Abrasive flap disc KLINGSPOR SMT325 EXTRA 125 mm grit 40 (MPN 321660)

The KLINGSPOR SMT325 EXTRA 125 mm grit 40 abrasive flap disc is designed for efficient material removal and controlled surface finishing when mounted on an angle grinder. Its raised (convex) flap configuration maintains consistent contact with the workpiece, enabling uniform stock removal across contoured and flat surfaces. The disc is intended for metalworking tasks such as deburring, weld seam blending, rust and paint removal, and shaping of hard materials.

Advantages

The convex flap design provides improved contouring and extended flap life compared with flat discs. Coated abrasives on overlapping flaps deliver consistent cutting performance and heat dissipation to reduce glazing. The 125 mm diameter and grit 40 abrasive offer a balance between aggressive stock removal and manageable surface finish, helping to speed up prep and fabrication work while maintaining control during grinding.

Suitable for

• Deburring sharp edges on steel and stainless steel
• Blending and smoothing weld seams
• Removing rust, scale and old paint from metal surfaces
• Shaping and profiling metal parts and contours

Key specifications

• Disc diameter: 125 mm
• Abrasive grit: 40 (coarse for material removal)
• Raised/convex flap construction for contour work
• Compatible with angle grinders that accept 125 mm discs
• Designed for use on metal and other hard materials

How to use

Securely mount the flap disc to an angle grinder that supports 125 mm accessories, following the tool and disc manufacturer’s instructions. Use appropriate rotation speed as specified by the grinder and maintain a steady, controlled motion across the workpiece. Apply moderate pressure—allow the abrasive flaps to do the cutting rather than forcing the disc. Regularly inspect the disc for wear and replace it when flaps are worn or the backing is exposed.

Usage recommendations

Use personal protective equipment including eye protection, hearing protection, gloves and respiratory protection when grinding. Start on a test area to confirm the desired removal rate and finish. For stainless steel, use suitable coolant or low-pressure techniques if overheating or discoloration is a concern. Store discs in a dry environment away from direct sunlight and extreme temperatures to preserve abrasive performance.