Circular Saw Blade Chipping Teeth? Causes and Prevention

When Good Blades Go Bad

Carbide teeth on circular saw blades aren't cheap, and watching them chip or break is frustrating. Sometimes blades fail prematurely; sometimes we cause the damage ourselves. Here's how to prevent it and get maximum life from your blades.

Why Blades Chip

Hitting hidden objects:

• Nails and screws in reclaimed timber
• Staples from packaging
• Stone and sand embedded in boards
• Metal plates, brackets, or straps

This is the number one blade killer. Always check material before cutting.

Incorrect blade for material:

• Using wood blade on materials with abrasives (cement board, drywall)
• Wrong tooth count for the cut
• Standard blade on engineered stone or tiles

Feed rate problems:

• Pushing too fast - overwhelms teeth, causes chipping
• Pushing too slow - friction heat, damages carbide
• Let the blade cut at its own pace

Pinching and binding:

• Material closes on blade during cut
• Unsupported offcut drops, twists blade
• Causes sudden shock load on teeth

Blade quality:

• Cheap blades use inferior carbide
• Poor brazing fails under load
• Inconsistent tooth geometry

Prevention Strategies

Before cutting:

• Check material for metal with detector or magnet
• Inspect reclaimed timber carefully
• Support material properly to prevent pinching
• Position cut so offcut falls away freely

Blade selection:

• Use demolition blades for uncertain material
• Dedicated blades for specific materials
• Higher tooth count for cleaner cuts in known-clean material
• Lower tooth count for rough, fast cuts

Cutting technique:

• Steady, consistent feed rate
• Let the blade reach full speed before contact
• Don't force the cut
• Retract fully before stopping the blade

Blade Types and Applications

General purpose:

• Medium tooth count (24-40 teeth)
• Good for most timber and sheet goods
• Balance of speed and finish

Fine finish:

• High tooth count (60-80+ teeth)
• Slower cutting, cleaner edge
• For melamine, veneered boards, finished work

Demolition/nail cutting:

• Special carbide formulation
• Designed to handle embedded metal
• Essential for reclaimed timber

Specialist blades:

• Fiber cement blades - for cement board
• Aluminium blades - non-ferrous metal
• Laminate blades - reduced chipping

Find the right blade in our power tool accessories.

Signs Your Blade Needs Replacing

• Multiple chipped or missing teeth
• Visible wear on tooth faces
• Blade requires more force to cut
• Burning marks on cut material
• Rougher cut quality than when new
• Blade wanders or doesn't track straight

Can Damaged Blades Be Sharpened?

Professional resharpening services can:

• Sharpen worn (not chipped) teeth
• Replace individual damaged teeth (sometimes)
• Re-tension warped blades

Worth it for:

• High-quality, expensive blades
• Large diameter blades
• Specialist blades

Not worth it for:

• Budget blades (cheaper to replace)
• Multiple missing teeth
• Damaged blade body

Blade Care and Storage

• Store in blade case or with tooth covers
• Don't let blades knock against each other
• Keep dry to prevent corrosion
• Clean resin buildup with appropriate solvent
• Check for damage before installing

The Bottom Line

Blade chipping is usually preventable. Check materials before cutting, use the right blade for the job, support your work properly, and don't force the cut. Quality blades on your DeWalt or Makita saw are an investment - protect them with good practice and they'll give you hundreds of clean cuts.