316046800 - Metabo W9-115 Replacement Carbon Brush Set

Technical Overview of Metabo 316046800 Carbon Brushes

The Metabo 316046800 Carbon Brush Set is a critical maintenance component engineered specifically for the W9-115 series of angle grinders. In universal series motors, such as those found in professional-grade power tools, carbon brushes play a pivotal role in conducting electrical current between the stationary wires and the rotating wires of the motor via the commutator. Over time, the friction generated during operation causes the soft carbon material to wear down. This is a normal and expected part of the tool's lifecycle, but using high-quality replacements is essential for maintaining the longevity of the motor.

This genuine OEM set is manufactured to Metabo's precise specifications regarding hardness, conductivity, and dimensions. One of the most significant technical features of these brushes is the integrated "auto-stop" mechanism. In cheaper, aftermarket brushes, the carbon can wear down until the metal spring or holder contacts the commutator, causing catastrophic damage to the armature. The Metabo 316046800 set includes a spring-loaded pin or cut-out tab that automatically breaks the electrical circuit once the carbon wears to a safe minimum length. This immediately cuts power to the motor, preventing operation with insufficient brush contact and protecting the expensive commutator segments from arcing and scoring.

Replacing the brushes is a straightforward procedure that restores the tool's torque and efficiency. Symptoms of worn brushes include intermittent operation, loss of power under load, or excessive sparking visible through the housing vents. By installing this specific part number, technicians ensure that the spring tension is calibrated correctly for the W9-115 armature, preventing premature wear or bouncing which can lead to overheating. This set includes two brushes, as it is mandatory to replace both simultaneously to ensure even wear and balanced electrical performance.

For industrial MRO environments, stocking these brushes is a proactive measure. The W9-115 is a workhorse in metal fabrication, and brush failure is the most common reason for downtime. Having the 316046800 set on hand allows for immediate repair, ensuring that production schedules are not impacted by a simple maintenance requirement.