A rough cutter that needs a firm grip
A reciprocating saw cuts quickly and tolerates awkward angles, which makes it a favorite for remodeling and demolition. It also vibrates hard and can jump if the blade catches. Good results come from a stable stance, the right blade and the discipline to check what is behind the cut before the blade goes in.
Choose the blade for the material
Blades are matched to the job, and the wrong one will cut slowly, overheat or break.
- Wood blades have larger, widely spaced teeth that clear chips quickly.
- Wood with nails blades are more durable and designed to cut through embedded fasteners, which is common in remodeling.
- Metal blades have finer teeth, and the right tooth count depends on the thickness. As a general idea, thin metal needs finer teeth so that several teeth stay in contact with the material, while thick metal tolerates coarser teeth.
- Pruning blades have large aggressive teeth for green wood.
Blade length also matters. A longer blade reaches deeper, but it flexes more. Use the shortest blade that does the job, since reciprocating blade selection is mostly about matching tooth count and toughness to the material.
Always unplug the saw or remove the battery before swapping blades, and check that the blade is seated fully in the clamp.
Keep the shoe in contact
The shoe, the metal plate at the front, is the key to control. Press it firmly against the material while cutting. If the shoe floats free, the saw bucks and the blade chatters, which wastes energy and can bounce the tool out of your hands. Holding the shoe against the surface also spreads wear along the blade and steadies the cut.
Adjustable shoes let you shift the blade position to use unworn sections of the blade. Rotate or reposition the shoe periodically if your saw allows it.
Grip, stance and vibration
- Use both hands: one on the rear handle and one on the front of the body or a designated grip area.
- Keep your balance with feet planted, and avoid overreaching on ladders. Cutting while off balance is one of the commonly reported ways to get hurt.
- Let the saw’s weight and the blade do the cutting. Pushing harder rarely helps and can cause the blade to bind or snap.
- Take breaks. Sustained vibration is tiring and, over long periods, can contribute to hand and arm problems, so give your hands time to recover.
Gloves can help comfort, but make sure they fit snugly with no loose parts that could catch.
Starting a cut
Start at a slow speed if your saw has variable speed, or squeeze the trigger gently. Rest the shoe against the work, then begin the cut. Starting at full speed with the blade not in contact may cause it to skip along the surface. When the blade is through, ease up and let it exit smoothly. Don’t let the blade bind. If it jams, release the trigger and wait for the blade to stop before freeing it.
Cutting into the middle of a surface calls for plunge cuts, and plunge-style starts with a reciprocating saw carry extra kickback risk, so practice on scrap before trying on a finished surface.
Demolition cuts
Reciprocating saws excel at cutting through old framing, trim and fasteners, but the work calls for caution.
- Plan the cut sequence so that falling pieces, sagging boards or structures are supported. Cutting a load-bearing member can be dangerous, and it should not be done without knowing what the member supports. If you are unsure, consult a qualified professional first.
- Wear safety glasses, hearing protection, a dust mask or respirator and sturdy gloves and footwear. Old buildings can have dust containing lead or asbestos. If you suspect either, stop and seek guidance instead of cutting.
- Keep bystanders clear of the cutting area and falling debris.
- Cut pieces into smaller sections so they can be removed safely.
Cutting through nails is common, but a nail can heat, flex or break a blade, so use a blade designed for it and avoid sideways pressure.
Hidden hazards behind surfaces
The most dangerous aspect of a reciprocating saw is what you cannot see. Before cutting into a wall, floor or ceiling, think about what might be inside.
- Electrical wiring. Cutting a live wire can cause shock or fire. Turn off power at the breaker for the circuit where possible and verify with a proper tester. Use an insulated grip, and consider that cables may not run where you expect. A stud finder use pass can help locate framing and some sources of metal or live wiring, but it is not a guarantee.
- Plumbing. Cutting a supply or drain line can flood a house. Shut off water where appropriate.
- Gas lines. Treat any suspected gas line as a reason to stop and call a qualified professional.
- Fasteners and metal. Screws, nails, and anchors will dull and may break blades.
- Framing and other structure. Know what a cut will weaken before you make it.
Where possible, open a small inspection hole with hand tools to look first.
Corded power and cords
When working with a corded saw, keep the cord out of the cutting path and behind you. Check the cord for damage, and use an appropriately rated extension cord, because extension cords that are too light can overheat. Cordless saws avoid cord hazards but may bog down as the battery depletes, so swap packs when the saw slows.
After the cut
Wait for the blade to stop before setting the saw down, since blades can coast. Blades and freshly cut metal can be hot, so let them cool before handling. Remove the battery or unplug the saw for storage, and wipe off dust.
This is general information, not professional trade advice, and your saw’s manual governs its specific use.