Diamond Pellets for optical glass lens

Diamond Pellets

Diamond pellets are one of the crucial tools in the glass industry used in grinding several popular optical products, including mirrors, lenses, and prisms. Several glass industries preferred using diamond pellets primarily because they are reliable, fast, and cost-effective. These pellets feature a very smooth grinding action. They can remarkably transform the rough surface of a work piece into a smooth surface rapidly, which is incredibly time-saving when it comes to polishing.

Important Features

• Consistent, high-quality performance– excellent cutting with abrasion resistance and no scratch
• Cost-effective and eco-friendly (less disturbance)
• Low-level subsurface damage and strong bond with an increased lifespan.
• High dimensional accuracy and smooth,  improved surface finishes
• Clean process and excellent results using water-soluble cutting liquid

Detailed Description

Several reasons are responsible for the largely use of diamond pellets in the optical/glass industry. In this industry, it is not unusual to see a new product with a rough surface or damaged layer due to the milling process. For optimal production, therefore, these pallets are needed to make the surface grinding of every product attractive and durable.

Diamond Pellet Types

The two main types of diamond pellet with unique usages and features include metal bond diamond pellets and resin bond diamond Pellets. Note that a bond is a material that helps hold the grain.

Metal Bond Diamond Pellets

After the milling process, metal bond diamond pellets are used to treat the new product. By comparison, a metal bond is stronger than a resin bond, making it preferable for the initial finishing that needs much grinding. The metal bond diamond pellets help remove the layer damage and every rough spot that remains after the milling process. The mixture of metal powder and filler leads to pellet diamond powders,  which undergo cold pressing and then sintering through hot pressing.

Main Features

• Offer perfect initial finishing
• Smooth and controlled grinding action
• Multipurpose and universal
• Efficient, durable, and stronger than resin bond diamond pellets.

Resin Bond Diamond Pellets

The resin bond diamond pellets are used to perform superfinishing after the first finishing stage. They help to effectively remove every leftover damaged layer, improve size and shape, and make the optical elements look shiny. The mixture of diamond powder and filler leads to pellet resin powder, which undergoes cold pressing and then sintering through hot pressing.

Main Features

• Inexpensive
• Time-saving and high performance
• Makes optical elements shiny
• Provide extra smoothness but not as strong as its metal counterpart

Diamond Pellets  and Their Shapes

Diamond grinding pellets come in different shapes. Each shape is made with respect to the purpose of use. The standard shapes of diamond pellets include triangle,  round, hexagon, and square.  Diamond finish or super finish columns are typically flat, flat-convex flat-concave, double convex,  double concave, etc. For chip removal, the number of slots for the end face processing includes two, four, six, and eight.

Diamond Pellets and Their Applications

Diamond Pellets are characterized by wide applications. They are used in different sectors, including civil, transportation, aerospace, military, and glass industry.  As an essential tool, they are heavily utilized in the sphere and spherical grinding of ceramics, optical glass, gemstones, glassware, lenses, and several hard, brittle materials (non-metallic). Moreover, a diamond pellet is designed to offer several benefits, including extended work-life, incredible surface quality, high efficiency,  strong abrasive holding force, high machining precision, excellent shape retention, and high-level of wear resistance.

Diamond Pellets and Their Peculiar Specifications

Product	Diameter	Thickness	Grit	Concentration
Metal bond Finishing, Grinding pellets	3-20mm	2.5-10	180-2000	75%-150%
Exceed Finish Grinding Pellets, Resin Bond	3-20mm	2.5-10	800-3000	75%-150%
Polishing Pellets (Resin)	3-20mm	2.5-10		75%-150%

 

Diamond Abrasive: Benefits for Making Grinding Pellets

The following are some impressive benefits that make diamond abrasive a preferable option in the glass industry:

1. It features proper hardness: Graphite, coal, and diamonds have the same chemical elements. Graphite and coal feature carbon atoms organized in sheets, which gives them a velvety feel. As crystalline carbon, diamond contains carbon atoms that are arranged in a tetrahedron. For a 3-dimensional space, every carbon atom is joined to the other five carbon atoms. Graphite and coal have carbon sheets that are not as strong as this. The hardness of diamond pellets is due to the chemical structure, which can cut through any substance without excluding other diamonds.
2. It is durable: The bonds (Resin and metal) in both types of diamond pellets are ideal because they don’t wear away easily. They go through a gradual process, making the fresh layer of the diamond to do the polishing of the concrete. This explains why it’s the bond that makes the tool durable and not the diamond, which wears away from the tool eventually. Due to the hardness of the diamond tools, therefore, they have a longer work life when compared to other abrasives, which makes diamond pellets a good option.
3. It features speed cutting: Since diamond abrasives are characterized by impressive hardness, they can help grind quicker than other abrasives. Diamond pellet tools can easily grind through a hard stone with fast speed instead of grinding repeatedly.
4. It is cost-effective: Diamond pellets are not as expensive as other abrasives, despite their unique characteristics. Also, with diamond abrasives, users can do more work with fewer tool changes due to their endurance.

Final Note

Diamond pellets are ideal tools that effectively help grind, finish, and polish new products in the optical industry. Industries such as ceramic, glass, etc., demand more for diamonds and prefer them used as an abrasive material because of their strength.

Diamond pellets come in two different types: metal bond and resin bond. Metal bonds for initial finishing and resin bonds for super finishing. They also have different shapes from which you can choose according to what your work requires. For the specifications, you can check the body of the content for the most suitable tool for your work.

More customized Diamond Tools are available, contact us.

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