Choosing the Right Saw Blade for High-Rise Demolition: Why 400mm Brazed Diamond Blades Are the Industry Standard

When it comes to high-rise building demolition, selecting the correct cutting tool isn't just about efficiency—it's about safety, precision, and minimizing downtime. For concrete, reinforced structures, and granite surfaces, a 400mm brazed diamond saw blade has become the go-to solution across global construction sites.

Key Selection Criteria: Material Hardness, Depth, and Environment

Before choosing any blade, consider three core factors:

• Material hardness: Concrete (MPa 30–60), granite (MPa 100–150), and rebar-inclusive slabs demand different grits and bonding agents.
• Cutting depth: A 400mm blade typically offers 70–100mm penetration—ideal for structural beams or floor slabs in mid-to-high-rise buildings.
• Environment: Wet vs. dry cutting affects blade life by up to 40%. Dry cutting increases heat buildup but reduces water logistics—choose based on site constraints.

Why Brazed Diamond Blades Outperform Traditional Welded Ones

“We switched from traditional welded blades to brazed ones on our Dubai skyscraper project—and saw a 30% reduction in blade replacements over 3 months.”
— Ahmed Rahman, Site Manager at Al-Farouq Construction, UAE

Real-World Performance: Data That Matters

In a recent field test conducted across 12 demolition projects in Europe and Southeast Asia, brazed diamond blades demonstrated:

• 22% faster cutting speed compared to standard welded blades (average time per meter: 3.2 min vs. 4.1 min).
• Extended service life of 60–80 hours per blade under wet conditions (vs. 45–55 hours for welded).
• Lower operator fatigue due to reduced noise and vibration—critical for long shifts in urban environments.

Practical Tips for Operators

Knowing when to stop cutting is as important as knowing how to start:

• Check for wear: If the diamond segments are worn down to 2–3mm above the steel core, replace immediately to avoid overheating.
• Cooling strategy: Use mist cooling (wet) for continuous cuts >1 hour; air cooling (dry) for short bursts (<15 mins).
• Prevent thermal cracking: Avoid sudden immersion in cold water after hot cutting—this can cause micro-fractures.

FAQs: Addressing Common Concerns

Q: Can I use this blade on both wet and dry surfaces?
A: Yes—our 400mm brazed blades are designed for dual-mode operation. Just ensure proper cooling in dry mode to extend life.

Q: How do I know if my blade needs replacement?
A: Monitor cutting performance—if you notice increased vibration, slower speed, or excessive dust, it’s time to inspect the blade head.

Q: Is this suitable for bridge demolition too?
A: Absolutely. Many civil engineering firms rely on these blades for bridge deck removal, pier cutting, and abutment work.