Makita 18V 4-1/2 / 5 vs Makita 18V LXT Brushless 4-1/2: Spec Comparison
Compare Makita 18V grinders by published specs. The XAG09Z accepts 4-1/2 and 5-inch discs and weighs 5.7 pounds. The XAG20Z uses 5-inch discs and weighs 7.1 pounds.
By GaugeKit Editorial Team 6 min read
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You are comparing the makita 18v 4 1 2 5 vs 18v lxt brushless 4 1 2. Both are 18V LXT bare tools with brushless motors and electric brakes. They share automatic speed change technology and active feedback sensing. The main difference lies in their physical dimensions and weight. One model is heavier and wider. The other is lighter and more compact. You need to check the specs to see which fits your workflow.
Weight
7.1 pounds
5.7 pounds
Width
13.9 inches
13.3 inches
Length
7.9 inches
8.39 inches
Switch Type
Paddle
not listed
Size (Arbor)
0.625 in
5/8 in.
Choose the first if
- You prefer a paddle switch for direct trigger control.
- You need the larger 5-inch wheel capacity alongside the 4-1/2-inch option.
- You do not mind the extra weight for stability.
Choose the second if
- You want a lighter tool at 5.7 pounds.
- You need a more compact width of 13.3 inches.
- You value the efficient brushless motor for longer run time.
Verdict
Choose the XAG20Z if you prefer a paddle switch and do not mind the extra weight. Choose the XAG09Z if you want a lighter, more compact tool for extended use. Both offer identical core motor technologies and safety features.
Weight and Size Comparison
Weight
Edge: Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder
The Makita XAG09Z weighs 5.7 pounds, while the Makita XAG20Z weighs 7.1 pounds. This 1.4-pound difference is significant for overhead work or prolonged use. You will feel less fatigue with the lighter XAG09Z model. The XAG20Z is heavier, which may provide more stability for some tasks but adds strain over time. For users prioritizing maneuverability and reduced arm strain, the lower weight of the XAG09Z is a clear advantage. The XAG20Z requires more physical effort to hold steady during extended cutting or grinding sessions.
Overall Dimensions
Edge: Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder
The XAG09Z measures 13.3 inches in width and 8.39 inches in length. The XAG20Z measures 13.9 inches in width and 7.9 inches in length. The XAG09Z is shorter in length, which may improve balance for some users. However, the XAG20Z is slightly wider. Both tools share a similar height of approximately 5.4 inches. The compact length of the XAG09Z might help in tighter spaces. The XAG20Z’s design prioritizes a different balance point. You should consider your typical workspace constraints when choosing between the slightly longer XAG09Z or the wider XAG20Z.
Switch Type
Edge: Makita 18V 4-1/2 / 5 in. Paddle Angle Grinder
The Makita XAG20Z features a paddle switch. The Makita XAG09Z data does not explicitly list its switch type, though it is a standard LXT grinder. Paddle switches are often preferred for safety because they require constant pressure to operate. If the XAG09Z uses a similar paddle or a lock-on trigger, the difference may be minimal. However, the XAG20Z explicitly highlights its paddle design. This allows for quick release of the tool if it kicks back. You should verify the switch mechanism on the XAG09Z in person, as the data is incomplete on this specific control interface compared to the explicit paddle description of the XAG20Z.
Arbor Size
Edge: Tie
The XAG20Z has an arbor size of 0.625 inches. The XAG09Z has an arbor size of 5/8 inch. These values are identical, as 0.625 inches equals 5/8 inch. This means both tools accept the same standard mounting hardware for discs and wheels. You can use the same accessories on either grinder without adapters. This compatibility simplifies your tool kit since you do not need to buy different mounting nuts or washers for each machine. The shared arbor size ensures that your existing discs fit both models perfectly.
Motor Efficiency
Edge: Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder
Both tools feature BL Brushless motors. The XAG09Z explicitly states this motor optimizes battery energy use for up to 50% longer run time per charge. The XAG20Z mentions the brushless motor runs cooler and more efficiently for longer life but does not quantify the runtime improvement. The XAG09Z provides a specific performance benefit regarding battery longevity. This suggests the XAG09Z may offer better power management for extended projects. You gain a measurable advantage in run time with the XAG09Z due to its optimized energy control features compared to the general efficiency claims of the XAG20Z.
Which Makita 18V Grinder Suits You
Users needing lightweight tools for overhead work
Our pick: Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder
The XAG09Z weighs 5.7 pounds, significantly lighter than the 7.1-pound XAG20Z. This weight reduction reduces fatigue during extended overhead grinding or cutting tasks. Both models feature brushless motors and electric brakes, but the lighter chassis of the XAG09Z makes it the superior choice for users prioritizing comfort and reduced physical strain over the duration of a workday.
Professionals requiring variable speed control
Our pick: Makita 18V 4-1/2 / 5 in. Paddle Angle Grinder
The XAG20Z includes a variable speed control dial allowing manual RPM adjustment from 3,000 to 8,500. This feature lets you match the speed precisely to the application. The XAG09Z data does not list a manual variable speed dial. If you need to manually fine-tune grinding speeds for different materials, the XAG20Z provides this specific operational control.
Users seeking extended battery run time
Our pick: Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder
The XAG09Z is described as optimizing battery energy use for up to 50% longer run time per charge. This efficiency comes from its electronically controlled brushless motor design. The XAG20Z data does not mention this specific runtime benefit. If maximizing the number of cuts or grinds per battery charge is your priority, the XAG09Z offers this documented efficiency advantage.
Makita 18V 4-1/2 / 5 in. Paddle Angle Grinder
Best for: Makita users needing paddle control and auto-speed
- Wheel Diameter
- 4-1/2”/ 5"
- Voltage
- 18V
- Motor Type
- Brushless
- Switch Type
- Paddle
- Braking System
- Electric brake
- Included Tools
- Grinder
This Makita 18V LXT bare tool uses a brushless motor for efficient cooling and longer life. It accepts 4-1/2-inch or 5-inch wheels. The paddle switch offers direct control. Variable speed ranges from 3,000 to 8,500 RPM. An electric brake stops the wheel in two seconds. It weighs 7.1 pounds. This model suits users who prefer paddle triggers and need automatic speed adjustment for various cutting tasks.
- Brushless motor runs cooler and more efficiently
- Electric brake stops the wheel in 2 seconds or less
- Active feedback-sensing technology cuts power if the wheel jams
- Variable speed control dial adjusts RPM from 3,000 to 8,500
- Weighs 7.1 pounds, which is heavier than some compact alternatives
- Paddle switch requires two hands to operate safely
- Sold as a bare tool without a battery or charger
- You already own Makita 18V LXT batteries
- You prefer the direct control of a paddle switch
- You need automatic speed adjustment for consistent performance
- You want a lighter tool under 6 pounds
- You need a complete kit with battery and charger included
- You prefer a side switch for one-handed operation
Verdict: Makita 18V 5-Inch Paddle Grinder delivers robust performance with its brushless motor and safety features. It is best for Makita battery owners who value paddle switch control and automatic torque adjustment.
Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder
Best for: users with existing 18V LXT batteries
- Wheel Diameter
- 4-1/2"/5"
- Voltage
- 18V
- Motor Type
- BL Brushless
- Braking System
- Electric brake
- Chuck Size
- 1/2 Inch
- Included Tools
- Grinder
This Makita XAG09Z is a cordless 18V brushless angle grinder designed for cutting and grinding. It accepts 4-1/2 inch and 5 inch wheels. The tool weighs 5.7 pounds and measures 13.3 inches long. It features an electric brake and automatic speed change technology. This model suits users needing efficient brushless motor performance in a standard bare tool configuration.
- BL Brushless motor runs cooler and more efficiently
- Electric brake stops the wheel in 2 seconds or less
- Automatic speed change adjusts torque for optimum performance
- Active feedback-sensing technology stops the motor if rotation is forced
- 5.7 pound weight is heavier than typical lighter duty grinders
- 13.3 inch length offers less compactness than smaller 4-inch models
- You need a bare tool for your existing 18V LXT battery system
- You require automatic speed change for consistent torque under load
- You want an electric brake for faster wheel stopping
- You prefer a kit with batteries and a charger included
- You need a grinder with a smaller 4-inch wheel capacity
- You prioritize a lighter tool under 5 pounds
Verdict: Makita 18V LXT Brushless 4-1/2" Angle Grinder fits professionals who already own 18V batteries and need the efficiency of a brushless motor with automatic speed adjustment. It is ideal for users who value the safety of an electric brake and active feedback sensing in a bare tool format.
Specifications side by side
| Spec | Makita 18V 4-1/2 / 5 in. Paddle Angle Grinder | Makita 18V LXT Brushless 4-1/2 / 5-Inch Grinder |
|---|---|---|
| Wheel Diameter | 4-1/2”/ 5" | 4-1/2"/5" |
| Voltage | 18V | 18V |
| Motor Type | Brushless | BL Brushless |
| Switch Type | Paddle | – |
| Braking System | Electric brake | Electric brake |
| Chuck Size | – | 1/2 Inch |
| Included Tools | Grinder | Grinder |
| Power Source | – | Cordless |
| Configuration | Bare Tool | Bare Tool |
| Set Type | Tool Only | Tool Only |
| Dimensions | 7.9 × 13.9 × 5.4 inches | 8.39 × 13.3 × 5.43 inches |
| Weight | 7.1 pounds | 5.7 pounds |
| Size | 0.625 in | 5/8 in. |
| Color | Teal | Teal |
| Model | XAG20Z | XAG09Z |
Frequently asked questions
Does the Makita XAG09Z support both 4-1/2 and 5-inch discs?
Yes, the XAG09Z accepts both 4-1/2 and 5-inch wheels. This versatility allows you to switch between finer cutting tasks and heavier grinding without changing tools. The XAG20Z is designed specifically for 5-inch wheels, offering less flexibility in disc size options.
Which grinder is lighter for overhead work?
The XAG09Z is lighter at 5.7 pounds. The XAG20Z weighs 7.1 pounds. The 1.4-pound difference reduces fatigue during prolonged overhead use. You will feel less strain in your arm and shoulder when using the lighter XAG09Z model for extended periods.
Do both models use paddle switches?
Only the XAG20Z features a paddle switch. The XAG09Z uses a different switch mechanism, likely a trigger or side switch, though the data confirms the XAG20Z's paddle design. Paddle switches allow for quick release by relaxing your hand, which can enhance safety.
Are both tools sold as bare units?
Yes, both the XAG09Z and XAG20Z are sold as bare tools. They do not include batteries or chargers. You must already own compatible 18V LXT batteries to operate these grinders. This setup is ideal for existing Makita users who want to expand their tool collection.
What is the spindle size for these grinders?
The XAG09Z has a 5/8-inch spindle size. The XAG20Z has a 0.625-inch spindle size. These measurements determine the arbor size for your discs. You must match your grinding or cutting discs to the correct spindle size to ensure safe and proper installation.
Do both grinders have automatic speed adjustment?
Yes, both models feature automatic speed change technology. This system adjusts the motor speed based on the load applied. It helps maintain consistent performance and protects the motor during heavy grinding. This feature is standard on both the XAG09Z and XAG20Z brushless models.
Which model is more compact in width?
The XAG09Z is narrower at 13.3 inches wide. The XAG20Z is 13.9 inches wide. The reduced width of the XAG09Z may offer better maneuverability in tight spaces. You might find it easier to access confined areas with the slimmer profile of the lighter model.
See also
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