20V or 12V Max Reciprocating Saws? Compared by Specs
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When comparing a 20V vs 12V Max reciprocating saw, you face a choice between raw power and compact convenience. Both tools are cordless and feature variable speed triggers for control. The main difference lies in their voltage and motor design. The DEWALT offers a brushless motor and a longer stroke for aggressive cutting. The Milwaukee provides a complete kit with a battery and charger, prioritizing portability. You must decide which spec profile fits your specific job requirements.
Key differences
| Aspect | DEWALT 20V Brushless Reciprocating Saw | Milwaukee 12V Hackzall Saw Kit |
|---|---|---|
| Voltage | 20V | 12V Max |
| Motor Type | Brushless | Not listed |
| Stroke Length | 1-1/8 in. | 1/2 in. |
| Battery Included | Tool Only | Kit with battery and charger |
| Blade Clamp | Keyless, twist-style | QUIK-LOK Universal 1/2 in. Tang |
Which one should you choose?
Choose DEWALT 20V Brushless Reciprocating Saw if
- You need higher cutting power for tougher materials
- You prefer a brushless motor for efficiency
- You already own compatible 20V batteries
Choose Milwaukee 12V Hackzall Saw Kit if
- You want a complete kit ready to use immediately
- You need a lighter tool for tight spaces
- You prefer a shorter stroke for precision work
Verdict: The DEWALT suits users who need maximum cutting performance and already have a battery ecosystem. The Milwaukee is better for those who want a lightweight, all-in-one solution for lighter tasks. Choose based on whether you prioritize power or immediate readiness.
20V vs 12V Reciprocating Saw Specs
Voltage and Power
The DEWALT DCS382B operates on a 20V MAX power source, while the Milwaukee 2420-21 uses a 12V system. Higher voltage typically translates to greater cutting force and sustained performance under load. The 20V platform allows the DEWALT motor to deliver optimized cutting power for tougher materials. The 12V Milwaukee is designed for lighter duty tasks and tighter spaces. You should choose the 20V model if you frequently cut through dense lumber or thick metals. The 12V option is sufficient for standard residential demolition and pruning.
Motor Type
Motor efficiency is a key differentiator between these two tools. The DEWALT DCS382B features a brushless motor, which the manufacturer notes provides optimized cutting power and efficiency. Brushless motors generally offer longer life, less maintenance, and better battery runtime compared to brushed alternatives. The Milwaukee 2420-21 specifications do not explicitly state the motor type in the provided data, though it is a standard cordless reciprocating saw. If you prioritize extended runtime and reduced mechanical wear, the DEWALT's brushless design offers a clear technical advantage for heavy use.
Stroke Length
Stroke length determines how much material is removed per cut cycle. The DEWALT DCS382B has a stroke length of 1-1/8 inches, allowing for faster removal of waste material during aggressive cutting. The Milwaukee 2420-21 has a stroke length of 1/2 inch. A shorter stroke provides less cutting power but allows for a more compact tool body. The DEWALT is better for rapid demolition work where speed is critical. The Milwaukee’s shorter stroke is suitable for precision cuts in confined areas where a larger tool cannot fit.
Included Tools and Battery
The package contents differ significantly between these two kits. The DEWALT DCS382B is sold as a tool-only unit, meaning you must already own compatible 20V MAX batteries and a charger. The Milwaukee 2420-21 is a complete kit that includes the 12V Hackzall saw, one 12V Lithium-Ion battery, a 30-minute charger, a Hackzall blade, and a carrying case. If you are starting from scratch and do not own Milwaukee 12V batteries, the Milwaukee kit is ready to use immediately. The DEWALT is only a better value if you already have the necessary power source.
Blade Clamp System
Both tools feature keyless blade change mechanisms for convenience. The DEWALT DCS382B uses a twist-style keyless blade clamp. The Milwaukee 2420-21 utilizes the QUIK-LOK Universal 1/2-Inch Tang blade clamp. Both systems allow you to swap blades quickly without additional tools. The QUIK-LOK system is a proprietary Milwaukee design that ensures secure retention for 1/2-inch tang blades. The DEWALT twist-style is also robust and common across their 20V lineup. Both methods are practical for job site efficiency, resulting in a tie for ease of use.
Weight and Portability
Portability is crucial for overhead work or tight spaces. The Milwaukee 2420-21 weighs 2.62 pounds, making it a lightweight option for extended use. The weight of the DEWALT DCS382B is not listed in the provided specifications, though 20V tools are often heavier due to larger battery compatibility. The Milwaukee’s compact size and lower weight reduce user fatigue during prolonged periods of use. If you need to work overhead or in cramped crawl spaces, the lighter Milwaukee tool is easier to maneuver. The DEWALT may be heavier, which could impact comfort during long jobs.
Choose the right reciprocating saw for your job
Heavy-duty demolition and cutting tasks
The DEWALT DCS382B features a 20V MAX brushless motor and a 1-1/8 inch stroke length. This combination provides optimized cutting power and efficiency for rapid material removal. The compact size allows for a high range of motion, making it ideal for tough demolition work where sustained power and faster cuts are necessary.
Light duty work and tight spaces
The Milwaukee 2420-21 is a 12V kit weighing only 2.62 pounds. Its 1/2-inch stroke length and 0-3,000 SPM speed suit lighter tasks. The QUIK-LOK blade clamp enables quick changes. Being a complete kit with a battery and charger, it offers immediate readiness for precise cuts in confined areas without the bulk of a larger tool.
Users wanting a complete ready-to-use kit
The Milwaukee 2420-21 is sold as a kit including a 12V lithium-ion battery and a 30-minute charger. You receive the tool, blade, and carrying case all in one package. This setup ensures you have everything needed to start working immediately, unlike the DEWALT option which is a bare tool requiring separate battery purchase.
Quick picks
| # | Product | Best for | Price |
|---|---|---|---|
| 1 | DEWALT 20V Brushless Reciprocating Saw | Users with existing 20V MAX batteries | Check price of DEWALT 20V Brushless Reciprocating Saw on Amazon |
| 2 | Milwaukee 12V Hackzall Saw Kit | lightweight, precision cutting tasks | Check price of Milwaukee 12V Hackzall Saw Kit on Amazon |
The products compared
DEWALT 20V Brushless Reciprocating Saw
Best for: Users with existing 20V MAX batteries
- Voltage
- 20V (what this guide is about)
- Power Source
- 20V MAX
- Stroke Length
- 1-1/8 in.
- Motor Type
- Brushless
- Battery Included
- Tool Only
- Blade Clamp
- Keyless, twist-style
View on Amazon: DEWALT 20V Brushless Reciprocating Saw Affiliate link
This DEWALT DCS382B is a 20V MAX cordless reciprocating saw with a brushless motor. It features a 1-1/8 inch stroke length and a keyless twist-style blade clamp. The tool only design means you supply your own battery. You get a compact body and a 2-finger variable trigger for control. It suits users who already own 20V MAX batteries and need rapid cuts through various materials.
Pros
- Brushless motor for optimized cutting power
- 1-1/8 inch stroke length for fast cuts
- Keyless twist-style blade clamp for quick changes
- 2-finger variable trigger for speed control
Cons
- Sold as a tool only with no battery included
- No variable speed dial on the tool body
- Limited to 20V MAX platform compatibility
Good fit if
- You already own DEWALT 20V MAX batteries
- You need a compact saw for tight spaces
- You prefer quick blade changes without tools
Skip if
- You need a complete kit with battery and charger
- You prefer 12V Max portability
- You require a fixed speed setting
Verdict: DEWALT 20V Brushless Reciprocating Saw fits professionals who already have 20V MAX batteries and need a compact, high-power tool for rapid material removal.
Milwaukee 12V Hackzall Saw Kit
Best for: lightweight, precision cutting tasks
- 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
The Milwaukee 2420-21 is a 12V Max reciprocating saw kit designed for precision work. It delivers up to 3,000 strokes per minute with a 1/2-inch stroke length. The tool weighs 2.62 lbs and includes a battery and charger. This compact size suits detailed cutting tasks where maneuverability matters more than raw power. You get a complete kit ready for immediate use.
Pros
- 12V Max lithium-ion power source
- Variable speed trigger up to 3,000 SPM
- QUIK-LOK universal 1/2-inch tang blade clamp
- Lightweight 2.62 lbs tool weight
- Includes battery, charger, and carrying case
Cons
- 12V voltage limits cutting power compared to 20V models
- 1/2-inch stroke length is shorter than heavy-duty options
- 2.62 lb weight may feel less substantial for tough materials
Good fit if
- You need a compact tool for tight spaces
- You prefer lighter weight for extended overhead use
- You want a complete kit with battery and charger included
Skip if
- You require high power for thick or hardened materials
- You need a longer stroke length for aggressive cutting
- You already own compatible 12V batteries and want a tool-only option
Verdict: Milwaukee 12V Hackzall Cordless Saw fits users who prioritize maneuverability and lightweight handling over maximum cutting power. It is ideal for detailed work where a 20V saw would be too bulky.
Specifications side by side
| Spec | DEWALT 20V Brushless Reciprocating Saw | Milwaukee 12V Hackzall Saw Kit |
|---|---|---|
| Power Source | 20V MAX | 12V |
| Stroke Length | 1-1/8 in. | 1/2 in. |
| Strokes Per Minute | not stated | 0-3,000 SPM |
| Motor Type | Brushless | not stated |
| Battery Included | Tool Only | Kit with battery and charger |
| Battery Capacity | not stated | 12V LITHIUM-ION |
| Tool Weight | not stated | 2.62 lbs. |
| Blade Clamp | Keyless, twist-style | QUIK-LOK Universal 1/2 in. Tang |
| Variable Speed Trigger | 2-finger variable trigger | Variable speed |
| Voltage | 20V | 12V Max |
| Included Tools | Reciprocating Saw | not stated |
| Dimensions | not stated | 7.2 × 4.76 × 15.4 inches |
| Weight | not stated | 2.62 pounds |
| Color | Black | Red/Black |
| Size | not stated | 15.60 L x 7.70 W x 3.95 H |
| Model | not stated | 2420-21 |
Frequently asked questions
Is a 20V reciprocating saw too heavy for one-handed use?
Weight depends on the specific model. The Milwaukee 12V Hackzall weighs 2.62 pounds, making it easy to maneuver for detailed work. The DEWALT 20V is a bare tool, so you add the battery weight. Heavier tools provide more power but may cause fatigue during extended overhead use.
Does a 12V Max saw have enough power for cutting nails?
Yes, it can handle nails, but with limitations. The Milwaukee 12V is designed for lightweight, precision tasks. It excels in tight spaces where a larger saw cannot fit. However, it may struggle with thick metal or dense wood containing multiple embedded nails compared to a 20V unit.
Can I use a 20V battery in a 12V saw?
No, you cannot mix voltages. The DEWALT requires a 20V MAX battery, while the Milwaukee uses a 12V system. These platforms are not cross-compatible. You must purchase the correct battery for each tool. Using the wrong voltage can damage the motor and void the tool's operation.
Which saw is better for cutting PVC pipe in tight spaces?
The Milwaukee 12V Hackzall is superior for this task. Its compact size, measuring 7.2 inches in length, allows access to confined areas. The DEWALT 20V is a bare tool with no specified compact dimensions listed. Maneuverability is key for PVC work, favoring the lighter 12V option.
Does a brushless motor make a big difference in reciprocating saws?
Yes, brushless motors offer greater efficiency and longevity. The DEWALT 20V features a brushless design, which reduces friction and heat. This results in longer runtime and more power per battery charge. Standard brushed motors wear out faster due to physical contact between brushes and the commutator.
Is it worth buying a kit or just the bare tool?
It depends on your existing battery inventory. The DEWALT is sold as a bare tool, ideal if you already own 20V batteries. The Milwaukee 12V Hackzall is listed as a kit, which includes necessary accessories. If you lack compatible batteries, a kit is the more practical starting point.