3M 7010363303 Flap Disc 80 Grit 4.5 Inch Type 27

Product Description

The 3M 7010363303 is a Type 27 flap disc designed for medium-pressure grinding and surface preparation on flat and contoured workpieces. At 4.5 inches in diameter and 80 grit, it fits standard right-angle grinders and delivers aggressive material removal without the gouging typical of fiber discs or bonded abrasive wheels. The disc is built with 3M Precision-Shaped Grain, an engineered abrasive that cuts fast and maintains a consistent cut rate as the disc wears. A poly-cotton backing controls wear evenly under medium unit pressure, making this disc well-suited for fabricators and metalworkers who need reliable performance through a full disc life.

This flap disc is used in light deburring, weld leveling, and surface prep ahead of painting or coating on mild steel. It also performs well on stainless steel fabrication work where finish quality and gouge resistance matter. The Type 27 flat profile suits flat surfaces and shallow contours. Typical users include welders, metal fabricators, and maintenance technicians working on structural steel, sheet metal, or pipe. Minimum order quantity is 10 discs per unit.

Key Features

• 3M Precision-Shaped Grain delivers fast cut and extended disc life compared to conventional abrasive grain
• Individual flaps break down progressively, exposing fresh mineral and maintaining a consistent cut rate
• Poly-cotton backing provides controlled, even wear under medium unit pressure
• Type 27 flat profile suits flat surfaces and gently contoured workpieces
• Less gouging than fiber discs and bonded wheels, reducing rework on finish-sensitive surfaces
• Effective on both mild steel and stainless steel applications

Compatibility

Designed for use with standard right-angle grinders accepting 4.5-inch Type 27 flap discs.

Installation Notes

This disc is installed and replaced by the operator of the grinder — no licensed trade certification is required, but always follow the grinder manufacturer's maximum RPM rating and confirm the disc's rated speed meets or exceeds the tool's no-load RPM before mounting. Inspect the disc for damage before each use and discard any disc showing torn flaps, hub damage, or delamination. Wear appropriate PPE including a face shield, gloves, and hearing protection during operation.

Technical Specifications

• Diameter: 4.5 inches
• Grit: 80
• Disc Type: Type 27 (T27)
• Orientation: Right Angle
• Abrasive Grain: 3M Precision-Shaped Grain
• Backing Material: Poly-cotton
• Unit of Measure: Each
• Minimum Order Quantity: 10
• Package Weight: 2.85 pounds
• Package Length: 8.88 inches
• Package Width: 5.75 inches
• Package Height: 6.13 inches
• UPC: 051141556371

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010363303