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What Is Rubber as a Grinding Stone Material?
Features, Structure, and Applications of Elastic Grinding Stones
When people hear the word "grinding stone", many imagine a hard stone or ceramic abrasive. However, industrial grinding stones also include Rubber Grinding Stones (elastic grinding stones), which use rubber as the bonding material.
Rubber Grinding Stones are used in a wide range of machining processes, including grinding, polishing, fine deburring, and final finishing of metal components. They are often utilized in applications where conformity to the workpiece surface and a stable surface finish are required.
This article explains why rubber is used in grinding stones, how Rubber Grinding Stones work, how they differ from conventional grinding stones, and the key points for selecting the right tool for your application.
What Is Rubber in a Grinding Stone?
In a grinding stone, rubber functions as the bonding material that holds the abrasive grains in place.
A grinding stone generally consists of three elements: abrasive grains, a bonding material, and pores. While the abrasive grains actually remove material from the workpiece, it is the bonding material that securely retains the grains and significantly influences the grinding performance.
By using rubber as the bonding material, a Rubber Grinding Stone provides an appropriate level of elasticity. This allows the stone to conform to the shape of the workpiece while enabling stable finishing operations. Because of this characteristic, it is also referred to as an elastic grinding stone.
Differences Between Rubber Grinding Stones and Conventional Grinding Stones (Resinoid, Vitrified, etc.)
Rubber Grinding Stones differ from conventional grinding stones in their machining characteristics and suitable applications because they use different bonding materials.
| Comparison Item | Conventional Grinding Stones (Resinoid, Vitrified, etc.) |
Rubber Grinding Stone |
|---|---|---|
| Bonding Material | Resin or vitrified material | Rubber |
| Elasticity | Low | High |
| Conformity to the Workpiece Surface | Relatively low | High |
| Typical Applications | Grinding and deburring | Fine deburring, polishing, and surface finishing |
Rubber Grinding Stones offer excellent conformity to the workpiece surface. Depending on specifications such as grit size and hardness, as well as the machining conditions, they can help suppress excessive cutting while making it easier to achieve a stable finish.
Characteristics and Advantages of Rubber Grinding Stones
The conformity provided by their elasticity helps improve machining consistency.
- Easily conforms to the workpiece surface
- Effective for removing fine burrs
- Well suited for complex workpiece geometries
- Less prone to bouncing and chatter, making it easier to achieve a stable surface finish
- Available in various grit sizes and shapes to suit different applications
Rubber Grinding Stones also feature a self-sharpening action. As the rubber bond wears at an appropriate rate during machining, worn abrasive grains are released and new abrasive grains are exposed on the surface. This helps maintain cutting performance and contributes to stable machining performance.
In addition, the elasticity of the rubber reduces vibration and operator fatigue compared with conventional grinding stones, improving workability. Rubber Grinding Stones are also easy to handle for less experienced operators and female workers.
Typical Applications of Rubber Grinding Stones
Rubber Grinding Stones are used in a wide range of machining processes.
- Grinding and polishing: Removing machining marks (tool marks), scratches, and weld beads
- Deburring: Removing fine burrs from metal components and other workpieces
- Intermediate and final finishing: Improving surface roughness and producing mirror finishes on molds and metal surfaces
- Surface preparation: Removing rust, oxide films, and contaminants, as well as preparing surfaces before plating or painting
Depending on the application, Rubber Grinding Stones may be used with handheld tools or integrated into machining centers and dedicated production equipment.
Key Points for Tool Selection
Selecting the specifications of a Rubber Grinding Stone that best match the machining application and operating environment is essential.
The machining performance of a Rubber Grinding Stone varies depending on the combination of grit size, abrasive type, hardness, shape, and other specifications. Therefore, it is important to select the appropriate product based on the workpiece material, the required surface finish, the geometry of the machining area, and the equipment being used.
Daiwa Rabin Co., Ltd. offers the elastic Rubber Grinding Stone "DAIWA RABIN", which utilizes the conformity provided by rubber elasticity and the self-sharpening action. We also provide recommendations and custom manufacturing of products tailored to specific workpieces, equipment, and machining conditions.
Summary
In a grinding stone, rubber plays an important role as the bonding material that holds the abrasive grains in place.
Thanks to the unique elasticity of rubber, Rubber Grinding Stones are widely used in processes where stable machining quality is required, including deburring, polishing, and surface finishing. To fully utilize their performance, it is important to select the appropriate product according to the workpiece material, machining process, and production equipment.
Daiwa Rabin Co., Ltd. offers an extensive lineup of Rubber Grinding Stones and provides recommendations as well as custom manufacturing based on individual machining conditions and production equipment. If you need assistance selecting a Rubber Grinding Stone or improving your machining process, please feel free to contact us.
