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 Blade Spring Washer
Model Number: 43-50-0115
The Milwaukee 43-50-0115 is a genuine OEM Blade Spring Washer for the 6577-20 7-1/4 in. Worm Drive Circular Saw. A blade spring washer is a slightly domed, spring-type washer that sits in the blade mounting stack on the spindle, working together with the blade flanges and blade bolt. Its job is to provide spring preload in the clamp: as the blade bolt is tightened, the spring washer flexes and stores a controlled clamping force, which keeps consistent tension on the blade retention system and helps hold the blade securely and true even as the assembly heats and cools and vibrates during heavy cutting. On a powerful 15-amp worm drive saw like the 6577-20, that consistent, spring-loaded clamping is part of what keeps the blade seated correctly under load. Because the spring washer is a loaded component that flexes with every blade installation, it can lose its spring temper, flatten, crack, or corrode over time, at which point it no longer provides the preload the clamp was designed around. Replacing it with the correct genuine Milwaukee OEM spring washer restores proper clamping tension, which is both a performance and a safety matter, since a blade that is not consistently and securely clamped can shift during cutting.
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 blade spring washer is specified for the 6577-20 7-1/4 in. Worm Drive Circular Saw, so confirm your tool's catalog and serial number against the parts diagram before ordering. Note that on this saw the blade screw is left-hand threaded, so it loosens clockwise. The inner and outer blade flanges, blade bolt, and blade are companion parts sold separately, so refer to your tool's parts diagram for the correct part numbers, quantities, and assembly sequence, and inspect the flanges and blade bolt when servicing the blade clamp since these parts work together.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Blade Spring Washer for the 6577-20 7-1/4 in. Worm Drive Circular Saw
- Domed, spring-type washer that provides preload in the blade clamp
- Stores controlled clamping force as the blade bolt is tightened
- Keeps consistent tension on the blade retention system
- Helps hold the blade secure and true under heavy cutting loads
- Restores proper clamping tension when the original loses its spring or flattens
- A loaded component that flexes on every blade installation
- Manufactured to Milwaukee specification for the correct spring force and fit
- Note the blade screw is left-hand threaded on this worm drive saw
- Inner and outer flanges, blade bolt, and blade are companion parts sold separately
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 43-50-0115
- Official Description: Blade Spring Washer
- Component Type: Spring washer for the blade clamp
- Function: Provides spring preload and consistent clamping tension in the blade mount
- Primary Fitment: 6577-20 7-1/4 in. Worm Drive Circular Saw
- 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 43-50-0115 Blade Spring Washer
The inner and outer blade flanges, blade bolt, and saw blade are NOT included, vary by tool, and are sold separately - refer to your tool's parts diagram for the correct part numbers and quantities. Note the blade screw is left-hand threaded. Always verify by serial number using Milwaukee's online parts lookup before ordering.
