3M 7100178090 Flap Disc 769F 120 Grit 7 Inch Type 27

Product Description

The 3M 7100178090 is a coated abrasive flap disc in the 769F series, designed for grinding, blending, beveling, and surface preparation on metal. Built with 3M Precision-Shaped Grain, this Type 27 disc cuts faster and lasts longer than conventional aluminum oxide and alumina zirconia flap discs. At 7 inches in diameter with a 120 grit rating and a maximum speed of 8,600 RPM, it suits a wide range of metal fabrication and finishing tasks. Fabricators, welders, and metalworkers will find it effective across production and maintenance work.

This disc is designed for use on carbon steel, stainless steel, and other heat-sensitive alloys. Its Type 27 flat profile makes it well suited for flat surface grinding and weld blending. The individual flap construction exposes fresh abrasive mineral as the disc wears, maintaining a consistent cut rate throughout the life of the disc. Typical applications include weld grinding, beveling, and general surface prep in light industrial, fabrication shop, and field service environments.

Key Features

• 3M Precision-Shaped Grain cuts faster and outlasts conventional aluminum oxide and alumina zirconia abrasives
• Individual flaps break down progressively to expose fresh mineral and maintain consistent cut rate
• Suitable for carbon steel, stainless steel, and other heat-sensitive alloys
• Type 27 flat profile supports flat surface grinding, weld blending, and beveling
• 120 grit provides a balance of material removal and surface finish for finishing and prep work
• Rated to 8,600 RPM for use with standard right-angle grinders

Compatibility

Designed as an OEM-style replacement or standard-fit disc for 7-inch right-angle grinders accepting Type 27 flap discs.

Installation Notes

Installation should be performed by a qualified metalworker or fabricator familiar with angle grinder safety practices. Verify that the grinder spindle speed does not exceed the 8,600 RPM rating marked on the disc before mounting. Power down and disconnect the grinder from its power source before mounting or removing the disc. Ensure the disc is properly seated and the retaining nut is secured before resuming operation, and always use appropriate PPE including eye and face protection.

Technical Specifications

• Disc Diameter: 7 inches
• Grit: 120
• Disc Type: T27 (Type 27)
• Maximum Speed: 8,600 RPM
• Abrasive Grain: 3M Precision-Shaped Grain
• Package Dimensions: 7.7 x 7.7 x 6.2 inches
• Weight: 2.203 pounds
• Unit of Measure: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100178090