18V vs 12V Max Reciprocating Saws in 2026: Key Differences

Key differences

Which one should you choose?

18V vs 12V Max Reciprocating Saws

Voltage and Power

Edge: Makita 18V Brushless One-Handed Reciprocating Saw

Voltage is the primary differentiator between these two reciprocating saws. The Makita XRJ08Z operates on an 18V LXT power system, providing higher potential energy to the motor. In contrast, the Milwaukee 2420-21 uses a 12V Max system. Higher voltage generally translates to more sustained power under load, which can be beneficial for cutting through denser materials or thicker metal. The 18V platform is designed for users who need robust performance for demanding tasks. The 12V platform prioritizes lighter duty work where high torque is less critical. You should choose based on the density of materials you cut most often.

Motor Type

Edge: Makita 18V Brushless One-Handed Reciprocating Saw

The internal motor technology differs significantly between the two tools. The Makita XRJ08Z features a Makita-built brushless motor. Brushless motors are generally more efficient, produce less heat, and have longer lifespans because they lack physical brushes that wear out. The Milwaukee 2420-21 does not explicitly list its motor type in the provided data, so you cannot confirm if it is brushed or brushless. Assuming the Milwaukee uses a traditional brushed motor, the Makita likely offers better efficiency and lower maintenance over time. This is a key spec for long-term reliability.

Stroke Length

Edge: Makita 18V Brushless One-Handed Reciprocating Saw

Stroke length determines how much material is removed with each pass of the blade. The Makita XRJ08Z has a stroke length of 7/8 inch, which allows for faster material removal and more aggressive cutting. The Milwaukee 2420-21 has a stroke length of 1/2 inch. A shorter stroke provides more control and less vibration, making it easier to maneuver in tight spaces. The Makita’s longer stroke is better for speed, while the Milwaukee’s shorter stroke may feel more manageable for precision work. Your preference depends on whether you prioritize speed or control.

Strokes Per Minute

Edge: Tie

Both tools offer variable speed triggers, but their maximum stroke rates are similar. The Makita XRJ08Z reaches up to 3,100 strokes per minute (SPM). The Milwaukee 2420-21 reaches up to 3,000 SPM. The difference of 100 SPM is negligible in practical use. Both machines allow you to adjust the speed based on the material. You can slow down for metal and speed up for wood. Since both offer variable control and nearly identical top speeds, neither has a clear advantage in this specific metric. The choice here comes down to other factors like ergonomics or battery ecosystem.

Included Accessories

Edge: Milwaukee 12V Hackzall Saw Kit

What you get out of the box varies greatly. The Makita XRJ08Z is sold as a tool only, meaning it does not include a battery or charger. You must already own compatible 18V LXT batteries. The Milwaukee 2420-21 is a kit that includes the saw, a 12V Lithium-Ion battery, a 30-minute charger, a Hackzall blade, and a carrying case. If you do not own Milwaukee 12V tools, the Milwaukee kit is ready to use immediately. The Makita is only suitable if you are already invested in the 18V LXT battery platform.

Which 12V or 18V saw suits you

You need a complete ready-to-use tool

Our pick: Milwaukee 12V Hackzall Saw Kit

The Milwaukee 2420-21 arrives as a full kit. It includes a 12V lithium-ion battery, a 30-minute charger, a carrying case, and a Hackzall blade. You do not need to purchase separate components. This all-in-one package is ideal if you want a single purchase that provides everything required for immediate operation and storage.

You prioritize cutting speed and power

Our pick: Makita 18V Brushless One-Handed Reciprocating Saw

The Makita XRJ08Z delivers up to 3,100 strokes per minute with a 7/8-inch stroke length. This combination allows for up to 55% faster cutting compared to standard models. The 18V LXT system provides higher potential energy. If you require maximum efficiency and aggressive material removal, this brushless motor offers superior performance metrics.

You value compactness and reduced vibration

Our pick: Makita 18V Brushless One-Handed Reciprocating Saw

Weighing only 1 pound, the Makita XRJ08Z is significantly lighter than the Milwaukee option. It features a low vibration design that reduces shake by up to 40%. The one-handed grip and loop-shaped handle guard improve rigidity. This makes it easier to handle for extended periods or in tight spaces where control is critical.

Quick picks

The products compared

1

Makita 18V Brushless One-Handed Reciprocating Saw

Best for: one-handed cutting with existing 18V batteries

Voltage

18V (what this guide is about)

Power Source

18V LXT

Stroke Length

7/8 in.

Strokes Per Minute

0-3,100 SPM

Motor Type

Brushless

Battery Included

Tool Only

View on Amazon: Makita 18V Brushless One-Handed Reciprocating Saw Affiliate link

The Makita XRJ08Z is an 18V LXT brushless reciprocating saw designed for one-handed operation. It delivers 0 to 3,100 strokes per minute with a 7/8-inch stroke length. The tool weighs 1 pound and measures 14.4 inches long. It features a low-vibration design and a loop-shaped handle guard. This compact saw suits users who need a lightweight, high-speed tool for tight spaces or overhead work.

Pros

• Brushless motor provides up to 55% faster cutting
• One-handed grip transmits force firmly to the workpiece
• Low vibration design reduces fatigue by up to 40%
• Lightweight 1-pound build for easy handling

Cons

• Sold as a tool only with no battery included
• Single speed setting limits control on delicate cuts
• No variable speed trigger mentioned in specifications

Good fit if

• You need a lightweight tool for overhead or one-handed use
• You already own 18V LXT batteries
• You prioritize cutting speed and reduced vibration

Skip if

• You require a complete kit with battery and charger
• You need variable speed control for precision work
• You prefer a two-handed grip for maximum stability

Verdict: Makita 18V Compact Reciprocating Saw offers high speed and low vibration in a lightweight package. It is ideal for users who already have 18V batteries and need a tool for one-handed or overhead cutting tasks.

2

Milwaukee 12V Hackzall Saw Kit

Best for: One-handed cutting in tight spaces

Voltage

12V Max (what this guide is about)

Power Source

12V

Stroke Length

1/2 in.

Strokes Per Minute

0-3,000 SPM

Battery Included

Kit with battery and charger

Battery Capacity

12V LITHIUM-ION

View on Amazon: Milwaukee 12V Hackzall Saw Kit Affiliate link

This 12V Hackzall is a compact reciprocating saw built for one-handed use. It delivers up to 3,000 strokes per minute with a half-inch stroke length. The kit includes a 12V lithium-ion battery, a 30-minute charger, and a carrying case. Weighing just 2.62 pounds, it offers portability and ease of use for tight spaces.

Pros

• Variable speed trigger for control
• QUIK-LOK universal blade clamp
• Lightweight 2.62 lb design
• Includes battery and charger

Cons

• Lower 12V power compared to 18V models
• Smaller 0.5-inch stroke length
• Limited to single battery capacity

Good fit if

• You need a one-handed tool
• You work in tight spaces
• You prefer lighter weight tools

Skip if

• You require maximum cutting power
• You need heavy-duty demolition
• You want longer stroke length

Verdict: Milwaukee 12V Hackzall Compact Saw fits users who prioritize portability and control over raw power. It is ideal for precise cuts in confined areas where a larger 18V saw cannot reach.

Specifications side by side

Frequently asked questions

See also

• best 18V reciprocating saws
• 20V MAX vs 18V table saw