"Shot and grit" shape of abrasives

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last updated：May 02, 2025

原田鉄工

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"Shot and grit" shape of abrasive materials

The difference between shot and grit is not in the material or processing method, but in the shape. There are various shapes of abrasives (grinding materials) used in blast processing, and the processing effect and finish can vary greatly depending on the shape. "About the shapes of blast abrasives" The shapes of abrasives can be broadly divided into three types: 1. Spherical / Round Cut This shape is cylindrical or polygonal with edges ground to approach a spherical form, referred to as "shot," "beads," or "round cut," with many products named with the material name before or after. Example: Steel shot, stainless beads 2. Cylindrical / Wire Cut This shape is cylindrical, created by finely cutting wire material. It is referred to as "wire cut" or "cut wire," with many products named with the material name before or after. Example: Steel cut wire, stainless cut wire 3. Polygonal / Sharp Angle This shape has many sharp angles and is characterized by a polygon with many pointed corners. It is referred to as "grit," with many products named with the material name before or after. Example: Steel grit, stainless grit

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"Differences in Processing Effects Based on Shape" The shape of the abrasive material significantly affects the finish, processing effect, and degree of damage after processing. 1. Spherical/Round Cut Due to its spherical shape, it allows for processing that minimizes damage to the workpiece. By processing in a manner that strikes the surface, it forms round indentations. It is often used for processing effects such as creating fine unevenness, matte finishing, deburring, and removing residual stress through shot peening. 2. Cylindrical/Wire Cut With a cylindrical shape and edges on the circular part and cutting surface, the degree of damage to the workpiece is intermediate between spherical and polygonal shapes. Although the edges of the cutting surface are not sharp, it is possible to roughen the surface. It is often used for deburring purposes as it does not have a high cutting force. 3. Polygonal/Sharp Angle Due to its irregular and sharp-angled shape, it has strong grinding power and creates random unevenness on the surface of the workpiece, resulting in a higher degree of damage. It forms an optimal anchor pattern that greatly enhances adhesion for paints and adhesives. It is often used for surface preparation before painting (substrate treatment), removal of old paint films or resins, and rust removal.

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Turning your troubles into satisfaction. We respond to the needs of our customers. From "nothing" to "something." Creating "one-of-a-kind" rather than "mass production." Harada Iron Works is here to fulfill your desires. We provide a consistent production service from material procurement to painting and installation, helping to shorten delivery times and reduce total costs to meet various customer needs. With over 70 years of experience, we are committed to providing even greater "high added value" products through the skills and know-how we have honed over the years. If you have any inquiries regarding production or painting, please feel free to contact us. We look forward to hearing from you. For blasting and painting, leave it to us. Harada Iron Works Co., Ltd. Hiroshima TEL: 082-232-2445 FAX: 082-293-0286 Contact: Tao Mobile: 090-3742-9768 Email: bousei@harada-tekkou.co.jp Please feel free to contact us for consultations or estimates.