3M 7010363306 Flap Disc 40 Grit 4.5 Inch Type 29

Product Description

The 3M 7010363306 is a Type 29 flap disc engineered for medium-pressure grinding and surface preparation on flat and contoured workpieces. Built around 3M Precision-Shaped Grain abrasive technology, the disc delivers a fast cut rate and extended service life compared to conventional abrasive grain. At 4.5 inches in diameter and 40 grit, it removes material aggressively while leaving a surface ready for coating or further finishing. Fabricators, welders, and metalworking professionals use this disc on right-angle grinders for weld leveling, light deburring, and pre-paint surface prep on mild steel and stainless steel.

This flap disc is suited for medium-duty metalworking applications in fabrication shops, manufacturing environments, and field welding operations. It performs well on flat surfaces and contoured profiles alike, making it a practical choice for weld seam leveling and blending. The 40-grit designation targets aggressive stock removal while still allowing reasonable control over the finished surface. It is particularly effective on stainless steel where gouge resistance and surface finish quality are critical requirements before inspection or coating.

Key Features

• 3M Precision-Shaped Grain abrasive delivers fast cutting and extended disc life
• Type 29 conical flap design suits both flat and contoured surface grinding
• Poly-cotton backing provides controlled, even wear under medium unit pressure
• Individual flaps break down progressively, exposing fresh mineral for consistent cut rate throughout disc life
• Produces less gouging than fiber discs and bonded abrasive wheels
• Effective on mild steel and stainless steel for weld leveling and pre-paint surface preparation

Compatibility

Designed for use on right-angle grinders accepting 4.5-inch diameter Type 29 flap discs. Suitable for mild steel and stainless steel workpieces in medium-pressure grinding and surface preparation applications.

Installation Notes

Flap discs of this type are mounted and changed by qualified metalworking personnel or trained operators following tool manufacturer guidelines. Verify the grinder's maximum RPM rating meets or exceeds the disc's rated speed before mounting. Always inspect the disc for damage before use and confirm the backing plate and hardware are properly secured. Wear appropriate PPE including eye protection and gloves when operating angle grinders with abrasive discs.

Technical Specifications

• Diameter: 4.5 inches
• Grit: 40
• Disc Type: Type 29 (Right Angle)
• Abrasive Grain: 3M Precision-Shaped Grain
• Backing Material: Poly-cotton
• Package Weight: 5.366 pounds
• Package Length: 8.88 inches
• Package Width: 5.75 inches
• Package Height: 6.13 inches
• Unit of Measure: Each
• Minimum Order Quantity: 10
• UPC: 051141556449

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7010363306