stator core are formed together as a single staged stator.