Metal Polishing Stones – 7 Common Shapes and How to Choose Efficiently with Minimal Consumption

Today, machine-based metal polishing is gaining popularity. To perform polishing effectively, specialized equipment such as 3D vibratory finishing machines, grinders, shot blasting machines is required, along with consumable materials including polishing stones, stainless steel media, ceramic media, blasting sand, and shot balls.

Polishing stones are consumable materials used in vibratory finishing technology. So, how many types of metal polishing stones are there? What are their shapes, and how can you choose the most efficient stones with minimal wear? Let’s explore in this article.

1. Types of Metal Polishing Stones

1. Ceramic stones: Specially designed for coarse surface finishing, removing burrs and sharp edges. Mainly made of ceramic abrasive grains. Common grit sizes range from #60 to #600.
2. Plastic stones: Produced from stone powder and abrasive grains, with grit sizes mainly #150 to #600. Available in three polishing grades: coarse, medium, and fine.
3. Polishing stones: Includes ceramic stones and ceramic balls used for creating a glossy finish on products. Available in various grit sizes from #90 to #600.

2. 3 Common Shapes of Metal Polishing Stones and Their Suitable Applications

Metal polishing stones come in various distinctive shapes, each suitable for different product types.

2.1. Round Shape

Round stones are the most common type, available in both ceramic stones and ceramic balls of different sizes. This shape is versatile and can be applied to most types of products. However, round stones are particularly suitable for simple components with relatively flat surfaces and fewer burrs or sharp edges.

2.2. Isosceles Triangular, Oblique Triangular, Straight Rod, and Oblique Rod Shapes:

For products with multiple slots, grooves, or sharp edges, these shapes are the most suitable choice. Their angular design allows the stones to easily reach and polish deep, narrow areas, significantly improving the polishing efficiency. Both ceramic and ceramic polishing stones are available in these shapes.

2.3. Cone and Pyramid Shapes

These are distinctive shapes of plastic polishing stones. They are ideal for polishing soft metals such as copper and aluminum, where a high-quality surface finish is required. These stones are particularly effective when there is a strict requirement to avoid leaving scratches or marks on the surface.

All of the above types of metal polishing stones are well-suited for polishing stainless steel, metal molds, and various metal parts made from iron, copper, aluminum, zinc, and more.

3. How to Choose Metal Polishing Stones for High Efficiency and Minimal Consumption.

1. First, it is essential to have basic knowledge of different types of polishing stones and their properties in order to select the most suitable option for your product. Avoid testing multiple stones based solely on “trial and error,” as this leads to waste and inefficiency.
2. Second, choose reputable suppliers with clear origins and certification to avoid counterfeit or low-quality products. Inferior stones wear out quickly and, despite their lower price, result in higher overall consumption and cost.
3. Third, each product size and shape requires a specific stone size. For example, polishing brass door locks is best achieved using cone-shaped plastic stones with a 10 mm size. To achieve optimal results, it is advisable to seek guidance from experienced industry experts or long-established suppliers.

As a leading company with over 10 years of experience in metal surface finishing, LEKAR confidently provides customers with high-quality polishing consumables imported from trusted suppliers. We are ready to offer professional consultation and listen to customer needs to deliver the most effective solutions.

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