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 Rear Cam
Model Number: 42-50-0077
The Milwaukee 42-50-0077 is a genuine OEM Rear Cam for the tool-free blade clamp mechanism on Milwaukee reciprocating saws and HACKZALL saws. On these saws, the blade is gripped and released without tools by a QUIK-LOK style blade clamp built around a front cam, this rear cam, a torsion spring, a spring cover, a lock pin, and a sleeve on the spindle. The rear cam is one half of the rotating cam pair the operator turns when rotating the blade clamp: as the clamp is turned, the cams act on the lock pin and sleeve to open the clamp for a blade change and then close it to grip the blade securely. The cam surfaces convert the operator's twist of the clamp into the clamping and releasing motion, and the torsion spring works against the rear cam to drive and return that action, with the spring leg seating into a hole in the rear cam. Because the cam is worked on every blade change and its surfaces take the load of the clamping mechanism, it is a wear item: a worn, cracked, or damaged rear cam can cause the blade clamp to feel loose, fail to grip the blade securely, or fail to release. Replacing it with the correct genuine Milwaukee OEM rear cam restores proper, reliable tool-free blade clamp operation.
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 rear cam is 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. The rear cam works together with the front cam, ordered separately as 42-50-0076, the torsion spring (40-50-0161), the spring cover (31-15-0511), the lock pin, and the sleeve that make up the blade clamp assembly, so refer to your tool's parts diagram for the correct companion part numbers. During assembly the rear cam slides over the sleeve until it bottoms and the spring leg inserts into the hole in the rear cam, so follow the correct service sequence, and inspect the front cam, spring, and lock pin when replacing the rear cam since these parts work together in the clamp.
Features
- Genuine Milwaukee OEM service part, not an aftermarket substitute
- Rear Cam for the tool-free blade clamp mechanism
- For Milwaukee SAWZALL reciprocating saws and HACKZALL saws
- One half of the rotating cam pair in the QUIK-LOK blade clamp
- Acts on the lock pin and sleeve to open and close the clamp
- Converts the operator's twist of the clamp into clamping and releasing motion
- Works with the torsion spring, whose leg seats into the rear cam
- Restores proper, reliable blade clamp operation when worn or cracked
- Corrects a clamp that is loose, will not grip, or will not release
- A wear item worked on every blade change
- Works with the front cam (42-50-0076), torsion spring, spring cover, and lock pin
- Verify catalog number and serial number before ordering
Specifications
- Manufacturer: Milwaukee Tool
- Part Number: 42-50-0077
- Official Description: Rear Cam
- Component Type: Blade clamp cam
- Function: Rotating cam that opens and closes the tool-free blade clamp
- Primary Fitment: Milwaukee SAWZALL and HACKZALL saws with QUIK-LOK blade clamp - verify by model and serial number
- Works With: 42-50-0076 Front Cam, 40-50-0161 Torsion Spring, 31-15-0511 Spring Cover, 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 42-50-0077 Rear Cam
The front cam (42-50-0076), torsion spring (40-50-0161), spring cover (31-15-0511), lock pin, sleeve, and other blade clamp components that work with the rear cam 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.
