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 Spring for Torque Key
Model Number: 40-50-0066
The Milwaukee 40-50-0066 is a genuine OEM Spring for Torque Key, the spring that works within the tool's torque adjustment mechanism. On a drill/driver or similar tool with an adjustable clutch, the operator sets the torque by turning the torque collar or key, and a spring provides the tension the mechanism needs to hold each setting positively and to return the mechanism as it is adjusted. This spring supplies that force in the torque key assembly, giving the detent tension that keeps the selected torque setting in place and the consistent feel the adjustment is designed around. The spring's rate, free length, and wire diameter are all critical to correct function, so an incorrect spring can cause the torque settings to feel wrong, drift, or fail to hold even if the spring physically fits. Because the spring is worked every time the torque is adjusted, it is a wear component: over time it can fatigue, take a set, or break, at which point the torque adjustment may no longer hold its setting or index correctly. Replacing it with the correct genuine Milwaukee OEM spring restores proper, reliable torque adjustment.
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 spring for your tool and its torque key mechanism. Do not order by appearance, since springs that look similar can differ in rate and free length, and the diagram is what confirms the correct part. 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 hold the mechanism properly. The torque key or collar, the clutch components, and related parts 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 torque mechanism when replacing the spring since these parts work together.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Spring for Torque Key, the spring in the torque adjustment mechanism
- Provides the tension that holds each torque or clutch setting
- Gives the detent force and consistent feel the adjustment is designed around
- Returns the torque key mechanism as it is adjusted
- Spring rate, free length, and wire diameter are critical to correct function
- Restores proper torque adjustment when the original fatigues or breaks
- A wear component worked every time the torque is set
- Manufactured to Milwaukee specification for the correct force and fit
- Order by exact catalog number, since similar-looking springs differ
- The torque key, collar, and clutch parts are separate parts, sold separately
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 40-50-0066
- Official Description: Spring for Torque Key
- Component Type: Torque adjustment mechanism spring
- Function: Provides tension and return force in the torque key mechanism
- Primary Fitment: Verify by catalog and serial number on the parts diagram
- 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 40-50-0066 Spring for Torque Key
The torque key or collar, the clutch components, and related parts 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.
