Diamond Flap Disc

Product Overview

Diamond flap discs are high-performance coated abrasives for precision grinding of hard, brittle materials. Diamond grains are electroplated or brazed onto steel flaps, which are arranged radially and bonded to a backing plate for use on angle grinders.

Diamond's exceptional hardness and wear resistance provide strong grinding performance, long service life and good value when processing hard, brittle materials. Common sizes are 100 mm (4″) and 125 mm (5″), compatible with common angle grinders.

Key Product Parameters

Core Performance Advantages

1. Powerful grinding performance

Diamond, the hardest natural material, handles cemented carbide, ceramics, glass, quartz and stone that are difficult to machine with conventional abrasives. Electroplating or brazing secures the diamond grains with high protrusion and sharp cutting edges.

2. Long service life

Diamond abrasives offer excellent wear resistance. As the surface diamonds wear, fresh diamonds beneath are exposed to form a continuous grinding layer, providing a much longer service life than conventional alumina or silicon carbide flap discs.

3. Secure flaps for improved safety

The metal substrate is securely bonded to the backing plate. Reinforced flap construction helps prevent flap ejection during high-speed rotation.

4. Excellent heat dissipation

Metal flap substrates and the high thermal conductivity of diamond dissipate heat effectively, lowering grinding-zone temperature and helping prevent thermal damage to the workpiece.

5. Versatile wet and dry use

The product supports both dry grinding and wet grinding with water to suit different working environments and materials.

6. High grinding quality

Low diamond-grain shedding helps prevent scratches caused by loose abrasive particles, making the disc suitable for precision work requiring high surface quality.

Typical Applications

Application areas and specific uses

Glass processing: edge grinding and chamfering of automotive windshields, curved architectural tempered glass, glass for steel furniture, doors and windows, and electronic glass

Stone processing: edge grinding, chamfering and surface preparation of marble, granite, engineered stone, tiles and ceramics

Cemented carbide: grinding and finishing complex 3D carbide components

Metalworking: surface grinding titanium alloys, stainless steel, high-temperature alloys and other difficult materials

Concrete: surface grinding and leveling

Applicable Materials

Natural stone: marble and granite

Engineered stone: quartz stone and artificial stone

Ceramics: ceramic tiles, porcelain tiles and stoneware

Glass: float glass, tempered glass and electronic glass

Cemented carbide: various hard-metal materials

Concrete: cement-based materials

Not suitable for soft materials such as wood and plastic

Grit Selection Guide

Coarse (60#-120#): rough grinding, leveling, chamfering and rapid stock removal

Medium (200#): intermediate grinding, pre-finishing and surface dressing

Fine (400# and finer): fine polishing and surface finishing for a smooth, uniform surface

For superhard alloys or engineered glass, start with a coarse grit and gradually progress to finer grits for the best surface finish.

Product Specification Summary

Size (in) / Size (mm) / Available grits / Flap count / Maximum speed (RPM)

4″ × 5/8″ / 100 × 16 / 60# / 120# / 200# / 400# / 62 flaps / —

4.5″ × 7/8″ / 115 × 22 / 60# / 120# / 200# / 400# / 62 flaps / 13,300

4.5″ × M14 / 115 × M14 / 60# / 120# / 200# / 400# / 62 or 100 flaps / 12,200

5″ × 7/8″ 125 × 22 60# / 120# / 200# / 400# — —

Safe Use Instructions

Ensure the product's maximum rated speed is at least equal to the angle grinder speed and mount it correctly.

Wear personal protective equipment, including protective goggles, a face shield, earplugs and a dust mask.

Diamond flap discs are for hard, brittle materials. Do not use them on soft materials such as wood or plastic.

Do not remove the angle grinder guard.

Storage

Store in a cool, dry place away from moisture.

Avoid direct sunlight to prevent adhesive aging.

Store flat and avoid heavy pressure that could cause deformation.