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 Lock-Off Button
Model Number: 42-42-0620
The Milwaukee 42-42-0620 is a genuine OEM Lock-Off Button, which Milwaukee also catalogs as a Lock Off Lever, for Milwaukee angle grinders with a paddle switch and lock-off. The lock-off is a safety interlock: it blocks the paddle from being squeezed until the operator deliberately presses the lock-off button or lever, which prevents the grinder from being started accidentally if the paddle is bumped or the tool is set down against the trigger. Only once the lock-off is actuated can the paddle be depressed to run the tool. It is important not to confuse a lock-off with a lock-on: a lock-off, like this part, is a safety feature that prevents accidental startup, whereas a lock-on button holds the paddle engaged for continuous running. Because the lock-off button is actuated on every use and is a molded component exposed on the tool, it is a wear and breakage item: when it is cracked, stuck, or broken, the lock-off safety function may fail to release the paddle or fail to reset. Replacing it with the correct genuine Milwaukee OEM lock-off button restores proper, reliable operation of the grinder's safety interlock.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, always verify your tool's serial number against the official Milwaukee service parts diagram before placing your order, since running production changes can alter part compatibility within the same catalog number. This lock-off button is documented on the service parts lists for Milwaukee angle grinders with paddle switch and lock-off, such as the 6116-31 and related 4.5 in. and 5 in. grinders, so confirm your tool's catalog and serial number against the parts diagram before ordering. The paddle trigger, torsion spring, lock-off pin, and related switch components that work with the lock-off button are separate parts that vary by tool, so refer to your tool's parts diagram for the correct companion part numbers, and inspect the paddle and switch mechanism when replacing the button since these parts work together.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Lock-Off Button, also cataloged by Milwaukee as a Lock Off Lever
- For Milwaukee angle grinders with a paddle switch and lock-off
- Safety interlock that blocks the paddle until deliberately actuated
- Prevents the grinder from being started accidentally
- A lock-off safety button, distinct from a lock-on button
- Restores proper lock-off operation when the original is cracked or stuck
- Common wear and breakage item, actuated on every use
- Documented on 4.5 in. and 5 in. paddle-switch grinders such as the 6116-31
- Manufactured to Milwaukee specification for correct fit and function
- Paddle trigger, spring, and lock-off pin are separate parts, sold separately
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 42-42-0620
- Official Description: Lock Off Lever (Lock-Off Button)
- Component Type: Paddle switch lock-off safety interlock
- Function: Blocks the paddle until actuated to prevent accidental startup
- Primary Fitment: Milwaukee 4.5 in. and 5 in. angle grinders with paddle switch and lock-off, such as the 6116-31
- Also Referenced On: Verify additional applications using Milwaukee's online parts lookup
- Parts Diagram Position: Verify the figure and bulletin number on Milwaukee's online parts lookup
- Quantity: Sold individually, (1) required per tool
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 42-42-0620 Lock-Off Button
The paddle trigger, torsion spring, lock-off pin, and related switch components that work with the lock-off button are NOT included, vary by tool, and are sold separately - refer to your tool's parts diagram for the correct part numbers and quantities. Always verify by serial number using Milwaukee's online parts lookup before ordering.
