The field coil in a 2-26 rotary hammer (such as the Bosch GBH 2-26) is a crucial component of the electric motor, which drives the machine. The field coil generates a magnetic field when current passes through it, which interacts with the rotor (or armature) to produce rotational motion. This rotational energy is then converted into the hammering and drilling actions in the rotary hammer.

Here’s how the field coil functions in a rotary hammer:

Magnetic Field Creation: The field coil, made of wire windings, produces a magnetic field when the machine is turned on and electrical current flows through it.

Interaction with the Rotor: This magnetic field interacts with the armature or rotor (another part of the motor), which is also connected to a power source. The interaction between the magnetic field from the field coil and the armature causes the rotor to spin.

Powering the Hammer Mechanism: The rotation of the rotor drives the mechanical components of the rotary hammer, such as the piston and gear system. In turn, this provides both the rotational motion for drilling and the hammering force needed to break through hard materials like concrete.

Without the field coil, the motor in the hammer machine wouldn’t be able to generate the required rotation, and the machine wouldn’t function. Field coils are subject to wear and tear over time, especially in heavy-duty applications, so they may need replacement if the motor fails or performance degrades.