Makita Genuine 638396-5 Yoke Unit fits Makita BTD130F BTD134 BTD140 Impact Driver

The Makita Genuine Yoke Unit (MPN 638396-5) is a motor field and stator assembly designed to restore correct electrical performance in compatible Makita impact drivers, including the BTD130F, BTD134, and BTD140. As the core component that surrounds the armature and generates the magnetic field driving the motor, the yoke unit plays a critical role in delivering consistent torque and speed. When the original unit becomes worn or damaged, performance degradation is often gradual — reduced power, i