OEM 4 Inch Concrete Cutting Blade Exporter & Factories

Standard nominal 4-inch blades measure 100mm or 105mm in outer diameter, with 4.5-inch measuring 115mm. Standard bore sizes include 20mm (common in European and Asian angle grinders), 22.23mm (7/8" standard in North America), or integrated brass reduction bushings (22.23mm to 20mm, 20mm to 16mm / 5/8"). We also supply integrated 5/8"-11 threaded zinc or steel flanges for direct attachment to high-speed hand grinders.

Yes. Laser welding fuses the segment directly into the core using a beam of concentrated coherent light, producing a high-strength metallurgical joint that withstands temperatures up to 800°C without segment loss. However, when cutting dry, operators should avoid forced feed pressure and let the blade spin unloaded every 10–15 seconds to allow cooling air circulation.

Glazing occurs when the metal bond is too hard for the concrete aggregate being cut. The metal matrix does not erode fast enough to reveal new diamond layers, leaving diamond tips polished flush with the bond surface. Glazed blades can be dressed by making several cuts into an abrasive material like an alumina dressing stick, asphalt, or an abrasive concrete cinder block.

For custom OEM branding (custom laser logo engraving on blade cores, custom color coating, and branded retail color boxes), our standard MOQ is typically 200–500 units per specification. For standard neutral-packaged inventory blades, we can supply test sample orders starting from 50 units to support initial market qualification.

We sign strict Non-Disclosure Agreements (NDAs) with our OEM partners. Proprietary bond formulations, segment geometries, and branded artwork files remain secure. Where volume milestones are met, we offer geographic exclusivity agreements for designated product tiers within the distributor's territory.

Every shipment includes comprehensive quality certificates: Raw Material Ingot Mill Test Reports, Core Hardness & Tensioning Inspection Sheets, Laser Weld Shear Test Certificates per EN13236, Dynamic Balancing Verification, SGS/TÜV conformity declarations, Commercial Invoices, Packing Lists, and Certificates of Origin.