3M 7100178088 Flap Disc 769F 5 Inch 120 Grit Type 27

Product Description

The 3M 7100178088 is a Type 27 coated flap disc engineered for aggressive material removal and surface preparation on metal. Built around 3M Precision-Shaped Grain, the disc cuts faster and outlasts conventional aluminum oxide and alumina zirconia flap discs. At 5 inches in diameter with a 120-grit abrasive surface, it runs at a maximum speed of 12000 RPM. As individual flaps wear down, fresh mineral is continuously exposed, maintaining a consistent cut rate throughout the disc life. Licensed tradespeople and fabricators handling weld grinding, beveling, and surface prep will find this disc well-suited to daily production demands.

This disc is designed for use on carbon steel, stainless steel, and other heat-sensitive alloys. Its Type 27 flat profile makes it appropriate for flat stock work, weld blending, and edge beveling in both shop and field environments. The 5-inch diameter fits standard right-angle grinders common in fabrication shops, structural steel work, and metal finishing applications. The 120-grit rating positions it for intermediate stock removal and surface conditioning rather than coarse hogging or fine finishing.

Key Features

• 3M Precision-Shaped Grain delivers faster cut rates and longer disc life compared to conventional aluminum oxide and alumina zirconia grain
• Individual flaps progressively expose fresh abrasive mineral, sustaining consistent cut rate across the full disc life
• Type 27 flat profile suits weld grinding, beveling, and flat surface preparation
• Rated for use on carbon steel, stainless steel, and heat-sensitive alloys
• 5 inch diameter and 120 grit cover a broad range of intermediate metalworking tasks
• 12000 RPM maximum speed rating compatible with standard right-angle grinder operation

Compatibility

Designed for use on right-angle grinders accepting 5-inch Type 27 flap discs. Suitable for carbon steel, stainless steel, and heat-sensitive alloy workpieces across weld grinding, beveling, and surface prep applications.

Installation Notes

Mounting should be performed by a qualified operator following the grinder and disc manufacturer guidelines. Verify the grinder free-speed RPM does not exceed the 12000 RPM disc rating before use. Inspect the disc for damage before each use and never operate a cracked or torn flap disc. Appropriate PPE including eye protection and gloves is required during installation and operation.

Technical Specifications

• Disc Diameter: 5 inches
• Grit: 120
• Disc Type: Type 27 (T27)
• Maximum Speed: 12000 RPM
• Abrasive Grain: 3M Precision-Shaped Grain
• Package Dimensions: 9.88 x 5.75 x 6.13 inches
• Weight: 2.336 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 10
• UPC: 638060059284

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100178088