3M 7100180139 Flap Disc 40 Grit 4.5 Inch Type 27 13300 Rpm

Product Description

The 3M 7100180139 is a Type 27 coated flap disc designed for aggressive material removal on carbon steel, stainless steel, and other heat-sensitive alloys. Built around 3M Precision-Shaped Grain, the disc cuts faster and outlasts conventional aluminum oxide and alumina zirconia flap discs. The 4.5-inch diameter disc runs at a maximum of 13300 RPM and carries a 40-grit rating, making it well-suited for heavy stock removal, weld grinding, and beveling. Individual flaps wear away progressively, continuously exposing fresh abrasive mineral so cut rate stays consistent from the first pass to the last.

This disc is used across fabrication shops, maintenance facilities, and job sites where versatile surface work is required. Common applications include weld grinding, weld beveling, and surface preparation on carbon steel and stainless steel workpieces. The Type 27 depressed-center profile keeps the grinding angle low and controlled, which is particularly useful when working in tight areas or on flat stock. The 40-grit cut level handles initial passes on rough welds and heavy scale before transitioning to finish work.

Key Features

• 3M Precision-Shaped Grain cuts faster and lasts longer than conventional aluminum oxide and alumina zirconia abrasive grain
• Progressive flap breakdown exposes fresh mineral continuously, maintaining consistent cut rate throughout disc life
• 40 grit rating suited for weld grinding, beveling, and aggressive surface preparation
• Type 27 depressed-center profile for low-angle grinding on flat and contoured surfaces
• Rated to 13300 RPM for use with standard 4.5-inch angle grinders
• Compatible with carbon steel, stainless steel, and other heat-sensitive alloys

Compatibility

Designed for use with 4.5-inch angle grinders rated at or above 13300 RPM. Suitable for grinding and surface preparation on carbon steel, stainless steel, and heat-sensitive alloy workpieces.

Installation Notes

Installation and disc changes must be performed by qualified personnel following the grinder manufacturer's instructions and applicable ANSI B11 and OSHA abrasive wheel safety standards. Always power down and unplug or lock out the grinder before mounting or removing the disc. Verify that the grinder's rated RPM meets or exceeds the disc's maximum RPM rating before use. Inspect the disc for damage before each use and never operate a cracked or delaminated flap disc.

Technical Specifications

• Disc Diameter: 4.5 inches
• Grit: 40
• Disc Type: Type 27 (T27)
• Maximum Speed: 13300 RPM
• Abrasive Type: Coated Flap Disc with Precision-Shaped Grain
• Package Length: 8.4 inches
• Package Width: 5.2 inches
• Package Height: 5.6 inches
• Weight: 3.603 pounds
• UPC: 638060298836

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7100180139