Automatic Speed Change technology adjusts speed and torque during operation for optimum performance

Electronic RPM controller turns the motor off if rotation speed suddenly slows or wheel is forced to stop

The Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life; delivers 8,500 RPM

Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge

The electronically-controlled BL Brushless Motor efficiently uses energy to match torque and RPM to the changing demands of the application

Compact and ergonomic design at only 14-1/4" long

Weighs only 5.6 lbs. with battery for reduced operator fatigue

Rubberized soft grip provides increased comfort on the job

3-stage L.E.D. gauge indicates battery charge level

Soft start suppresses start-up reaction for smooth start-ups and longer gear life

Spiral bevel gears for smoother rotations and a more efficient transfer of energy

Efficient internal cooling is engineered for optimum performance

Wire mesh intake covers are engineered to prevent debris from entering motor

Features Extreme Protection Technology (XPT) which is engineered to provide increased dust and water resistance in harsh job site conditions.

18V LXT Lithium-Ion 4.0 Ah battery BL1840B features an integrated L.E.D. battery charge level indicator

18V LXT Lithium-Ion 4.0Ah battery BL1840B provides up to 35% more run time per charge*

18V LXT Lithium-Ion 4.0Ah battery BL1840B reaches a full charge in 40 minutes or less

Equipped with Star Protection Computer Controls to protect against overloading, over-discharging and over-heating

Rapid Optimum Charger communicates with the battery's built-in chip throughout the charging process to optimize battery life by actively controlling current, voltage and temperature

Rapid Optimum Charger has a built-in fan to cool the battery for faster, more efficient charging

The 18V LXT 4.0Ah battery (BL1840B) is compatible only with Star Protection tools, indicated by the Star Symbol and/or Yellow Battery Receiver under the tool

Makita technology delivers category-leading charge time so the battery spends more time working and less time sitting on the charger

Only use genuine Makita batteries and chargers

Corded 4-1/2" Grinder provides a powerful 7.5 AMP Makita-built motor for heavy professional grinding applications

Corded 4-1/2" Grinder features a small diameter barrel grip (only 2-1/2") for added comfort

Corded 4-1/2" Grinder uses labyrinth construction seals and protects the motor and bearings from dust and debris for longer tool life

Corded 4-1/2" Grinder has the ability to lock-on/off for continuous operation

Corded 4-1/2" Grinder also features an AC/DC switch for use with alternative power source

3-year limited warranty on cordless tool, battery and charger

1-year limited warranty on corded tool

*compared to BL1830