Pferd 67646 Radial Flap Disc 40 Grit Aluminum Oxide

Product Description

The PFERD 67646 is a radial flap disc designed for grinding and finishing on stainless steel, soft metals, carbon steel, aluminum, and brass. Built with coated aluminum oxide abrasive on a high-density fiberglass backing, the disc measures 4-1/2 inches in diameter with a 7/8-inch arbor hole. The 40-grit abrasive provides aggressive stock removal while a built-in grinding aid controls heat buildup and reduces loading, extending disc life during heavy use. This disc is suited for angle grinder work in fabrication, maintenance, and metal finishing applications.

This flap disc is used in general-purpose metal grinding and blending operations across residential, commercial, and industrial settings. It is well suited for angle grinder use on stainless steel components where heat management is critical, as well as on softer metals like aluminum and brass. Fabricators, ironworkers, and maintenance technicians commonly reach for this disc when rapid material removal and surface conditioning are needed in a single tool.

Key Features

• Coated aluminum oxide abrasive — sharp, durable, and heat-resistant at high speeds
• 40-grit configuration for aggressive stock removal on ferrous and non-ferrous metals
• Grinding aid reduces heat and loading, extending abrasive service life
• High-density flap layout increases contact and provides consistent cut rate
• Fiberglass backing plate for structural support and stability under load
• 7/8-inch arbor fits standard angle grinders without an adapter

Compatibility

Designed for use on standard 4-1/2-inch angle grinders with a 7/8-inch arbor. Suitable for grinding and finishing on stainless steel, carbon steel, aluminum, brass, and other soft metals.

Installation Notes

Installation is performed by grinding equipment operators following standard angle grinder safety procedures. Ensure the grinder is unplugged or the power source is isolated before mounting or removing the disc. Verify the grinder's rated RPM meets or exceeds the disc's maximum operating speed before use. Always use the appropriate guard and personal protective equipment when operating abrasive flap discs.

Technical Specifications

• Disc Type: Radial Flap Disc
• Diameter: 4-1/2 inches
• Arbor Size: 7/8 inches
• Abrasive Material: Aluminum Oxide
• Grit: 40
• Density: High Density
• Backing Material: Fiberglass
• Shipping Weight: 2 pounds

Standard Information

• Brand: PFERD
• Manufacturer Part Number: 67646