Symptoms
- Blade snaps partway through a cut
- Breaks happen repeatedly even with new blades
- Blade bends visibly before it breaks
- Cutting metal or nails increases breakage
Likely causes
- CommonWrong blade type for the material (wood vs metal vs demo)Metal-cutting blades are thinner and more brittle than wood blades and can snap if flexed.
- CommonTwisting or prying with the blade still in the cutThese blades aren't designed to be used as pry bars.
- CommonWorkpiece not held firmly, causing excess vibrationA loose or vibrating workpiece stresses the blade with every stroke.
- PossibleHitting hidden nails or hard material unexpectedlyDemo-style blades handle nails better than standard wood blades.
- PossibleBlade not fully seated in the shoe/clampA loose blade flexes more than it should.
What to do
- Match the blade to the job: wood, metal, or demolition blades are built differently.
- Clamp or brace the workpiece firmly so it doesn't bounce or vibrate during cutting.
- Let the blade cut on the push and pull stroke without twisting or prying sideways.
- Use a demolition-rated blade if you expect to hit nails or mixed materials.
- Confirm the blade is fully seated in the clamp before starting.
- Let the saw's shoe rest against the material to help stabilize the blade and reduce flex.
Tools and parts
- Reciprocating saw
- Correct blade for material
- Clamps
Reciprocating saw bladesSearch: “reciprocating saw blades wood metal demolition”
When to call a pro
If blades keep breaking despite the right type and careful use, a tool repair shop can check the blade clamp for wear.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.