Common Causes of Burring & Chipping When Cutting Alu
2026.05.06
10:20
Cutting aluminum often brings two annoying problems: burring on the edge and material chipping or cracking. These issues not only ruin the appearance of aluminum profiles, sheets and frames, but also increase extra polishing work and even cause material waste.
If you are still troubled by rough cuts, chipped corners and stubborn burrs, this guide will show you the real causes and simple fixes.
1. Wrong Saw Blade Tooth Type
Cause
Using wood-cutting blades or ordinary flat-tooth blades to cut aluminum is the biggest mistake. These teeth easily pull aluminum material, stick aluminum chips and tear the edge, resulting in severe burrs and chipping.
Fix
Always use TCG (Triple Chip Grind) saw blades for aluminum. The alternate high-low tooth design cuts smoothly, reduces material pulling, and effectively prevents chipping and burrs.
2. Improper Number of Teeth
Cause
Too few teeth for thin aluminum → violent vibration, edge chipping
Too many teeth for thick solid aluminum → poor chip removal, overheating, sticking and burring
Fix
Thick aluminum bar / solid aluminum: 60–72 teeth
Window & door aluminum profile: 80–100 teeth
Thin aluminum sheet & decorative aluminum: 120 teeth or more
Follow the rule: Thick material = fewer teeth; Thin material = more teeth.
3. Unqualified Saw Blade Body & Runout
Cause
Low-quality blade substrate is thin and easy to deform. Poor concentricity makes the blade shake while rotating. Vibration is the main hidden cause of chipping and uneven cuts.
Fix
Choose aluminum saw blades with high-toughness steel base, stable hardness and no deformation at high speed. Ensure the blade runs without obvious shaking.
4. Incorrect Cutting Speed & Feed Rate
Cause
Feeding too fast will squeeze and tear the aluminum edge; feeding too slow will cause friction overheating, leaving hard burrs on the cut surface.
Fix
Keep a stable and moderate feeding speed, do not push hard or pause frequently during cutting. Match the machine speed to the aluminum thickness.
5. Blade Overheating & Aluminum Chip Sticking
Cause
Aluminum is soft and easy to adhere to the saw blade teeth. Accumulated aluminum scraps increase friction, generate high temperature, and form burrs and burnt edges.
Fix
Use saw blades with anti-stick coating (titanium plating or nitriding). Clean blade teeth regularly and use cutting fluid for continuous cutting.
6. Poor Machine Installation & Clamping
Cause
Loose workpiece clamping, unbalanced flange or mismatched bore size will cause blade offset and vibration, leading to chipping at every cut.
Fix
Firmly fix the aluminum profile before cutting. Make sure the saw blade bore size matches the machine spindle exactly, and keep the installation tight and balanced.
Conclusion
Burring and chipping when cutting aluminum are never accidental. The key solutions are:use TCG tooth blade → choose correct teeth count → stable blade body → reasonable cutting speed → correct installation and clamping.
Once you fix these points, you can get smooth, chip-free, burr-free aluminum cuts every time.
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