What is a Jigsaw? How it Works, and Types.
A jigsaw is a power tool used to cut complex or curved shapes. Jigsaw can be used on different surfaces like wood, plastic, ceramic, and fiberglass.
What is a Jigsaw
A jigsaw is a power tool that cuts using a short, straight blade that moves rapidly up and down in a reciprocating motion — in and out of the material with each stroke. Unlike a circular saw whose round blade spins continuously, the jigsaw’s blade moves in a straight line, plunging into and withdrawing from the material dozens of times per second. This action, combined with the tool’s relatively narrow blade, is what gives the jigsaw its defining characteristic: the ability to cut curves, shapes, and irregular lines that no other common saw can match.
The name comes from “jig” — an old word for a lively, irregular dance — reflecting the tool’s ability to follow winding, freeform paths through material.
How It Works
An electric motor drives a mechanism that converts rotational motion into the rapid up-and-down reciprocating movement of the blade. The blade extends downward through a slot in the tool’s flat base plate, called the shoe, which rests on the surface of the material being cut.
As you guide the saw along a line — straight or curved — the blade teeth cut on the upstroke, pulling cut material upward and out of the kerf (the slot left by the blade). This upward cutting action means the cleanest face of the cut is the underside of the material, while the top surface where the blade exits can experience some splintering. This is an important practical consideration when cutting finished surfaces.
Most modern jigsaws also offer an orbital action setting, where the blade sweeps slightly forward into the material on the upstroke in addition to moving up and down. This more aggressive cutting action removes material faster but leaves a rougher cut edge.
Key Components
Blade — Short, narrow, and replaceable. Blades vary in tooth count, tooth geometry, length, and material depending on what is being cut. Most modern jigsaws use a T-shank blade fitting, which clicks in and out without tools.
Shoe / Base Plate — The flat platform the tool rests on. Sits flush against the material surface and provides stability. Can be tilted for bevel cuts.
Orbital Action Selector — Controls how aggressively the blade sweeps forward on the upstroke. Settings typically range from zero (straight up and down, cleanest cut) to maximum orbital action (fastest, roughest cut).
Variable Speed Trigger — Controls blade speed in strokes per minute. Slower speeds for delicate materials, faster for aggressive cutting.
Speed Dial — Many jigsaws have a separate dial to set a maximum speed, with the trigger then varying within that range.
Blower — A small fan that directs air toward the cut line, blowing sawdust away so you can see the line you’re following.
LED Light — Illuminates the work surface and cut line, standard on most modern jigsaws.
Scrolling Knob — On some jigsaws, a knob on top allows you to rotate the blade direction independently of the tool body, making it easier to follow tight curves without repositioning your body.
Types of Jigsaw
Barrel Grip Jigsaw
The motor and body form a roughly cylindrical shape, and you grip the barrel of the tool like a flashlight. Offers excellent visibility of the cut line and very precise control for detailed work. Popular in Europe and among finish carpenters and woodworkers.
Top Handle Jigsaw
The most common style in North America. A D-shaped or bow-shaped handle sits on top of the tool body, with the trigger built into the handle. More comfortable for extended use and easier to apply downward pressure. Better for general cutting tasks.
Cordless Jigsaw
Battery-powered, integrating with a brand’s cordless platform. Modern cordless jigsaws on 18V–20V platforms perform very close to corded equivalents and offer the usual freedom of movement benefits. Popular for job site use where cutting sheet goods away from outlets is common.
Blade Types
The blade is everything with a jigsaw. Changing the blade changes what the tool can cut and how well it cuts it.
Wood Cutting Blades — The most common. Available in low tooth count for fast, rough cuts and high tooth count for slower, cleaner cuts. Teeth typically face upward.
Down-Cut Blades — Teeth face downward, so cutting happens on the downstroke rather than the upstroke. This means the clean face of the cut is on the top surface of the material — critical when cutting laminates, veneers, or any finished surface where the top must remain pristine.
Reverse Tooth Blades — Similar to down-cut blades, designed to minimize tearout on the top surface.
Metal Cutting Blades — Fine, closely spaced teeth for cutting sheet metal, steel pipe, aluminum, and other metals. Require slower speeds.
Bi-Metal Blades — Made from two metals — a tough steel body with high-speed steel teeth. More durable and versatile than single-material blades. Good for cutting through mixed materials including embedded nails.
Carbide Grit Blades — No teeth at all — instead, tungsten carbide particles are bonded to the blade edge. Used for cutting ceramic tile, glass, fiberglass, and other abrasive materials that would destroy toothed blades quickly.
Laminate Blades — Specialized for cutting laminate flooring and melamine-coated boards cleanly.
Flush Cut Blades — The blade extends to the very front edge of the shoe, allowing cuts right up against a wall or surface with no gap.
What a Jigsaw Can Cut
With the right blade, a jigsaw is remarkably versatile:
- Softwood and hardwood lumber
- Plywood and MDF
- Laminate and melamine
- Metal sheet, pipe, and tubing
- Ceramic and porcelain tile
- Fiberglass
- Plastic and acrylic
- Rubber and foam
- Drywall
- Countertops (including laminate and solid surface)
- Thin stone
Types of Cuts
Curved Cuts — The jigsaw’s defining capability. Following a drawn curve, circle, or freeform shape through material is where no other portable saw comes close.
Straight Cuts — A jigsaw can make straight cuts, though it is less efficient and less naturally accurate at this than a circular saw. A straight edge guide or fence helps maintain accuracy.
Plunge Cut — Starting a cut in the middle of a panel without access to an edge. The front edge of the shoe is rested on the material, the blade is tilted up clear of the surface, and the running tool is slowly pivoted down until the blade penetrates the material. Used for cutting sink openings in countertops, access holes in floors and walls, and interior cutouts generally.
Bevel Cut — The shoe is tilted to an angle, producing a cut face that is not perpendicular to the material surface. Useful for decorative edges and joining pieces at an angle.
Circle Cuts — Using a circle-cutting guide attachment, a jigsaw can cut a perfect circle by pivoting around a fixed center point.
Pocket Cut — Another term for a plunge cut, commonly used when cutting rectangular openings such as for electrical boxes or HVAC grilles.
Orbital Action Explained
Most jigsaws offer selectable orbital action, usually with three or four settings:
Setting 0 (No orbital action) — The blade moves purely up and down. Slowest cutting but cleanest, most accurate result. Best for curves, delicate materials, metal, and any cut where finish quality matters.
Setting 1–2 (Moderate orbital action) — The blade sweeps slightly forward on the upstroke. Faster material removal with a somewhat rougher finish. Good for general wood cutting.
Setting 3–4 (Maximum orbital action) — The blade sweeps aggressively forward. Fastest possible cutting, roughest finish. Best for rapid rough cuts in thick softwood where speed matters more than quality.
Understanding and using orbital action correctly makes a significant difference in both cutting speed and cut quality.
Corded vs. Cordless Jigsaws
Corded jigsaws deliver consistent power for extended cutting sessions and are preferred for heavy-duty use in a workshop setting — cutting thick hardwoods, long sessions with metal, or high-volume production work.
Cordless jigsaws on modern 18V platforms are excellent for most tasks and genuinely match corded performance for typical cutting jobs. Their portability is a real advantage when cutting large sheet goods on sawhorses, working on a job site, or cutting in a location where a cord would be awkward to manage.
Safety
The jigsaw is one of the safer power saws because the blade is short, mostly enclosed by the shoe, and moves relatively slowly compared to a circular saw blade. However, proper practice still matters:
- Keep fingers well clear of the blade and the underside of the material
- Support the material properly — unsupported offcuts can grab the blade
- Use the correct blade for the material — the wrong blade binds, overheats, and breaks
- Let the tool reach full speed before entering the material
- Do not force the saw — feed it at the pace the blade naturally wants to cut
- Be aware of what is below the material before cutting — pipes, wires, and fingers have all been found by jigsaw blades
- Wear eye protection — the blower directs dust and chips toward you
The Bottom Line
The jigsaw occupies a unique and irreplaceable place in the tool kit. No other common portable saw can follow a curve, cut an interior opening, or handle the variety of materials a jigsaw can. It rewards a steady hand and a patient feed rate with surprisingly clean, accurate results — and in the hands of a skilled user, it is capable of genuinely artistic work in wood and other materials.
