What Is a Reciprocating Saw? Definition and How It Works
A reciprocating saw is a handheld power tool that uses a push-and-pull (reciprocating) motion of a blade to cut through various materials. Often called a “Sawzall” (a common brand name), it is a staple in demolition, construction, and remodeling projects due to its versatility and ability to make rough cuts quickly.
The tool works by moving the blade back and forth rapidly in a straight line. The main components include:
- Motor: Powers the blade’s movement.
- Blade: A straight, toothed blade that does the cutting.
- Shoe: A metal plate at the front that rests against the workpiece to stabilize the cut and reduce vibration.
- Trigger: Controls the speed of the blade.
When you press the trigger, the motor drives a mechanism that converts its rotational motion into the linear, back-and-forth stroke of the blade. This action allows the teeth of the blade to tear through material on both the forward and backward strokes.
What Can a Reciprocating Saw Be Used For? Common Applications
The primary strength of a reciprocating saw is its ability to cut a wide range of materials in situations where precision is less critical than speed and accessibility. It excels in:
- Demolition: Tearing down walls, cutting through studs, removing old plumbing, and dismantling structures. It can easily cut through wood containing embedded nails or screws.
- Construction & Remodeling: Cutting openings for windows, doors, or vents; trimming pipes and conduit; and making rough cuts in framing lumber.
- Plumbing: Cutting through PVC, copper, and other pipes in tight spaces.
- Outdoor & Pruning: With the appropriate blade, it can cut tree branches, roots, and other outdoor materials.
Common materials it can cut include wood, metal (including nails and screws), PVC, drywall, plaster, and fiberglass. The choice of blade is critical for effectiveness and safety.
Key Features to Consider When Choosing a Reciprocating Saw
When selecting a reciprocating saw, several features determine its performance and suitability for different tasks.
Corded vs. Cordless Power
Corded models provide consistent, unlimited power as long as they are plugged in, making them ideal for heavy-duty, prolonged use. Cordless (battery-powered) models offer greater mobility and convenience, especially in areas without easy access to outlets. Modern cordless models with high-voltage batteries (e.g., 18V or 20V) now offer power comparable to corded models for most common tasks.
Stroke Length and Speed (SPM)
Stroke length is the distance the blade travels in one full back-and-forth cycle. A longer stroke length (typically 1 to 1 1/4 inches) removes more material per stroke, making it better for fast, rough cuts in thick materials. Strokes per minute (SPM) indicates how fast the blade moves. Most saws operate in a range of 0 to 3,000 SPM, with variable-speed triggers allowing you to match the speed to the material.
Orbital Action
Some saws offer orbital action, which adds a slight circular motion to the blade’s push-and-pull stroke. This feature increases cutting speed in wood but results in a rougher finish. It is generally turned off for cutting metal or when a cleaner cut is needed.
How to Use a Reciprocating Saw: Step-by-Step Guidance and Safety Tips
Using a reciprocating saw safely and effectively involves proper blade selection and technique.
Choosing the Right Blade
- Wood-cutting blades: Have large, aggressive teeth for fast cuts in lumber.
- Metal-cutting blades: Have finer teeth and are made of harder materials like bi-metal or carbide.
- Pruning blades: Have large, curved teeth for cutting branches.
- Demolition blades: Are thick and durable, designed to cut through multiple materials.
Basic Cutting Steps
- Secure the workpiece firmly.
- Insert the correct blade and ensure it is locked.
- Place the shoe flat against the workpiece surface.
- Start the saw at a low speed to establish the cut.
- Let the blade do the work; do not force it.
Safety Precautions
Always wear safety glasses and hearing protection. Be aware of kickback, which can occur if the blade binds. To prevent this, support the workpiece to avoid pinching the blade, and maintain a firm grip. Never cut materials that could contain hidden electrical wiring or plumbing.
Reciprocating Saw vs. Other Saws: Which Tool Do You Need?
Understanding how a reciprocating saw compares to other common saws helps you choose the right tool.
- vs. Circular Saw: A circular saw makes straight, precise cuts in sheet goods and lumber. A reciprocating saw is better for rough cuts, demolition, and cutting in tight or awkward spaces.
- vs. Jigsaw: A jigsaw is designed for detailed, curved cuts in thinner materials. A reciprocating saw is more powerful and aggressive, suited for demolition and rough cutting.
- vs. Chainsaw: A chainsaw is the primary tool for felling trees and cutting large logs. A reciprocating saw with a pruning blade is better for smaller branches and trimming in confined areas.
Frequently Asked Questions
What is another name for a reciprocating saw?
A reciprocating saw is commonly referred to by the brand name “Sawzall,” which was popularized by Milwaukee Tool. It is also sometimes called a demolition saw or a cut-out saw.
Can a reciprocating saw cut through metal?
Yes, with the appropriate blade. Use a metal-cutting blade with fine teeth, and apply cutting oil if cutting thick metal to keep the blade cool and extend its life.
What is the difference between a reciprocating saw and a jigsaw?
While both use a reciprocating blade, a jigsaw is designed for precision and detailed curved cuts in thinner materials like plywood and laminate. A reciprocating saw is a more powerful, aggressive tool built for demolition and rough cutting through thicker, denser materials.
How do I prevent the blade from binding?
Binding occurs when the workpiece pinches the blade. To prevent this, ensure the material is properly supported so the cut can open up as you go. Avoid cutting too deep in one pass, and use a blade appropriate for the material’s thickness.
