How to use a reciprocating saw — choosing blades by TPI, cutting through nail-embedded timber, and knowing what is behind the wall.
A reciprocating saw is a demolition tool, and it is brilliant at it. It cuts through timber, metal, plastic pipe, plasterboard and old nail-riddled joists — often all in the same cut — and it does it in places nothing else will reach.
It is not a precision tool. The cut is rough, the blade wanders, and the edge will need cleaning up. That is fine, because that is not what it is for.
Most people who find one frustrating are making the same mistake: they hold the blade against the work instead of the shoe.
The flat metal plate at the front of the tool — the shoe — is meant to be pressed firmly against whatever you are cutting. Do that, and the saw braces itself against the work and the blade does the cutting. Fail to do it, and the whole tool bucks and hammers, the blade flexes and heats, and it snaps.
That, plus picking the right blade, is most of what there is to know. 💡
Alt text: “Reciprocating saw cutting a timber stud with the shoe pressed firmly against the workpiece”
- What it is good at — and what it is not
- The shoe — the technique that changes everything
- Choosing blades: the TPI rule
- Blade length and why it matters
- Orbital action and speed
- Safety and what is behind the wall
- Step by step
- Plunge cutting
- Cutting different materials
- Why blades snap and bend
- Common mistakes (and how to fix them)
- Pro tips worth knowing
- What I recommend
- Frequently asked questions
- Your final checklist
What It Is Good At — And What It Is Not
| Job | Reciprocating saw? | Better tool if not |
|---|---|---|
| Demolition and strip-out | ✅ Ideal | — |
| Nail-embedded timber | ✅ Its speciality | — |
| Cutting in tight or awkward spots | ✅ Excellent | — |
| Flush-cutting pipes or posts | ✅ Very good | — |
| Pruning branches | ✅ Surprisingly good | — |
| Straight, clean crosscuts | ❌ No | Miter or circular saw |
| Curves in sheet material | ⚠️ Rough | Jigsaw |
| Anything that will be seen | ❌ No | Almost anything else |
The thing that makes it special is nail-embedded wood. Reclaimed timber, old stud walls, decking with hidden screws, pallets — material that would destroy a circular saw blade or a jigsaw blade instantly. A bi-metal demolition blade cuts straight through nails and screws and carries on.
For clean, accurate cuts, use the right tool: a miter saw for crosscuts, a circular saw for sheets, or a jigsaw for curves.
The Shoe — The Technique That Changes Everything
This is the single most useful thing in this guide.
The blade moves back and forth very fast. Every stroke pushes the tool one way and then the other. If nothing is bracing the tool, that energy shakes the saw — and you. The blade bounces in and out of the cut, hammering rather than cutting.
Press the shoe firmly and flat against the workpiece, and everything changes. The tool is now braced against the material, so the reciprocating force pushes the shoe into the work rather than shaking the tool. The blade stays engaged and cuts smoothly.
Other benefits of using the shoe properly:
- Blades last far longer, because they are not flexing on every stroke.
- Much less vibration through your arms, which matters on a long job.
- More control, so the cut goes where you intended.
- Less noise and less chatter against the workpiece.
Most saws have an adjustable shoe. Sliding it in or out changes which part of the blade does the work — useful for spreading wear along a blade rather than burning out one section.
Choosing Blades: The TPI Rule
TPI means teeth per inch. It is the main number on any blade, and there is a simple rule that tells you what you need.
| TPI | Cut | Best for |
|---|---|---|
| 3–6 TPI | Very fast, very rough | ✅ Thick timber, pruning, demolition |
| 6–10 TPI | Fast, rough | ✅ General wood, nail-embedded timber |
| 10–14 TPI | Moderate | ✅ Thick metal, mixed material |
| 14–18 TPI | Slower, neater | ✅ Thinner metal, pipe |
| 18–24 TPI | Slow, finest | ✅ Thin sheet metal, conduit |
| Carbide / grit edge | Abrasive | Cast iron, fibre cement, masonry |
Blade material
- High carbon steel (HCS) — cheap, flexible, fine for clean softwood. Dulls quickly and will not survive nails.
- Bi-metal — the sensible default. A tough spring-steel body with hardened teeth, so it flexes without snapping and cuts metal. This is what “demolition” or “wood with nails” blades usually are.
- Carbide-tipped — expensive, lasts far longer in abrasive or hard material. Worth it for cast iron, fibre cement or heavy repeat use.
If you buy one assortment, buy bi-metal in a range of TPI. It covers almost everything a home user encounters.
Blade Length and Why It Matters
Length is not just about reach — it affects safety and control.
Too short and the blade cannot pass fully through the material, so you cannot complete the cut cleanly.
Too long and two problems appear. The excess blade whips and flexes, making the cut wander. And more importantly, the blade extends further past the material than you can see — straight into whatever is behind it.
The working rule: the blade should be long enough to extend a little past the far side of the material at the end of each stroke, and no longer than necessary.
Orbital Action and Speed
Many reciprocating saws have an orbital setting, and knowing when to use it makes a real difference.
Straight action — the blade moves purely back and forth.
Orbital action — the blade also moves in a slight oval, so it swings forward into the cut on the cutting stroke and pulls back on the return.
| Material | Orbital | Speed |
|---|---|---|
| Thick timber | ✅ On — much faster | High |
| Demolition, rough work | ✅ On | High |
| Green branches | ✅ On | High |
| Metal of any kind | ⚠️ Off | ✅ Low |
| Plastic pipe | ⚠️ Off | Low — heat melts it |
| Neater cuts in wood | Off | Moderate |
Speed matters most on metal. Cutting metal fast generates heat, and heat destroys the teeth quickly. Run slow, let the blade cut, and add a little cutting oil if you are working through anything substantial. A blade that turns blue has been overheated and is finished.
Safety and What Is Behind the Wall
The blade is exposed, it moves fast, and it often goes where you cannot see. A few habits cover almost everything.
- Always use two hands. These tools have real torque and a lot of vibration. One-handed use is how they get away from you.
- Check for services before cutting into any structure. Cables, water, gas, waste. Use a detector, and think about what is likely to be there.
- Isolate the circuit if you are cutting anywhere near wiring, and turn off the water if pipes are a possibility.
- Never cut above your head if you can avoid it. Debris falls, the tool is heavy, and control is poor with your arms raised.
- Watch out for the hot blade. After cutting metal, blades are hot enough to burn. Let them cool before changing.
- Support what you are cutting so it cannot pinch the blade or fall unpredictably.
- Eye protection and gloves. Demolition throws splinters, nails and grit.
- Keep the cord clear of the blade on a corded model — an easy thing to cut through.
- Wait for the blade to stop before withdrawing it or setting the tool down.
The reciprocating saw’s greatest strength — cutting through anything, anywhere, including things you cannot see — is also exactly what makes it the tool most likely to find a cable you did not know was there.
Step By Step
Step 1 — Work out what you are cutting through
Material, thickness, and whether there are nails or screws. Then check what is behind it.
Step 2 — Choose the blade
Right TPI for the thickness, right material, right length — long enough to pass through, no longer.
Step 3 — Fit the blade securely
Most saws have a tool-free clamp. Tug it to confirm it is locked. A blade that comes loose mid-cut is genuinely dangerous. Note that blades can usually be fitted teeth-up or teeth-down — teeth-down for normal cutting, teeth-up for flush cuts and awkward angles.
Step 4 — Set orbital action and speed
Orbital on for wood, off for metal and plastic. Speed high for wood, low for metal.
Step 5 — Secure the workpiece
Clamp it if it can move. Support both sides so the cut cannot pinch.
Step 6 — Put on protection
Eyes, ears, gloves.
Step 7 — Press the shoe firmly against the work
Flat, firm contact before the blade touches anything.
Step 8 — Start slowly, then build up
Begin at low speed so the blade does not skip across the surface, then increase once the cut is established.
Step 9 — Let the saw do the work
Steady pressure, keeping the shoe planted. Pushing hard does not speed it up — it bends the blade and slows the stroke.
Step 10 — Support the offcut
Especially on branches and pipes, where a falling offcut can pinch the blade or land on something.
Step 11 — Let the blade stop before withdrawing
Plunge Cutting
Starting a cut in the middle of a surface, with no edge to begin from — useful for cutting an opening in plasterboard, floorboards or panelling.
- Confirm what is behind. Non-negotiable for plunge cuts, because you cannot see where the blade is going.
- Use a short blade so it protrudes as little as possible past the material.
- Rest the tool on the tip of the shoe, with the blade angled almost parallel to the surface and not touching it.
- Start the saw at low speed.
- Slowly pivot the tool on the shoe so the blade tip contacts the surface and gradually works its way in.
- Once the blade is through, bring the tool upright, plant the shoe, and cut normally.
Do not attempt a plunge cut by pushing the blade straight in. The blade will skate across the surface, and it can snatch hard enough to wrench the tool sideways.
Cutting Different Materials
Timber with nails
The tool’s speciality. Use a bi-metal demolition blade, around 6–10 TPI, orbital on. Expect the blade to dull faster than in clean wood — that is the trade.
Clean timber
Fast and easy, but rough. Cut on the waste side and allow for tidying up afterwards.
Metal pipe and conduit
Higher TPI, orbital off, low speed. Support the pipe both sides so it cannot pinch or spin. A little cutting oil helps a lot.
Plastic pipe
Low speed. Too fast and friction melts the plastic, which welds behind the blade and binds it.
Pruning branches
A coarse pruning blade works genuinely well on green wood. Cut from underneath first on anything substantial so the bark does not tear when the branch drops, then finish from above.
Cast iron and fibre cement
Carbide or grit-edge blades. Fibre cement produces silica dust — respirator and dust control needed.
Flush cutting
Fit the blade teeth-up and use a flexible bi-metal blade, letting it bend flat against the surface. Useful for cutting bolts, pipes or posts level with a floor or wall.
Why Blades Snap and Bend
| Problem | Cause | Fix |
|---|---|---|
| Blade snapped | Shoe not planted; flexing each stroke | ✅ Press the shoe firmly |
| Blade bent | Forcing, or twisting in the cut | ✅ Steady pressure, keep it straight |
| Blade snatching | ⚠️ Too few teeth in the material | ✅ Higher TPI |
| Blade blue and blunt | Too fast on metal; overheated | ✅ Lower speed, orbital off, oil |
| Cut wandering badly | Blade too long, whipping | ✅ Shorter blade, plant the shoe |
| Tool bouncing violently | ⚠️ Shoe not in contact | ✅ Press it flat and firm |
Notice how many of these have the same fix. Blade problems on a reciprocating saw are overwhelmingly a shoe-contact problem, a TPI problem, or a speed problem — and all three are free to correct.
Common Mistakes (And How to Fix Them)
Mistake 1 — Not pressing the shoe against the work
The fix: firm, flat contact. This single habit fixes vibration, control and blade life.
Mistake 2 — Cutting into a wall without checking
The fix: detector, isolate the circuit, and remember the blade goes further than you can see.
Mistake 3 — Using a blade far longer than needed
The fix: shortest blade that passes through. Long blades whip and reach into cavities.
Mistake 4 — Coarse blade on thin metal
The fix: at least three teeth in the material. Coarse teeth hook and snatch.
Mistake 5 — Full speed on metal
The fix: slow speed, orbital off, cutting oil. Heat is what kills blades.
Mistake 6 — Not checking the blade is locked in
The fix: tug it before every cut.
Mistake 7 — Forcing the cut
The fix: steady pressure. Pushing harder bends the blade and slows the stroke.
Mistake 8 — Plunging straight in
The fix: pivot on the shoe tip, or drill a starter hole.
Mistake 9 — One-handed use
The fix: two hands, always. There is a lot of vibration and torque.
Mistake 10 — Using it for cuts that will be visible
The fix: a different saw. This is a demolition tool.
Pro Tips Worth Knowing
- Slide the shoe in or out to use a fresh part of the blade. Blades wear in one spot; adjusting the shoe moves the working section and effectively gives you a new blade.
- Fit the blade teeth-up for awkward angles. It often makes an impossible position easy, and it is how flush cuts are done.
- Buy blades in bulk. They are consumable, and running a dull one is slower, hotter and more likely to snap.
- Cut oversized in demolition. Precision costs time and gains nothing when the material is going in a skip.
- A cordless model is far more useful for demolition, where you are climbing over rubble and working in tight corners.
- Mark the blade with tape as a depth guide when cutting into structure — a visual reminder of how far it protrudes.
- Take the door off the room first. Sounds trivial; a reciprocating saw needs swing room and doors always end up in the way.
- Wear gloves with grip. Vibration is the fatigue factor on long jobs, and a tired grip is a loose grip.
- Watch for hidden pipes in floor joists. Notches and holes in joists frequently carry cables and pipes right where you want to cut.
- Keep a magnet handy in demolition. Sweeping for dropped nails and screws afterwards saves punctured tyres and feet.
What I Recommend
A reciprocating saw is only as good as the blade in it, and the blade you need changes with every material. An assortment covering wood, metal and mixed work means you fit the right one instead of forcing the wrong one.
DEWALT Reciprocating Saw Blades, 10-Piece Bi-Metal Set with Case
🏆 Best Blade AssortmentA ten-piece bi-metal combination set in sizes from 6 to 9 inches, supplied in a case. Bi-metal is the right default — a flexible body with hardened teeth, so blades survive nails and screws instead of shattering, and cut metal as well as timber.
- ✅ Mixed set so you can match TPI to the material instead of forcing the wrong blade
- ✅ Bi-metal construction flexes rather than snapping, and survives hidden nails
- ✅ Range of lengths — use the shortest that passes through, which is the safe choice
- ✅ Case keeps them organised, so you actually change blades rather than persevering
- ✅ Handles wood, metal and demolition from one box
Prices and availability change often — check Amazon for the current price.
Frequently Asked Questions
Why does my reciprocating saw bounce so much?
Because the shoe is not pressed against the work. The blade moves back and forth very fast, and if nothing braces the tool, that force shakes the saw instead of driving the cut. Press the flat metal shoe firmly and flat against the material before the blade touches it — the tool then braces itself and the blade cuts smoothly. This is the single most common reason people find the tool unpleasant to use.
What TPI blade do I need?
Match it to material thickness using the three-tooth rule — at least three teeth should be in contact with the material at all times. Thick timber and pruning want 3–6 TPI, general wood and nail-embedded timber 6–10, thick metal 10–14, and thin sheet metal or conduit 18–24. Too few teeth engaged means each tooth takes a huge bite, which makes the blade snatch and can bend or snap it.
Why do my blades keep snapping?
Almost always because the shoe is not planted, so the blade flexes on every stroke until it fatigues and breaks. Forcing the cut and twisting the tool sideways also bend blades. Press the shoe firmly, use steady rather than heavy pressure, keep the blade straight in the cut, and choose the shortest blade that will pass through — long blades whip and flex far more.
Can I cut metal with a reciprocating saw?
Yes, with the right setup. Use a bi-metal blade with a high enough TPI for the thickness, switch orbital action off, and run at low speed — heat is what destroys blades in metal. Support the workpiece on both sides so it cannot pinch or spin, and a little cutting oil extends blade life considerably. A blade that has turned blue has overheated and is finished.
How do I start a cut in the middle of a surface?
Either drill a starter hole big enough to pass the blade through — the easiest and safest option, and it lets you look inside first — or plunge cut by resting the tool on the tip of the shoe with the blade nearly parallel to the surface, starting slowly, and pivoting so the blade works its way in. Never push the blade straight in; it will skate and can snatch the tool sideways.
Is a reciprocating saw good for accurate cuts?
No, and it is not meant to be. The blade is unsupported at its far end, it flexes, and the cut comes out rough with some wander. That is fine for demolition, strip-out and rough work, which is what the tool is for. For clean crosscuts use a miter saw, for sheet material a circular saw with a guide, and for curves a jigsaw.
Your Final Checklist
- Identify the material and whether it contains nails or screws
- Check what is behind — cables, pipes, gas, ducting
- Isolate circuits or water if there is any doubt
- Match TPI to thickness — three teeth in the material
- Choose the shortest blade that passes fully through
- Bi-metal for anything with nails
- Tug the blade to confirm the clamp is locked
- Orbital on for wood, off for metal and plastic
- Low speed on metal, high on timber
- Secure the workpiece, support both sides of the cut
- Eyes, ears, gloves
- Press the shoe flat and firm before the blade touches
- Two hands, steady pressure — never force it
- Support the offcut so it cannot pinch or fall badly
- Let the blade stop before withdrawing or setting down
Next in this series: how to use an angle grinder and how to use a jigsaw.
