3M 7100380307 Flap Disc 4.5 in 60 Grit Type 27 Quick Change

Product Description

The 3M 7100380307 is a Type 27 flat-profile flap disc designed for aggressive material removal and blending on metal surfaces. Built around 3M Cubitron 3 abrasive technology, it uses precisely shaped ceramic grain that continually fractures to expose fresh cutting edges, maintaining cut rate across the life of the disc. At 4.5 inches in diameter with a 5/8 inch-11 threaded hub, it mounts directly to standard angle grinders. The 60 grit designation targets heavy stock removal, weld grinding, and surface prep on ferrous and non-ferrous metals. Each case contains 10 discs.

This disc is suited for fabrication shops, structural steel work, pipeline prep, and general metal finishing in both residential and commercial applications. The Type 27 flat profile keeps the disc surface parallel to the workpiece, making it the standard choice for flat and contoured surface work. The Quick Change hub design simplifies disc swaps on compatible angle grinders, reducing downtime during high-volume grinding tasks. Licensed welders, ironworkers, pipefitters, and metal fabricators are the primary installers and users of this consumable.

Key Features

• Cubitron 3 ceramic abrasive grain for sustained cut rate and long disc life
• Type 27 flat profile for flush surface grinding and blending
• 60 grit for aggressive stock removal and weld grinding
• 5/8 inch-11 threaded hub fits standard angle grinders
• Quick Change mount reduces disc swap time
• 10 discs per case for job-site and shop stocking efficiency

Compatibility

Designed for use with standard angle grinders fitted with a 5/8 inch-11 threaded spindle and rated for Type 27 flap discs at the appropriate RPM for a 4.5 inch disc diameter.

Installation Notes

Mounting and disc changes must be performed with the grinder powered off and unplugged or battery removed. Confirm the grinder spindle speed rating meets or exceeds the maximum RPM marked on the disc before operation. Inspect the disc for damage before each use and discard any disc that shows delamination, torn flaps, or hub cracks. Always wear appropriate eye and face protection, and ensure workpiece is secured before grinding.

Technical Specifications

• Disc Diameter: 4.5 inches
• Arbor Size: 5/8 inch-11 threaded hub
• Grit: 60
• Disc Type: Type 27 Flat
• Mount Style: Quick Change
• Quantity per Case: 10

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100380307