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 Torsion Spring
Model Number: 40-50-1480
The Milwaukee 40-50-1480 is a genuine OEM Torsion Spring for use in Milwaukee angle grinders. A torsion spring stores energy by twisting rather than by compressing or extending, and it applies a rotational return force to the component it works against. In a grinder, a torsion spring like this typically serves as the return spring in the paddle switch and lock-off mechanism: it provides the force that returns the paddle trigger or lock-off lever to its resting, off position when the operator releases it, so the tool shuts off reliably and the switch returns for the next use. The spring's rate, wire diameter, and leg geometry are all critical to correct function, so an incorrect spring can cause the paddle or lock-off to feel wrong, fail to return, or actuate improperly even if it physically fits. Because the spring is cycled every time the tool is triggered, it is a wear component: over time it can fatigue, take a set, or break, at which point the paddle or lock-off may not return properly. Replacing it with the correct genuine Milwaukee OEM torsion spring restores proper, reliable switch return and operation.
Because Milwaukee Tool specifies replacement parts by both catalog number and serial number, and because springs are specific to the exact mechanism they serve, always verify your tool's serial number against the official Milwaukee service parts diagram before ordering to confirm this is the correct torsion spring for your grinder and its switch mechanism. Do not order by appearance, since torsion springs that look similar can differ in rate, wire diameter, and leg orientation, and the diagram is what confirms the correct part. A torsion spring that has been removed or distorted during disassembly should be replaced rather than reused, since a spring that has lost its temper will not return the mechanism properly. The paddle trigger, lock-off lever and pin, and related switch components that work with this spring 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 lock-off mechanism when replacing the spring since these parts work together.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Torsion Spring for use in Milwaukee angle grinders
- Stores energy by twisting to apply a rotational return force
- Typically the return spring in the paddle switch and lock-off mechanism
- Returns the paddle or lock-off lever to its off position on release
- Helps the tool shut off reliably and the switch return for the next use
- Spring rate, wire diameter, and leg geometry are critical to correct function
- Restores proper switch return when the original fatigues or breaks
- A wear component cycled every time the tool is triggered
- Manufactured to Milwaukee specification for the correct force and fit
- Order by exact catalog number, since similar-looking springs differ
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 40-50-1480
- Official Description: Torsion Spring
- Component Type: Return torsion spring
- Function: Applies rotational return force in the grinder switch mechanism
- Primary Fitment: Milwaukee angle grinders - verify by model and serial number
- 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, quantity per tool varies by model
- Part Type: Genuine Milwaukee OEM Replacement Part
Includes
- (1) Milwaukee 40-50-1480 Torsion Spring
The paddle trigger, lock-off lever, lock-off pin, and related switch components that work with this spring 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.
