Product Overview

High alumina ceramic polishing media are dense sintered abrasives manufactured with high-content alumina under high temperature. As universal medium finishing tumbling media for metal surface treatment, they feature moderate hardness and great toughness.

They integrate deburring, chamfering and surface refining functions. With mild cutting force, they leave uniform fine texture without scratching workpieces, preparing parts for subsequent mirror finishing.

Compact structure brings excellent chipping resistance and low powder loss to reduce overall consumption cost. Chemically inert to acid and alkali polishing compounds, they contain no metal impurities and will not cause dark discoloration on finished products.

A full range of shapes and sizes are offered with custom options, applicable for both wet and dry polishing. They perfectly match vibratory finishers, vortex polishing machines, rotary tumblers and centrifugal finishing equipment.

Key Advantages

1. Cost-effective universal media for mass medium finishing production
2. Balanced hardness efficiently removes burrs, flash and oxide layers without damaging precision parts
3. Dense sintered body delivers outstanding wear resistance and longer service life
4. Free of heavy metal precipitation, ensuring clean polishing results for high-standard products
5. Diverse shapes & sizes fit flat, curved, deep-hole and irregular workpieces
6. Compatible with dry & wet processing, all mainstream finishing machines

Basic Specifications

• Al₂O₃ Content: 75%–85%
• Mohs Hardness: 8.0
• Density: 2.6 g/cm³
• Chemical Resistance: Acid & alkali resistant
• Processing Mode: Wet polishing / Dry polishing

Common Shapes & Functions

1. Triangular media: Sharp edges for heavy deburring and chamfering on zinc alloy die castings & irregular hardware
2. Oblique cylinder media: Large contact area for uniform finishing on flat surfaces
3. Ball media: No sharp corners, ideal for thin-wall delicate parts
4. Ellipse / Rhombus media: Reach deep holes and narrow gaps of complex components

Application Scope

Medium finishing and brightening for zinc alloy, aluminum, brass, stainless steel hardware, luggage fittings, auto stamping parts, alloy jewelry, 3C electronic connectors and small medical components.