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 Lock Button Spring
Model Number: 40-50-1155
The Milwaukee 40-50-1155 is a genuine OEM Lock Button Spring for use in compatible Milwaukee tools. The lock button spring provides the return force behind the spindle lock button or tool lock button — pushing the button back to its disengaged (out) position after the operator releases it, so the lock pin withdraws from the spindle engagement slot and the spindle is free to rotate during tool operation. The spring must be strong enough to positively return the button and fully retract the lock pin after each use, but not so stiff that it requires excessive force to depress. A broken or fatigued lock button spring that fails to return the button fully — leaving the lock pin partially engaged with the spindle — creates a dangerous condition where the spindle cannot rotate freely during operation. Immediate replacement is required to restore safe tool operation.
Using a genuine Milwaukee OEM lock button spring ensures the correct spring rate, wire diameter, and free length for the lock button mechanism 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 lock button spring for compatible Milwaukee tools
- Returns the spindle lock button to the disengaged position after each use
- Fully retracts the lock pin so the spindle rotates freely during tool operation
- A failed lock button spring is a safety hazard requiring immediate replacement
- Verify catalog number and serial number on Milwaukee's website before ordering
Specifications
- Type: Lock Button Spring
- Material: Spring Steel
- Application: Spindle Lock Button Return Force
- Compatibility: Always verify part compatibility using your tool's model and serial number before ordering
Includes
- (1) Milwaukee 40-50-1155 Lock Button Spring
