Makita XAG04Z 18V LXT Brushless 4-1/2 / 5in Grinder - Cordless Power

In this review of the Makita XAG04Z 18V LXT Brushless 4-1/2 / 5in cut-off and angle grinder, the bottom line is straightforward: this tool delivers corded-level performance for professionals and serious DIYers who need mobility. The reviewer found the unit especially notable for its brushless motor efficiency and intelligent electronics that tune speed and torque automatically, making it a practical choice for cutting, grinding and light sanding where a cord would be cumbersome. It is sold as tool only, so buyers should factor in batteries and a charger.

Key Features

• Automatic Speed Change technology: Adjusts speed and torque during operation so the grinder maintains optimum cutting or grinding performance under varying loads.
• Active Feedback-sensing Technology (AFT): Shuts the motor off if the wheel is suddenly forced to stop, increasing operator safety in kickback or binding events.
• BL Brushless Motor: Eliminates carbon brushes to run cooler and more efficiently, which helps extend tool life and reduce maintenance.
• Extended run time per charge: The electronically controlled brushless motor optimizes battery use for up to around 50% longer run time per charge compared with non-brushless designs.
• 18V LXT system compatibility: Works with Makita 18V slide-style batteries so users with that ecosystem can share battery packs across tools.

Who It's For

The XAG04Z is aimed at tradespeople and advanced DIYers who need a portable grinder with near-corded performance for cutting tile, concrete, pipe, conduit and general grinding work. Its safety features and automatic speed adjustment make it suited to jobsite use where unpredictable loads are common.

Those who should look elsewhere include buyers who need a complete kit out of the box, since this listing is tool only and requires a compatible 18V battery and charger. If the work requires exceptionally long continuous runtime without battery swaps, a corded grinder may still be preferable.

Pros & Cons

Pros

• Strong, efficient brushless motor that extends runtime and service life compared with brushed designs.
• Automatic Speed Change delivers consistent cutting and grinding performance as load varies.
• AFT safety cutoff provides an important protection layer if the wheel binds or stalls.
• Lightweight and portable for use in tight spaces where corded tools are inconvenient.

Cons

• Sold as tool only, so battery and charger are additional purchases.
• Some customers report mixed battery life results depending on battery capacity and application, with heavier cuts draining packs quickly.

Specifications

Model	XAG04Z (tool only)
Battery platform	18V LXT Lithium-Ion slide-style
Disc size	4-1/2 in / 5 in
Motor type	BL Brushless Motor
Safety features	Active Feedback-sensing Technology (AFT)
Adaptive tech	Automatic Speed Change technology

Our Verdict

The Makita XAG04Z is a smart choice for professionals and serious DIY users who value portability without sacrificing cutting power. Its brushless motor, automatic speed control and AFT safety make it good value when paired with a compatible 18V battery system, though buyers should budget for batteries and charger separately.

Frequently Asked Questions

Does this grinder include a battery and charger?
This listing is tool only; battery and charger are sold separately and you will need a compatible Makita 18V LXT slide-style pack.

What safety features does it have?
It includes Active Feedback-sensing Technology (AFT) which cuts power if the wheel suddenly stops, reducing risk from kickback or binding.

What applications is it best for?
It is well suited for cutting and grinding tile, concrete, pipe and conduit as well as light sanding where cordless convenience is important.