Bosch X440 Expert for Metal Fibre Disc 125 mm Grit 60 Zirconia Alumina 2608619210

On a busy fabrication floor, a welder reaches for this Bosch fibre disc to smooth a heavy steel joint before painting. The X440 Expert for Metal disc bites into the workpiece with controlled aggression, leaving a clean, uniform finish without excessive heat build-up. Its zirconia alumina abrasive stays sharp longer than standard aluminium oxide, so you spend less time swapping discs and more time grinding.

Key specifications

• Disc diameter: 125 mm
• Grit size: 60 (medium-coarse)
• Abrasive material: Zirconia alumina
• Backing: Vulcanised fibre
• Bonding agent: Full synthetic resin
• Bore diameter: 22.23 mm
• Maximum speed: 12,250 rpm / 80 m/s
• For use on: Metal (steel, stainless steel, non-ferrous)
• Recommended tool: Angle grinder
• Pack quantity: 1 piece

Why choose it

The X440 Expert for Metal is engineered for demanding grinding, deburring, and weld removal tasks. Its self-sharpening zirconia alumina grains fracture under pressure to expose fresh cutting edges, delivering consistent performance throughout the disc's life. The vulcanised fibre backing provides excellent tear resistance and flexibility, allowing the disc to conform to contours while maintaining stability at high speeds. The full synthetic resin bond ensures strong grain retention, reducing the risk of shedding and improving safety.

Ideal use cases

• Removing weld seams and spatter on structural steel
• Deburring sharp edges after cutting or machining
• Surface preparation before painting or coating
• Grinding down rough castings or forgings
• Blending and finishing on stainless steel fabrications

Good to know

This disc is part of Bosch's Expert series, designed for professional users who demand high material removal rates and long service life. Always use with a suitable backing pad and guard on your angle grinder. Check that your tool's speed does not exceed 12,250 rpm. Store discs flat in a dry place to prevent warping. For best results, maintain a 15–30° angle to the workpiece and apply moderate pressure.