Alumina Abrasive Cloth

Product Overview

Alumina abrasive cloth is a coated abrasive with a cloth backing and alumina grains. Alumina combines high hardness, toughness and good self-sharpening and is one of the most widely used abrasives. Available as sheets, rolls, belts and flap wheels, the product suits manual sanding and various machines in metalworking, woodworking, automotive manufacturing, shipbuilding, electronics and jewelry.

Product Parameters

Core Performance Advantages

1. High hardness and toughness for efficient grinding

Alumina abrasives combine hardness and toughness for strong metal-cutting action, high grinding efficiency and long life. A resin adhesive and advanced grain-coating process orient the grains for sharpness, durability and a good surface finish.

2. Good self-sharpening for sustained sharpness

Dulled alumina grains undergo microfracture to expose fresh cutting edges, maintaining cutting action and extending abrasive cloth life with fewer replacements.

3. Flexible cloth backing for complex profiles

The flexible, high-tensile-strength cloth backing conforms closely to flat, curved and contoured workpieces. Some products are waterproofed for wet and dry use and resist curling.

4. Moisture and loading resistance for durability

Moisture-resistant treatment and shape-setting processes help prevent moisture-induced deformation. An anti-loading coating reduces swarf adhesion and extends abrasive cloth life.

5. A full grit range for all finishing stages

Grits from 40# to 600# cover rough grinding and heavy stock removal, intermediate surface finishing and fine polishing.

Typical Applications

1. Metalworking

Weld grinding, deburring, rust and scale removal on carbon steel, stainless steel, aluminum alloys and cast iron

2. Woodworking

Sanding and polishing wood surfaces and preparing primer coats

3. Automotive Manufacturing and Repairs

Sheet-metal grinding, surface preparation, weld-spot cleaning and paint finishing

4. Shipbuilding

Grinding hull steelwork, stripping old finishes and preparing surfaces

5. Electronics and Jewelry

Precision grinding of electronic components and fine polishing of jewelry

6. General Maintenance

Grinding and polishing ceramics, glass, plastics, leather, semiconductors and other non-metallic materials

Product Specifications

Applicable Materials

Metals: carbon steel, stainless steel, alloy steel, cast iron, aluminum alloys, copper and copper alloys

Non-metals: wood, plastics, ceramics, glass, semiconductors and leather

Coated surfaces: paint, primer and adhesive surfaces

Selection Guide

Choose the product form: sheets for hand sanding, belts for machines, rolls for continuous work or flap wheels for complex profiles.

Choose grit size for the application:

Coarse (40#-80#): heavy stock removal, initial weld grinding, rust removal and rough polishing

Medium (100#-180#): general grinding, surface finishing and weld-mark cleaning

Fine (240#-400#): fine polishing and surface finishing

Extra-fine (600# and finer): mirror polishing and precision surface finishing

Choose the operating method:

Dry type: for wood, plastics and materials unsuitable for water

Wet / dry type: for metals and applications requiring cooling; water reduces dust and loading

Safe Use Instructions

Check the abrasive cloth for damage, moisture or deterioration before use. Do not use damaged material.

For machine grinding, check the operating speed, fit the guard and secure the abrasive cloth correctly.

Wear protective goggles, a dust mask and protective gloves to protect against dust inhalation and flying debris.

Use even, moderate pressure to prevent cloth tearing or workpiece overheating.

During wet grinding, keep the abrasive cloth wet to prevent overheating and loading.

Storage

Store in a cool, dry, ventilated place away from moisture and high temperatures.

Avoid direct sunlight to prevent adhesive aging.

Store sheets flat and avoid heavy pressure that could cause deformation.

Hang rolls or store them upright to prevent moisture-induced deformation.