Flap Disc 115 mm Grain 40 Flat, Expert+ (pack of 10)

Flap Disc 115 mm Grain 40 Flat from Expert+ is a 115 mm abrasive disc designed for use with standard angle grinders. With coarse grit 40 and a flat flap profile, this pack of 10 discs is intended for aggressive material removal, deburring and initial surface preparation on steel and similar metals. The construction balances cutting performance and life, making it suitable for smoothing welds, reducing sharp edges and preparing metal before finishing.

Advantages

The coarse 40-grit abrasive provides rapid stock removal while maintaining a relatively consistent surface finish across the workpiece. The flat flap layout ensures even contact on flat and slightly contoured surfaces, reducing gouging and enabling controlled grinding. Supplied as a pack of 10, the discs offer convenient replacement frequency for professional and DIY use. The design fits standard 115 mm backing pads, allowing easy mounting on common angle grinders.

Suitable for

• Removing weld beads and smoothing weld seams on steel
• Deburring cut metal edges and trimming excess material
• Surface preparation before priming, painting or coating
• Shaping and leveling metal parts with moderate contour

Key specifications

• Diameter: 115 mm
• Grit size: 40 (coarse)
• Profile: flat
• Pack quantity: 10 discs
• Compatible with 115 mm angle grinder backing pads
• Intended materials: steel and similar ferrous metals

How to use

Mount the flap disc on a compatible 115 mm backing pad and secure according to the grinder manufacturer's instructions. Start grinding at low to moderate speed to establish a controlled cut, then apply steady, even pressure while moving across the work surface to avoid overheating and gouging. Allow the abrasive to do the work—excessive force reduces disc life and may damage the workpiece. Replace discs when the abrasive flaps are excessively worn or the cutting performance declines.

Usage recommendations

For best results, use appropriate personal protective equipment including eye protection, gloves and hearing protection. Match disc speed rating to your angle grinder's rpm and avoid side-loading beyond the disc's intended application. For final surface finish, follow with finer grit flap discs or finishing operations as required.