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3M™ Paper Sheet 346U

3M Product Number 346U
11Products
  • Tough aluminum oxide abrasive cuts fast and performs well on many surfaces
  • Load resistant open-coat feature enables longer use before replacement
  • Strong, D-weight paper backing supports aggressive sanding
  • Sheets are conformable to various workpieces and usable by either hand or machine
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Width
Length
Grade
11 Products Available
Available options: Width, Length and Grade
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Specifications
Attribute Name
Value
Applications
Finishing
Backing Material
Paper
Backing Weight
D Weight
Brand
3M™
Coat Type
Open Coat
Color
Gold
Converted Form
Sheet
Equipment - Machines
Hand Sanding
Grade
36, 40, 50, 60, 80
Industries
Composite, Marine, Metalworking, MRO, Paint Preparation, Woodworking
Length
11 Inch, 17.5 Inch, 8 Inch, 9 Inch
Length (Metric)
203.2 mm, 228.6 mm, 279.4 mm, 444.5 mm
Mineral Type
Aluminum Oxide
Position
Best
Product Form
Sheet
Sub Industries
Cabinetry, Custom Woodworking and Millwork, Furniture, Metal Fabrication, Primary Wood and Panel Processing
Width
2.75 Inch, 3 Inch, 3.66 Inch, 9 Inch
Width (Metric)
228.6 mm, 69.85 mm, 76.2 mm, 92.964 mm
Product Details
  • Tough aluminum oxide abrasive cuts fast and performs well on many surfaces
  • Load resistant open-coat feature enables longer use before replacement
  • Strong, D-weight paper backing supports aggressive sanding
  • Sheets are conformable to various workpieces and usable by either hand or machine
  • Sheets come in a number of sizes to accommodate various applications

3M™ Paper Sheet 346U is constructed of aluminum oxide and comes in a range of grades and sizes to accommodate many different projects. The paper backing is durable for coarse sanding, yet flexible enough to be used on curved surfaces. Its cut-rate and durability make this an excellent choice for blending the joints of connecting pieces in wood- and metal-working.

Aluminum oxide is a very hard mineral that maintains sharp points on the grains much longer than natural abrasives such as emery or garnet. The abrasive grains are adhered to the sandpaper with some space between them, known as open-coat construction, to minimize the buildup of dust on the surface of the paper, which would otherwise load the abrasive points. Loading often results from sanding soft materials and can clog the abrasive, shortening the usable life of the sandpaper sheet.

Learn more about 3M™ Industrial Products for Metalworking (PDF, 13 Mb)

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