3M 7100104604 Flap Disc 4.5 Inch 40 Grit Type 29

Product Description

The 3M 7100104604 is a Type 29 conical flap disc designed for aggressive material removal on metal surfaces. Built with 3M Precision-Shaped Grain bonded to a durable polyester backing, this 4.5-inch, 40-grit disc delivers a fast, consistent cut throughout its full service life. As individual flaps wear, they break down progressively to expose fresh abrasive mineral, maintaining cut rate from first use to last. It is suited for medium to high unit pressure applications where both cutting speed and surface finish quality matter. Licensed trades workers and fabricators reach for this disc when production grinding demands do not allow for slow or inconsistent abrasive performance.

This flap disc is used in metal fabrication shops, structural steel work, pipe fitting, and general weld finishing environments. It performs well on carbon steel, stainless steel, and other ferrous metals. Common applications include beveling plate edges before welding, removing weld beads, and deburring cut edges. The Type 29 conical profile increases surface contact on flat work and is compatible with standard right-angle grinders. The lower risk of gouging compared to fiber discs and bonded wheels makes it a practical choice where surface finish is part of the acceptance criteria.

Key Features

• 3M Precision-Shaped Grain delivers a fast, aggressive cut on metal surfaces
• Progressive flap breakdown exposes fresh mineral continuously for a consistent cut rate throughout disc life
• Durable polyester backing withstands medium to high unit pressure grinding applications
• Type 29 conical profile maximizes surface contact on flat work
• Lower gouging risk compared to fiber discs and bonded abrasive wheels
• Suitable for applications where finish quality is a requirement alongside material removal

Compatibility

Designed for use with standard right-angle grinders accepting 4.5-inch Type 29 flap discs. Suitable for grinding, beveling, weld removal, and deburring on carbon steel, stainless steel, and other ferrous metals.

Installation Notes

This disc is installed and operated by metalworkers, fabricators, and pipefitters using right-angle grinders. Verify the grinder's maximum RPM rating meets or exceeds the disc's rated speed before mounting. Inspect the disc for damage before each use and discard any disc that shows signs of delamination or cracking. Always use appropriate eye, face, and hand protection when operating angle grinders with abrasive discs.

Technical Specifications

• Disc Diameter: 4.5 inches
• Grit: 40
• Disc Type: Type 29 (Right Angle, Conical)
• Abrasive Grain: 3M Precision-Shaped Grain
• Backing Material: Polyester
• Application: Beveling, Weld Removal, Edge Deburring, Grinding
• Unit of Measure: Each
• Minimum Order Quantity: 10
• UPC: 076308644159

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100104604