3M 7100104920 Flap Disc 4 Inch 40 Grit Right Angle

Product Description

The 3M 7100104920 is a Type 29 right-angle flap disc built on the Cubitron II 969F platform, designed for medium to high-pressure metal grinding, beveling, weld removal, and edge deburring. At 4 inches in diameter and 40 grit, it uses 3M Precision-Shaped Grain technology to deliver a fast, consistent cut rate across a wide range of ferrous and non-ferrous metals. A durable polyester backing supports aggressive unit pressures without breakdown. The disc is sold individually and weighs approximately 2.573 pounds per unit. Licensed trades and fabrication shops rely on this disc where both cut speed and surface finish matter.

This flap disc is suited for angle grinder applications in metal fabrication, structural steel work, pipe fitting, and weld finishing. The right-angle geometry positions the disc for aggressive material removal on flat and contoured surfaces. Individual flaps break down progressively, continuously exposing fresh abrasive mineral so cut rate stays consistent from the first pass to the last. It performs well in applications where a smooth finish after grinding reduces the need for secondary finishing steps.

Key Features

• 3M Precision-Shaped Grain provides exceptionally fast cut rate for beveling, weld removal, and edge deburring
• Polyester backing withstands high unit pressure without delaminating
• Progressive flap breakdown exposes fresh mineral continuously, maintaining consistent cut rate through the disc life
• Lower risk of gouging compared to fiber discs and bonded grinding wheels
• 4 inch diameter and 40 grit configuration suits aggressive stock removal followed by a smooth finish
• Versatile on a range of metals where surface finish quality is a priority

Compatibility

Designed for use on right-angle grinders accepting 4-inch diameter abrasive flap discs. Suitable for grinding, beveling, and weld removal on ferrous and non-ferrous metals.

Installation Notes

Mount on a right-angle grinder rated for the disc diameter and maximum RPM of the abrasive. Ensure the grinder guard is properly installed before operation. Confirm the arbor size matches the disc hub before mounting. Operators should wear appropriate PPE including eye protection and gloves when using abrasive discs.

Technical Specifications

• Diameter: 4 inches
• Grit: 40
• Disc Type: Right Angle (Type 29)
• Abrasive: 3M Precision-Shaped Grain
• Backing Material: Polyester
• Series: Cubitron II 969F
• Package Length: 7.13 inches
• Package Width: 4.75 inches
• Package Height: 5.13 inches
• Weight: 2.573 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 10

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100104920