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The Milwaukee 22-20-0691 is a genuine OEM Left Brush Holder designed for industrial brushed motor assemblies. This handed component functions as a structural enclosure within the motor's stator ring or brush card, specifically engineered to hold, align, and maintain mechanical and electrical stability for the left-side carbon brush. It ensures the correct brush-to-commutator contact angle and maintains consistent spring pressure to prevent electrical arcing and uneven wear. The assembly consists of a metal guide sleeve for thermal dissipation and a dielectric insulating base to isolate the brush from the tool's conductive housing.
Features
Asymmetric Handed Design: Engineered exclusively for left-hand orientation to eliminate timing skew and ensure precise contact angles.
Integral Spring Traps and Posts: Features a dedicated retention post and Y-shaped structural wall to secure torsion springs and maintain consistent force.
High Vibration Damping: Heavy brass walls reduce mechanical chatter and minimize radio frequency interference (RFI).
Direct Spade Terminal Connection: Integrated male spade layout allows for solderless maintenance and reduced electrical resistance.
Thermal Dissipation: Brass alloy construction draws arc-generated heat away from the carbon brush.
Dielectric Isolation: Specialized polymer matrix maintains high dielectric strength under voltage surges or motor stalls.
Installation Protocol: Requires power isolation, housing separation, and specific brush pre-loading to prevent commutator scoring during assembly.
Specifications
Manufacturer: Milwaukee Electric Tool Corporation
Part Number (MPN): 22-20-0691
Component Classification: Handed Sub-Assembly (Left-Hand Side Only)
Material Composition: Extruded Structural Brass Alloy (Sleeve) and High-Density Thermoset Phenolic Polymer or Glass-Reinforced Nylon (Base)
Gross Weight: 0.02 lbs (9.07 grams)
Electrical Interface: 0.195" (Width) x 0.035" Male Spade Terminal
