The second integral part of the motor (along with the armature), the field is a round, ring-like electromagnet made of copper windings (through which current flows) and magnets, and surrounds the armature. It creates a magnetic field and works with the armature to drive the motor. Most of the time, the field is damaged due to overuse/overheating or due to a defective armature.
This item fits the following models:
15-pc Thunderbolt Black Oxide Drill Bit Set
1/4" x 50 Ft Noodle Air Hose with Coupler and Plug