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: 40-50-0161
The Milwaukee 40-50-0161 is a genuine OEM Torsion Spring for the tool-free blade clamp mechanism on Milwaukee reciprocating saws and HACKZALL saws. A torsion spring stores energy by twisting rather than compressing or extending, and in the QUIK-LOK style blade clamp on these saws it provides the rotational spring force that drives the clamp. The blade is gripped and released without tools by a mechanism built around this torsion spring, a spring cover, cams, a lock pin, and a sleeve on the spindle: the torsion spring supplies the tension that holds the clamp closed on a blade and returns the mechanism when the operator rotates the clamp to change blades. The spring's rate, wire diameter, and leg geometry are all critical to correct function, so an incorrect spring can cause the blade clamp to feel wrong, fail to grip the blade securely, or fail to release. Because the spring is cycled every time a blade is changed and loaded whenever the clamp holds a blade, it is a wear component: over time it can fatigue, take a set, or break, at which point the blade clamp may not hold or release the blade properly. Replacing it with the correct genuine Milwaukee OEM torsion spring restores proper, reliable tool-free blade clamp 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 tool. This torsion spring is a common part used across a range of Milwaukee reciprocating saws and HACKZALL saws with the QUIK-LOK blade clamp, so confirm your tool's catalog and serial number against the parts diagram before ordering. Do not order by appearance, since torsion springs that look similar can differ in rate and leg orientation. A 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 drive the clamp properly. The spring cover, ordered separately as 31-15-0511, the front and rear cams, the lock pin, and the sleeve that make up the blade clamp assembly are separate parts, so refer to your tool's parts diagram for the correct companion part numbers, and follow the correct service sequence when reassembling the clamp.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Torsion Spring for the tool-free blade clamp mechanism
- For Milwaukee SAWZALL reciprocating saws and HACKZALL saws
- Stores energy by twisting to drive the QUIK-LOK style blade clamp
- Provides the tension that holds the clamp closed on a blade
- Returns the mechanism when the operator rotates the clamp to change blades
- Spring rate, wire diameter, and leg geometry are critical to correct function
- Restores proper, reliable blade clamp operation when fatigued or broken
- A wear component cycled every time a blade is changed
- Works with the spring cover (31-15-0511), cams, lock pin, and sleeve
- A common part across many Milwaukee recip saws and HACKZALLs
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 40-50-0161
- Official Description: Torsion Spring
- Component Type: Blade clamp torsion spring
- Function: Drives the tool-free blade clamp to grip and release the blade
- Primary Fitment: Milwaukee SAWZALL and HACKZALL saws with QUIK-LOK blade clamp - verify by model and serial number
- Works With: 31-15-0511 Spring Cover, front and rear cams, lock pin, sleeve
- 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 40-50-0161 Torsion Spring
The spring cover (31-15-0511), front and rear cams, lock pin, sleeve, and other blade clamp components that work with the torsion 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.
