8 Best Cordless Die Grinders (October 2026)
The best cordless die grinders include the DEWALT DCG426B 20V MAX Variable Speed Die Grinder for variable-speed control, the Milwaukee 2486-20 M12 FUEL Die Grinder for a light straight tool, and the Milwaukee 2784-20 M18 FUEL Die Grinder for M18 grinding work.
On this page (5 sections)
The DEWALT DCG426B is the best cordless die grinder for most buyers, with a variable-speed trigger, brushless motor and speeds up to 25,000 RPM. For tight access, consider a right-angle Milwaukee or RYOBI; for a lighter straight tool, the Milwaukee 2486-20 weighs 1.2 lb.
Cordless die grinders let you move around a workpiece without an air hose. The right pick depends on the shape you need, the speed control you prefer and whether you already own batteries from a compatible platform.
Our picks at a glance
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1
Best for variable-speed controlDEWALT DCG426B 20V MAX Variable Speed Die Grinder
8.9/10 our score
See it on Amazon -
2
Best for a light straight toolMilwaukee 2486-20 M12 FUEL Die Grinder
8.8/10 our score
See it on Amazon -
3
- 4
Check itMilwaukee 3485-20 M12 FUEL Right Angle Die Grinder
Best for right-angle M12 access - 5
Check itMilwaukee 2984-20 M18 FUEL Variable Speed Die Grinder
Best for speed and braking options - 6
Check itMakita XDG02Z 18V LXT Compact Die Grinder
Best for a compact straight grinder - 7
Check itMakita DGD800Z 18V LXT Die Grinder
Best for a long-spindle tool - 8
Check itRYOBI ONE+ HP 18V Right Angle Die Grinder
Best for ONE+ right-angle work
How we chose cordless die grinders
We compared the stated speed, control features, shape, accessory fit and battery platform for each cordless die grinder. Our score weighs specs, features and buyer feedback against what you're shopping for.
A straight tool can be easier to position where there is open access, while a right-angle head may help when the work area is cramped. Battery compatibility also matters: tool-only models can cost more to put to work if you need a new battery and charger.
For a wider overview of die grinder shapes and common jobs, read what a die grinder is used for. If you're weighing air-powered options, see our best pneumatic die grinders guide.
| Product | Best for | Speed | Power | Control | Our score |
|---|---|---|---|---|---|
| DEWALT DCG426B 20V MAX Variable Speed Die Grinder | variable-speed control | Up to 25,000 RPM | 20V MAX cordless | Variable-speed trigger; dual-position rocker switch | 8.9 |
| Milwaukee 2486-20 M12 FUEL Die Grinder | a light straight tool | Up to 24,500 RPM | M12 cordless | 4-mode RPM control and variable-speed trigger | 8.8 |
| Milwaukee 2784-20 M18 FUEL Die Grinder | M18 grinding work | 20,000 RPM | M18 cordless | 8.6 | |
| Milwaukee 3485-20 M12 FUEL Right Angle Die Grinder | right-angle M12 access | M12 cordless | 8.5 | ||
| Milwaukee 2984-20 M18 FUEL Variable Speed Die Grinder | speed and braking options | 20,000 RPM | M18 cordless | Five speeds and paddle switch | 8.4 |
| Makita XDG02Z 18V LXT Compact Die Grinder | a compact straight grinder | 26,000 RPM | 18V LXT cordless | 8.3 | |
| Makita DGD800Z 18V LXT Die Grinder | a long-spindle tool | 18V LXT cordless | 8.2 | ||
| RYOBI ONE+ HP 18V Right Angle Die Grinder | ONE+ right-angle work | Up to 22,000 RPM | ONE+ 18V cordless | 4-mode control and variable-speed trigger | 7.9 |
The best cordless die grinders for different jobs
The DEWALT is the strongest general choice here, while the other tools suit distinct needs such as lighter handling, M18 power or right-angle access. Match the tool's features to the work you do most often.
DEWALT DCG426B 20V MAX Variable Speed Die Grinder: Best for variable-speed control
- Brushless motor
- Up to 25,000 RPM
- Variable-speed trigger
- LEDs at the nose
The variable-speed trigger and nose LEDs suit varied grinding tasks and dim work areas. Its dual-position rocker switch allows multiple handle grasping options.
Pros
- Brushless motor
- Variable-speed trigger
- Nose LEDs
Cons
- Tool only, so battery and charger are separate
The DEWALT DCG426B combines a brushless motor with a variable-speed trigger and speeds up to 25,000 RPM. That range gives you a way to adjust speed as the task changes, rather than relying on a single fixed speed.
LEDs at the nose help illuminate a dim work area. The dual-position rocker switch also allows multiple handle grasping options, which gives you flexibility when positioning the grinder.
This is a tool-only model, so plan for a compatible 20V MAX battery and charger if you don't already have them. Consider the work area and grip position before choosing it over a compact or right-angle tool.
Pick it for general grinding when variable speed and nose lighting matter. For a tighter space, compare it with the right-angle Milwaukee 3485-20 and RYOBI ONE+ HP.
Milwaukee 2486-20 M12 FUEL Die Grinder: Best for a light straight tool
- Straight 1/4 in die grinder
- 4-mode RPM control
- Variable-speed trigger
- 1.2 lb tool weight
This 1.2 lb straight grinder combines four RPM modes with a variable-speed trigger. Its M12 platform can suit buyers who already use compatible batteries.
Pros
- 1.2 lb tool weight
- Four RPM modes
- Variable-speed trigger
Cons
- Straight shape may not fit every tight space
The Milwaukee 2486-20 is the lightest stated tool in this group at 1.2 lb. Its straight 1/4 in design combines a four-mode RPM control with a variable-speed trigger.
Milwaukee says the M12 FUEL grinder is designed to replace pneumatic die grinders. Its cordless format removes the hose and compressor from the immediate work area, and the tool is compatible with the M12 battery platform.
Choose it if you want a light straight grinder and already use M12 batteries. If your work calls for a right-angle head, compare the Milwaukee M12 and M18 die grinders to see how the two formats differ.
Milwaukee 2784-20 M18 FUEL Die Grinder: Best for M18 grinding work
- Brushless motor
- 20,000 RPM
- Fits 1/4 in shank accessories
- Battery sold separately
The 20,000 RPM brushless grinder is designed for carbide burrs and flap wheels up to 3 in. It fits buyers who want a straight M18 tool for surface preparation.
Pros
- Brushless motor
- Fits 1/4 in shank accessories
- Designed for carbide burrs and flap wheels
Cons
- Battery sold separately
The Milwaukee 2784-20 is a straight M18 grinder with a 20,000 RPM brushless motor. It fits 1/4 in shank accessories and is designed for carbide burrs and flap wheels up to 3 in.
This model has a fixed stated speed, so it may suit buyers who want a simpler setup for grinding or surface preparation. Milwaukee says an M18 XC5.0 battery can provide up to 25 minutes of grinding; the battery is not included.
Choose it for M18 battery compatibility and a straight tool for surface work. For a variable-speed M18 option with a brake and paddle switch, consider the Milwaukee 2984-20 below.
Milwaukee 3485-20 M12 FUEL Right Angle Die Grinder: Best for right-angle M12 access
- Right-angle 1/4 in tool
- Brushless motor
- Shadowless LED work light
- Spindle lock
The right-angle head and ergonomic barrel grip are intended for tight spaces. A work light and spindle lock add useful access and accessory-change features.
Pros
- Right-angle shape
- Shadowless LED work light
- Spindle lock
Cons
- M12 battery platform required
The Milwaukee 3485-20 has a right-angle head and a barrel grip designed for use in tight spaces. Its brushless motor, shadowless LED work light and spindle lock give it a focused set of access and accessory-change features.
The spindle lock lets you change accessories with one wrench. The tool is part of Milwaukee's M12 FUEL system, so check that you have a compatible battery before choosing it.
Pick it when a straight grinder is awkward to position around the work. For more context on this particular tool, see our Milwaukee 3485-20 review.
Milwaukee 2984-20 M18 FUEL Variable Speed Die Grinder: Best for speed and braking options
- Five speed settings
- RAPIDSTOP brake
- Paddle switch
- ONE-KEY tracking
Five speed settings let you adjust the tool for an application, while RAPIDSTOP is designed to stop most wheels in less than 2 seconds. The paddle switch supports operation in different positions.
Pros
- Five speed settings
- RAPIDSTOP brake
- ONE-KEY tracking and tool management
Cons
- Battery and charger are not included
The Milwaukee 2984-20 adds five speed settings, a paddle switch and a RAPIDSTOP brake to a brushless M18 die grinder. Milwaukee says the brake stops most wheels in less than 2 seconds.
Its LED work light helps with visibility, while ONE-KEY supports tool tracking and management. The tool fits 1/4 in shank accessories, and its battery and charger are sold separately.
Choose it if you want adjustable speed and a paddle switch in the M18 system. Compare it with the 2784-20 if you prefer a simpler fixed-speed grinder for burrs and flap wheels.
Makita XDG02Z 18V LXT Compact Die Grinder: Best for a compact straight grinder
- Up to 26,000 RPM
- Short-neck design
- Barrel grip with rubberized soft grip
- Battery and charger not included
The short-neck design and barrel grip suit grinding in different orientations. Its slide switch has a lock-on feature for continuous operation.
Pros
- 26,000 RPM motor
- Short-neck design
- Vent slots direct exhaust away from the user
Cons
- Battery and charger not included
Makita's XDG02Z combines a 26,000 RPM motor with a short-neck design. Its barrel grip has a rubberized soft grip, and the slide switch can lock on for continuous operation.
The design includes vent slots intended to direct exhaust air away from the user. It is a tool-only 18V LXT model, so the battery and charger are separate.
Choose it for a compact straight grinder with a higher stated speed than the other straight options here. If a long spindle is more useful for your work, compare it with the Makita DGD800Z.
Makita DGD800Z 18V LXT Die Grinder: Best for a long-spindle tool
- Long grinding spindle
- LED warns of low battery voltage and overload
- Restart lock
- Battery not included
The long spindle is intended to support handling, and a removable plastic cover over the spindle housing serves as an extra handle. Its restart lock prevents accidental start after battery replacement.
Pros
- Long grinding spindle
- Overload and battery warning LED
- Restart lock
Cons
- Battery not included
The Makita DGD800Z has a long grinding spindle and a removable plastic cover over the spindle housing that serves as an extra handle. An LED warns of decreasing battery voltage and overload.
A restart lock helps prevent accidental startup after you replace the battery. The tool is part of Makita's 18V LXT system, but the battery is not included.
Pick it if the long spindle suits the way you position a grinder. The XDG02Z is the alternative when a compact short-neck design is more useful.
RYOBI ONE+ HP 18V Right Angle Die Grinder: Best for ONE+ right-angle work
- Right-angle head
- 4-mode speed control
- Variable-speed trigger
- Part of the ONE+ 18V system
The compact right-angle design is made for tighter workspaces, and its four speed modes pair with a variable-speed trigger. The tool works with RYOBI ONE+ 18V batteries.
Pros
- Right-angle shape
- Four speed modes
- ONE+ battery compatibility
Cons
- Battery and charger are sold separately
The RYOBI ONE+ HP is a right-angle 18V grinder with a brushless motor and four-mode speed control. Its variable-speed trigger offers another way to adjust speed during a task.
The tool works with RYOBI ONE+ 18V batteries, a platform the brand says includes more than 225 tools. The battery and charger are sold separately.
Choose it for right-angle access if you're already on the ONE+ platform. The Milwaukee 3485-20 is another right-angle option, with an M12 battery system and a spindle lock.
How to choose a cordless die grinder
Choose a cordless die grinder by matching its shape and speed control to your work, then check battery compatibility and accessory fit. Those choices affect how easily you can reach the work and start using the tool.
Which cordless die grinder shape fits your work?
A straight grinder is a versatile choice when you can approach the work directly, while a right-angle grinder can help in corners and other tight areas. The Milwaukee 3485-20 and RYOBI ONE+ HP are right-angle tools in this group.
Look at the space around the workpiece, including room for your hand and the tool body. If access is open, compare grip and length instead of assuming that the fastest motor is the best fit.
How much speed control do you need?
Variable-speed triggers and mode settings can help you adjust a grinder to the task. The DEWALT has a variable-speed trigger, while the Milwaukee 2486-20, 2984-20 and RYOBI use multiple speed modes or settings.
The Makita XDG02Z and Milwaukee 2784-20 list fixed maximum speeds. Match the accessory and task to the grinder's instructions, and avoid forcing a wheel or burr into work it isn't made to do.
Which battery platform should you choose?
A cordless grinder is easier to put to work if you already own batteries for its platform. These picks use DEWALT 20V MAX, Milwaukee M12 or M18, Makita 18V LXT, or RYOBI ONE+ 18V batteries.
Several tools are sold without a battery or charger. Confirm what's included and account for the battery you need before settling on a model.
What accessories fit a cordless die grinder?
Accessory fit depends on the tool's collet and the accessory shank. Several grinders here are made for 1/4 in shank accessories, but check the instructions for the exact model and attachment before use.
Use accessories only within their stated limits and intended applications. Wear eye and face protection, keep the work secure and follow the safety instructions for both the grinder and the accessory.
Cordless or pneumatic die grinder?
Choose cordless if moving freely around the work matters more than staying connected to an air supply. A pneumatic grinder may suit a shop that already has a compressor and air lines set up.
The Milwaukee 2486-20 is designed as a cordless alternative to pneumatic die grinders. For a closer look at air-powered options and their features, read our pneumatic die grinder guide.
Which cordless die grinder should you choose?
Choose the DEWALT DCG426B for variable speed and nose LEDs, the Milwaukee 2486-20 for a light straight tool, or a right-angle grinder when access is tight. Pick the battery platform that fits your current tools, then compare the uses and types of die grinders if you need help choosing a shape.
Our top 3 picks at a glance
-
1
Best for variable-speed control
DEWALT DCG426B 20V MAX Variable Speed Die Grinder
8.9/10 our score
See it on Amazon -
2
Best for a light straight tool
Milwaukee 2486-20 M12 FUEL Die Grinder
8.8/10 our score
See it on Amazon -
3
Frequently asked questions
What is the best cordless die grinder for most buyers?
The DEWALT DCG426B is a strong general pick because it pairs a brushless motor with a variable-speed trigger and speeds up to 25,000 RPM.
Choose a different model if you need a right-angle head or want to stay on a battery platform you already own.
Should you choose a straight or right-angle die grinder?
A straight grinder is a useful general shape for open access, while a right-angle model can help reach into tighter spaces. Milwaukee and RYOBI offer right-angle options in this group.
Check the space around the work and the tool's grip before deciding which shape fits.
Do cordless die grinders include a battery?
Several picks here are tool only, and some explicitly exclude the battery and charger. Check the exact package before buying and include a compatible battery in your plan if you do not already have one.
Battery platforms differ, so a battery from another brand will not fit.
Can a cordless die grinder replace an air die grinder?
Cordless models remove the need for an air hose and compressor at the work area, which can make moving around easier. The Milwaukee 2486-20 is designed as a cordless alternative to pneumatic die grinders.
Compare the specific tool's shape, speed control and accessory fit with your jobs before switching.
What accessories fit a die grinder?
Accessory fit depends on the grinder and collet. Several models here are specified for 1/4 in shank accessories, but confirm that your burrs or wheels match the tool and the accessory's intended use.
Follow the tool and accessory instructions, and use appropriate eye and face protection.
