3M 7100104890 Flap Disc 7 Inch 80 Grit Right Angle

Product Description

The 3M 7100104890 is a Type 29 right-angle flap disc engineered for medium to high-pressure metal grinding tasks. Built around 3M Precision-Shaped Grain bonded to a durable polyester backing, the disc delivers a fast, consistent cut rate throughout its full service life. Individual flaps break down progressively, exposing fresh abrasive mineral as the disc wears, which sustains cutting performance without the need to change pressure or technique. At 7 inches in diameter and 80 grit, this disc handles aggressive stock removal while still leaving a finish smooth enough for applications where surface quality matters.

This flap disc is suited for fabrication shops, structural steel work, pipe fitting, and maintenance grinding where tasks such as beveling, weld removal, and edge deburring are routine. The right-angle geometry fits standard 7-inch right-angle grinders commonly used in industrial and construction environments. The polyester backing is built to withstand the high unit pressures associated with heavy weld removal and edge work on carbon steel, stainless steel, and other metals. The design reduces the risk of gouging compared to fiber discs and bonded abrasive wheels, making it a practical choice when workpiece surface condition is a concern.

Key Features

• 3M Precision-Shaped Grain provides a fast, aggressive cut rate on a range of metal substrates
• Progressive flap breakdown continuously exposes fresh mineral, maintaining consistent cut throughout disc life
• Durable polyester backing resists deformation under high unit pressure applications
• Right-angle Type 29 configuration fits standard 7-inch angle grinders
• Lower gouging risk compared to fiber discs and bonded wheels
• 80 grit balances aggressive material removal with an acceptable finish quality

Compatibility

Designed for use on standard 7-inch right-angle grinders; suitable for grinding carbon steel, stainless steel, and other metals in fabrication and maintenance applications.

Installation Notes

Mounting and disc changes must be performed with the grinder unplugged or the power source locked out. Verify the grinder spindle speed rating meets or exceeds the maximum rated RPM marked on the disc before use. Wear appropriate PPE including a face shield and gloves when mounting or operating abrasive discs. Inspect the disc for damage before each use and discard any disc that shows cracking, fraying, or delamination.

Technical Specifications

• Diameter: 7 inches
• Grit: 80
• Disc Type: Right Angle Flap (Type 29)
• Abrasive Grain: 3M Precision-Shaped Grain
• Backing Material: Polyester
• Package Weight: 2.715 pounds
• Package Dimensions: 7.7 x 7.7 x 6.2 inches
• Sold As: Each
• Minimum Order Quantity: 5
• UPC: 076308643848

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100104890