A jigsaw is a versatile power tool used for cutting curved and straight lines in wood, metal, plastic, and drywall. Its thin, reciprocating blade moves up and down rapidly, allowing you to make intricate cuts with ease. Whether you’re a DIY enthusiast or a pro, this guide explains everything you need to know about jigsaws, from choosing the right blade to safety practices.
Key Takeaways
- A jigsaw cuts a wide variety of materials: wood, metal, plastic, laminate, and tile with the right blade.
- It excels at making curved cuts: unlike circular saws, a jigsaw can cut circles, patterns, and irregular shapes.
- Blade choice is critical: TPI (teeth per inch) and shank type (T-shank or U-shank) determine performance and material compatibility.
- Features like orbital action and variable speed enhance control: orbital action helps cut faster in wood, and variable speed lets you adjust for different materials.
- Safety is non-negotiable: always wear eye protection, clamp your workpiece, and never force the blade.
- Jigsaws are ideal for DIY projects: from cutting countertops to crafting furniture, it’s a must-have in any workshop.
- Battery-powered models offer portability: cordless jigsaws are great for job sites or outdoor work without a power outlet.
📑 Table of Contents
What Is a Jigsaw? A Complete Guide
Have you ever needed to cut a wavy line in a piece of plywood or trim a kitchen countertop to fit around a sink? That’s exactly when a jigsaw becomes your best friend. This handheld power tool uses a small, thin blade that moves up and down at high speed, allowing you to slice through materials with surprising precision — especially on curves.
In this guide, we’ll answer the question “what is a jigsaw” in plain English. You’ll learn how it works, what kinds of cuts it can make, how to choose the right blade, and some pro tips to get the most out of this versatile tool. By the end, you’ll know if a jigsaw belongs in your tool collection — spoiler: it probably does.
How Does a Jigsaw Work?
A jigsaw is pretty simple. You press the trigger, and an electric motor makes the blade go up and down like a sewing machine needle — only way faster. The blade moves hundreds or even thousands of times per minute. As you guide the saw along your marked cut line, the teeth on the blade remove tiny chips of material.
Reciprocating Action
The blade moves reciprocally — up and down. On the upstroke, the blade cuts; on the downstroke, it clears debris. Many jigsaws also have orbital action, which tilts the blade slightly forward during the upstroke. This makes the cut faster and more aggressive, especially in thick wood. You can usually adjust the orbital setting from 0 (straight up and down) to 3 (maximum forward tilt). Use less orbit for metals and plastics, and more for softwoods and plywood.
Base Plate (Shoe)
The flat metal plate at the bottom of the jigsaw is called the shoe. It rests on your workpiece and helps you stay stable. Many shoes can be tilted (usually from 0° to 45°) for making bevel cuts. Make sure the shoe is clean and free of debris to prevent scratches on your material.
Blade Clamp
Most modern jigsaws use a T-shank blade that clicks into a spring-loaded clamp. Older models may use U-shank blades with a screw. T-shank is now the standard — easier to swap and more secure. Always check compatibility before buying blades.
What Can You Cut With a Jigsaw?
One reason jigsaws are so popular is their versatility. With the right blade, you can cut through materials that other saws struggle with.
Wood and Plywood
Jigsaws are amazing for cutting softwoods like pine, hardwoods like oak, and plywood up to about 1.5 inches thick. For thicker wood, a scroll saw might be better, but for most DIY projects, a jigsaw does the job. Use blades with higher TPI (teeth per inch) for cleaner cuts on thin plywood.
Metal
Sheet metal, aluminum, and even thin steel (like electrical boxes) are no problem. You just need a blade designed for metal — often labeled “bi-metal” or “high-speed steel.” Reduce speed and use cutting oil or wax to keep the blade cool.
Plastic and Laminate
Cutting acrylic, PVC, or laminate countertops? A jigsaw with a fine-tooth blade (10-20 TPI) works great. To avoid melting the plastic, turn off the orbital action and use a slower speed.
Ceramic Tile and Drywall
With special carbide-grit blades, you can even cut ceramic tile (handy for sink cutouts) or plasterboard. These blades don’t have teeth — they grind away the material.
Types of Jigsaws: Corded vs. Cordless
When shopping for a jigsaw, the first big decision is whether to go corded (plug-in) or cordless (battery-powered).
Corded Jigsaws
- Pros: Unlimited runtime, consistent power, generally lower cost, lighter weight (no battery).
- Cons: Limited by cord length; can get tangled. Not ideal for working outside or far from an outlet.
Cordless Jigsaws
- Pros: Huge freedom of movement, perfect for job sites, can cut in awkward spots. Modern batteries (e.g., 18V or 20V) provide ample power.
- Cons: Runtime limited to battery charge; may need a spare battery. Often heavier due to battery pack.
If you’re a weekend warrior working mostly in a garage, a corded jigsaw is fine. If you’re a contractor or like working on ladders, go cordless — just invest in a good battery system.
How to Choose the Right Jigsaw Blade
This is where many beginners get confused. But don’t worry — it’s actually simple once you know the basics.
Blade Shank: T-Shank vs. U-Shank
As mentioned, T-shank is the modern standard. It looks like a letter T at the top. U-shank is older and less common. Buy blades that match your jigsaw’s clamping system.
Teeth Per Inch (TPI)
- Low TPI (6-10): Fast, rough cuts in thick wood. Suitable for framing or rough work.
- Medium TPI (10-16): General-purpose, good for plywood and plastic.
- High TPI (16-24): Fine, smooth cuts for thin wood, metal, and laminates.
A good rule of thumb: for 3/4-inch plywood, use 10-12 TPI. For 1/8-inch steel, use 20-24 TPI.
Blade Material
- HSS (High-Speed Steel): Good for wood and soft metals.
- Bi-Metal: More durable, cuts wood with nails, ideal for metal.
- Carbide Grit: For tile, fiberglass, and masonry — essentially a grinding edge.
Safety Tips for Using a Jigsaw
Jigsaws are safer than many power saws because the blade is small and the tool is handheld. But you still need to be careful. Here’s what to keep in mind.
Always Wear Safety Glasses
Flying chips and broken blades can hit your eyes. Get a good pair of impact-resistant glasses.
Secure Your Workpiece
Use clamps or a vise. Never hold the material with your hand while cutting — if the saw jumps, you could get injured. Clamp it firmly to a workbench.
Use the Right Blade for the Material
Using a dull or wrong blade forces you to push harder, increasing kickback risk. A sharp blade cuts smoothly with light pressure.
Let the Saw Do the Work
Don’t push or force the jigsaw forward. Guide it gently. If you feel resistance, slow down or check the blade. Pushing can cause the blade to bend or break.
Cut on a Stable Surface
Support both sides of the cut line so the piece doesn’t fall and pinch the blade. Use a scrap board underneath to prevent tear-out on the bottom.
Unplug or Remove Battery When Changing Blades
Never, ever leave a jigsaw plugged in while you change the blade. A accidental trigger pull can cause serious injury. Remove the battery or disconnect the cord.
Creative Projects You Can Do With a Jigsaw
Now that you know what a jigsaw is and how to use it safely, let’s talk about fun stuff — what can you actually build?
Cutting Kitchen Countertop Cutouts
Need to install a sink? Mark the outline, drill a starter hole, insert the blade, and cut along the line. A fine-tooth blade for laminate gives a clean edge.
Making Wooden Signs
Trace a design or lettering on plywood and cut it out. Use a scroll blade (very thin, high TPI) for tight curves. Sand the edges smooth, paint, and hang.
Cutting Circles and Holes for Electrical Boxes
If you’re wiring a new room, you can cut circular holes in drywall or plywood for outlets and switches. Use a circle-cutting guide or freehand with a steady hand.
Creating Jigsaw Puzzles (for Kids or Decor)
Draw a picture on plywood, then cut it into puzzle pieces. This is a great way to practice control with curves. Use a fine blade and take your time.
Remember: practice on scrap first. A jigsaw is easy to learn, but like any tool, it takes a little patience to master.
Conclusion
So, what is a jigsaw? It’s a portable, affordable power saw that can handle curved cuts, straight cuts, and a massive variety of materials. Whether you’re trimming baseboards, cutting a hole for a sink, or building a birdhouse, the jigsaw is one of the most useful tools in any workshop.
Key points to remember: pick a good jigsaw (corded or cordless), match the blade to the material, and always prioritize safety. With those three things, you’ll be cutting like a pro in no time. Now go grab some scrap wood and try out your new skills!
Frequently Asked Questions
Can a jigsaw cut straight lines?
Yes, a jigsaw can cut straight lines, but it requires a steady hand. Using a guide fence or a straight edge clamped to the workpiece helps keep the saw on track. For long, perfectly straight cuts, a circular saw is better, but a jigsaw can do the job for shorter distances.
What’s the difference between a jigsaw and a reciprocating saw?
A reciprocating saw (often called a Sawzall) uses a larger blade that moves in a long stroke, designed for demolition and rough cutting. A jigsaw has a shorter, finer blade that moves faster, making it better for precise curved cuts and delicate materials. They are not interchangeable.
How thick can a jigsaw cut?
Most jigsaws can cut wood up to about 1.5 to 2 inches thick. For thicker materials, use a longer blade and reduce feed speed. In metal, typical maximum is 1/4 inch for steel. Depth of cut depends on blade length and material hardness.
Do I need a variable speed jigsaw?
Highly recommended. Variable speed lets you slow down for metal or plastic (which can melt) and speed up for softwood. Many beginner models are single-speed, but paying a little extra for variable speed gives you much more control and better results.
What does orbital action mean on a jigsaw?
Orbital action tilts the blade forward on the upstroke, making it cut faster and more aggressively. It helps clear sawdust and is great for thick wood. You can usually adjust the amount of orbit. For fine cuts or metal, turn it off or use a low setting.
Can a jigsaw cut through tile without breaking it?
Yes, with the right blade. You need a carbide-grit blade (no teeth). Use a low speed and let the saw do the work. Also, apply water or cutting oil to reduce dust and friction. It’s slower than a tile cutter, but works for small cuts and curved shapes.
