Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukee's website please click here:
Milwaukee Right Brush Spring
Model Number: 40-50-2170
The Milwaukee 40-50-2170 is a genuine OEM Right Brush Spring for compatible Milwaukee brushed power tools — the spring that applies the calibrated contact force to the right-side carbon brush, maintaining the correct pressure between the brush face and the rotating armature commutator throughout the brush's service life. The brush spring is the component that keeps the carbon brush in continuous electrical contact with the commutator — the spring must maintain the designed contact pressure throughout the full range of brush travel from the new brush position to the worn brush position at the end of its service life. If the brush spring fatigues, breaks, or deforms beyond its elastic range from the heat and repeated compression cycles of sustained motor operation, the brush contact pressure changes from the designed specification — too little contact pressure causes arcing and intermittent power delivery, too much causes excess friction and accelerated commutator wear.
The right designation indicates this spring serves the right-side brush position in the tool's carbon brush assembly — the left and right brush springs may have different specifications or orientations in some Milwaukee motor designs, making the correct side-specific designation important for proper service. Using a genuine Milwaukee OEM brush spring ensures the correct spring rate, wire diameter, free length, and orientation for the specific Milwaukee tool model's right brush position. Always verify your specific Milwaukee tool model number and serial number at milwaukeetool.com before ordering brush spring components.
Features
- Genuine Milwaukee OEM right brush spring for compatible Milwaukee brushed tools
- Maintains calibrated brush contact pressure throughout full brush service life
- Right designation — verify correct side-specific spring for your tool's brush assembly
- Replace when spring fatigues, breaks, or causes arcing or contact pressure issues
- Verify tool model and serial number at milwaukeetool.com before ordering
Specifications
- Type: Right Brush Spring
- Compatible Tools: Milwaukee Brushed Power Tools (verify model and serial number)
Includes
- (1) Milwaukee 40-50-2170 Right Brush Spring
