Product Description
**Milwaukee parts change not only by model# but also by serial number. To look up your tools parts break down on Milwaukees website please click here:
Milwaukee 5/8 in. Spindle Hub Assembly — 4.22 Ratio
Model Number: 14-73-0430
The Milwaukee 14-73-0430 is a genuine OEM 5/8 in. Spindle Hub Assembly with a 4.22:1 gear ratio for use in compatible Milwaukee angle grinders. The spindle hub assembly is the complete output drive unit of the grinder — integrating the spiral bevel gear, ball bearing, spindle hub, and 5/8 in. output spindle into a single assembled unit that transmits motor torque through the right-angle bevel gear mesh to the 5/8-11 threaded output spindle at a 4.22:1 reduction ratio. This assembly defines both the output speed (as a fraction of motor RPM) and the output torque multiplication of the grinder. A worn, chipped, or damaged spindle hub assembly that produces grinding noise, vibration, excessive spindle play, or loss of drive requires replacement to restore full grinding performance and safe spindle retention of abrasive wheels.
Using a genuine Milwaukee OEM spindle hub assembly ensures the correct bevel gear mesh, bearing fit, spindle thread, and gear ratio for the grinder it serves. Always verify your catalog number and serial number on Milwaukee's website before ordering to confirm this is the correct assembly for your specific unit.
Features
- Genuine Milwaukee OEM 5/8 in. spindle hub assembly for compatible Milwaukee angle grinders
- Integrates spiral bevel gear, bearing, spindle hub, and 5/8 in. output spindle in one assembly
- 4.22:1 gear ratio reduces motor speed and multiplies torque through the right-angle bevel drive
- Replacement restores smooth drive and correct spindle geometry when original assembly is worn
- Verify catalog number and serial number on Milwaukee's website before ordering
Specifications
- Type: Spindle Hub Assembly
- Output Spindle Size: 5/8 in. (5/8-11 Thread)
- Gear Ratio: 4.22:1
- Drive Type: Spiral Bevel Gear (Right Angle)
- Application: Output Drive Assembly on Compatible Milwaukee Angle Grinders
- Compatibility: Always verify part compatibility using your tool's model and serial number before ordering
Includes
- (1) Milwaukee 14-73-0430 5/8 in. Spindle Hub Assembly — 4.22 Ratio
