Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukees website please click here:
Milwaukee Brush Holder Spring
Model Number: 40-50-7770
The Milwaukee 40-50-7770 is a genuine OEM Brush Holder Spring for use in compatible Milwaukee brushed motor tools. The brush holder spring is the spring within the carbon brush holder that provides constant, calibrated pressure to push the carbon brush firmly against the armature commutator surface throughout the brush's entire service life. As the carbon brush gradually wears down through normal use, the spring maintains consistent contact force so that electrical contact quality remains constant regardless of remaining brush length. A fatigued, collapsed, or broken brush holder spring that can no longer maintain adequate brush pressure against the commutator causes intermittent electrical contact, increased arcing, and accelerated commutator wear — requiring replacement to restore correct, consistent brush contact pressure.
Using a genuine Milwaukee OEM brush holder spring ensures the correct spring rate and dimensions for the brush holder it serves. Always verify your catalog number and serial number on Milwaukee's website before ordering to confirm this is the correct spring for your specific unit.
Features
- Genuine Milwaukee OEM brush holder spring for compatible Milwaukee brushed motor tools
- Provides constant pressure to keep the carbon brush firmly in contact with the commutator
- Maintains consistent contact force as the brush gradually wears down through use
- Replacement restores consistent brush contact when original spring fatigues or collapses
- Verify catalog number and serial number on Milwaukee's website before ordering
Specifications
- Type: Brush Holder Spring
- Material: Spring Steel
- Application: Carbon Brush Commutator Contact Pressure Spring for Compatible Milwaukee Tools
- Compatibility: Always verify part compatibility using your tool's model and serial number before ordering
Includes
- (1) Milwaukee 40-50-7770 Brush Holder Spring
