Description
Overview:
The Makita Woodruff Key 4-8 (MPN: 254011-9) is a small, semi-circular steel key used to lock rotating parts to a shaft. It sits in a machined keyway, preventing slippage under load and keeping components aligned for smooth, reliable running. This genuine Makita part is designed for use in a wide range of Makita power tools, especially angle grinders such as the 9553NB and 9554NB, where it typically secures gears or spindles to the motor shaft. The 4-8 designation matches the Makita specification for the mating keyway and shaft, ensuring a precise fit. Built from durable steel with a simple half‐moon profile, it is a common service item that restores proper engagement when the original key is worn, damaged, or missing.
Key Features:
- Genuine Makita OEM part for assured compatibility and performance (MPN: 254011-9)
- Steel construction for wear resistance and dependable torque transmission
- Half‐moon profile seats securely in the keyway and resists rotational slip
- Precisely matched 4-8 size to suit Makita shafts and keyways in listed tools
- Helps maintain gear, spindle, or pulley alignment under heavy use
- Quick to fit during routine maintenance with basic hand tools
- Suitable for both corded and cordless Makita models shown below
- Replaces worn or lost keys to restore safe, smooth tool operation
- Alternative reference: 2540119 for parts cross-checking
Typical Applications:
Securing gears, spindles, pulleys, or flywheels to a motor shaft in Makita tools, preventing rotation between the shaft and component. Common during gearbox, armature, or spindle servicing on angle grinders and other machines. Used after repairs, rebuilds, or when vibration or wear has loosened the original key.
Also known as:
Half‐moon key, shaft key, keyway key, machine key, drive key, flywheel key, motor shaft key, semicircular key.
Fits Models:
5603R, 5703R, 5801B, 6402, 8411D, 9553NB, 9554NB, 9555NB, 9556NB, 9556PB, 9557NB, 9557PB, 9558NB, 9558NBR, 9558PB, BGA450, BGA452, GA7010C, GA9010C, HP1300S, LS0810, SA7000C, SR1600
Alternate Part Numbers:
2540119
Product Specifications
| L&S Part No. | 254011-9 |
|---|---|
| Part Type | Genuine Part |
| Manufacturer | Makita |
| OEM No. | 254011-9 |
| Unit of Sale | 1 |
| Applications | 5603R, 5703R, 5801B, 6402, 8411D, 9553NB, 9554NB, 9555NB, 9556NB, 9556PB, 9557NB, 9557PB, 9558NB, 9558NBR, 9558PB, BGA450, BGA452, GA7010C, GA9010C, HP1300S, LS0810, SA7000C, SR1600 |
| Machine Type | Angle Grinder |
| Fits Brands | Makita |
| Fits Models | HP1300S | 6402 | 8411D | BGA450 | BGA452 | 9553NB | 9554NB | 9555NB | 9556NB | 9556PB | 9557NB | 9557PB | 9558PB | GA7010C | GA9010C | SA7000C | LS0810 | 5603R | 5703R | 5801B | SR1600 | SA7000C | 9558NB | 9558NBR |
