Sanding Disc Bosch R444 Expert for Metal, 1 pc

Bosch R444 Expert for Metal sanding disc, supplied as a single unit, is designed for metalworking tasks including deburring, weld preparation and surface blending. The disc uses a semi-friable aluminium oxide abrasive bonded with fully synthetic resin to a stable vulcanised fibre backing, delivering steady grinding performance and consistent material removal on a variety of metals. It is compatible with appropriate angle grinders and sanding holders and is intended for use where controlled stock removal and improved surface finish are required.

Advantages

The vulcanised fibre backing provides dimensional stability and supports even pressure distribution during use, reducing chatter and improving control. Semi-friable aluminium oxide grit maintains cutting performance on metal substrates and aids progressive wear for steady finish quality. The synthetic resin bonding secures the abrasive for consistent sanding results and reliable durability during typical metal finishing operations.

Suitable for

• Deburring edges and removing burrs from cut metal
• Preparing weld joints and cleaning weld seams
• Blending and smoothing surfaces on carbon and mild steel
• Removing discolouration, oxidation and light surface corrosion
• Stock removal and surface preparation on aluminium, non-ferrous metals and cast iron

Key specifications

• Abrasive type: semi-friable aluminium oxide
• Backing material: vulcanised fibre for enhanced stability
• Bonding: fully synthetic resin
• Pack quantity: single disc
• Typical applications: deburring, weld preparation, blending, stock removal

How to use

Attach the sanding disc to a compatible angle grinder or sanding holder following the tool manufacturer’s instructions and ensure secure mounting before operation. Start at a moderate speed to check contact and gradually increase to the recommended operating speed for the tool and disc. Apply light, even pressure and move the disc across the workpiece to avoid excessive heat build-up and ensure uniform material removal. Replace the disc when abrasive performance diminishes or the backing shows signs of damage.

Usage recommendations

Use appropriate personal protective equipment, including safety glasses, hearing protection and gloves. Select the correct disc diameter and grit grade for the task and avoid excessive pressure to prolong disc life and achieve a consistent finish. Allow the disc to cool between extended passes when working on large areas to prevent overheating and premature wear.