Sanding disc Bosch R444 Expert for Metal, 1 pc

The Bosch R444 Expert for Metal sanding disc delivers a consistent, professional finish on metal surfaces. Built on a stable vulcanised fibre backing, the disc provides steady grinding performance. Its semi-friable aluminium oxide abrasive is formulated for metalworking and is suitable for deburring, weld preparation and blending on carbon steel, mild steel, aluminium, non-ferrous metals and cast iron. The disc is intended to remove discolouration, stock and surface imperfections and is compatible with angle grinders.

Advantages

The vulcanised fibre backing ensures high work stability and uniform pressure during sanding. Semi-friable aluminium oxide grit provides efficient material removal on various metals while maintaining consistent abrasive action. The abrasive is bonded with fully synthetic resin to secure grit retention and prolong service life under normal metalworking conditions.

Suitable for

• Deburring edges and parts on carbon and mild steel
• Preparing surfaces for welding and painting
• Removing rust, scale and discolouration from metal surfaces
• Blending weld seams and smoothing cast iron or non‑ferrous metal parts

Key specifications

• Abrasive type: semi-friable aluminium oxide
• Backing: vulcanised fibre
• Bonding: fully synthetic resin
• Intended use: metalworking (carbon steel, mild steel, aluminium, non‑ferrous metals, cast iron)
• Compatibility: angle grinders
• Pack quantity: 1 piece

How to use

Mount the disc on a compatible angle grinder following the grinder manufacturer's instructions and ensure the grinder is disconnected from power while fitting. Select an appropriate grit and safe rotation speed for the task, then apply steady, even pressure while sanding across the metal surface. Move the disc continuously to avoid overheating and to achieve uniform material removal. After use, allow the disc to cool before storage and inspect for wear or damage before reusing.

Usage recommendations

Use appropriate personal protective equipment (eye protection, gloves, hearing protection and respiratory protection as needed). Match grit and speed to the metal type and task; start with coarser grit for heavy stock removal and progress to finer grit for blending. Avoid excessive pressure and keep the disc in motion to reduce heat buildup and prolong disc life.