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The Milwaukee 38-50-6400 is a genuine OEM precision-machined reciprocating spindle assembly designed for Milwaukee Sawzall® reciprocating saws. It functions as the output shaft, serving as the rotating component that transmits final torque and speed from the gearcase to the chuck, accessory, or drive interface. This hardened steel shaft is ground to tight tolerances to ensure accurate, concentric tool rotation and correct accessory retention.
Features
Genuine OEM Milwaukee replacement part
Precision ground to tight tolerances for accurate, concentric tool rotation
Transmits final torque and speed from the gearcase to the tool output interface
Maintains precise dimensional tolerances at bearing journals, thread form, and output interface
Eliminates run-out and vibration when original spindle is worn, bent, or damaged
Restores correct tool output geometry and safe operation
Specifications
Manufacturer: Milwaukee Electric Tool Corp
MPN: 38-50-6400
Type: Spindle (Output Shaft)
Material: Hardened Steel
Construction: Precision-machined and ground
Interface: Gearcase to blade/chuck
Tolerance: Precision ground bearing journals and thread forms
Applications
Used in Milwaukee 6520-21 1 1/8" stroke Sawzall®
Used in Milwaukee 6538-21 1 1/4" stroke Sawzall®
Used in Milwaukee 6523-21 Sawzall®
Used in Milwaukee 6536-21 1 1/4" stroke Sawzall®
Used in Milwaukee 6520-21 12 A orbital Sawzall® reciprocating saw
Final torque and speed transmission to tool output interface
