Bosch 2 608 619 175 rotary tool grinding/sanding supply Steel Sanding disc

Grinding disc Bosch R444 Expert for Metal 125mm is an X-LOCK-mounted polishing and grinding accessory designed for metalworking. The 125 mm disc has a 22.23 mm arbor hole and a coarse grit of 100, with a fibreglass backing and aluminium oxide abrasive for effective material removal and polishing on metal surfaces. Packaged in a cardboard box, it is intended for use with compatible angle grinders featuring the X-LOCK system.

Advantages

The Bosch Expert for Metal R444 offers stable backing from fibreglass and a durable aluminium oxide coating that provides efficient grinding and consistent polishing on metal. The 100 grit delivers a balance between stock removal and surface finish, while the X-LOCK mounting allows quick and secure attachment to compatible grinders. The standard 22.23 mm arbor size ensures fitment with common X-LOCK systems.

Suitable for

• Removing rust and scale from steel and ferrous metals
• Rough grinding and shaping of metal edges and welds
• Surface preparation before painting or coating
• Light deburring and smoothing of metal parts

Key specifications

• Brand: Bosch
• Model: Expert for Metal R444
• MPN: 2608619175
• EAN: 3165140960199
• Product type: Polishing / grinding disc
• Diameter: 125 mm
• Arbor (bore) diameter: 22.23 mm (X-LOCK)
• Grit: 100 (coarse)
• Backing material: Fibreglass
• Abrasive: Aluminium oxide
• Packaging: Cardboard box

How to use

Fit the disc onto an X-LOCK-compatible angle grinder, ensuring the 22.23 mm arbor locks securely. Operate the grinder at the manufacturer’s recommended speed and apply steady, even pressure while moving the disc across the metal surface. Use overlapping passes for uniform results and avoid excessive force to prevent overheating or premature wear of the disc. Replace the disc if the abrasive is worn or the backing is damaged.

Recommendations

Use appropriate personal protective equipment including safety goggles, gloves, ear protection and a dust mask. Check the grinder and disc for compatibility and damage before use, and follow the angle grinder manufacturer’s instructions and safety limits for speed and mounting.