Last Updated： Aggregation Period:Mar 25, 2026～Apr 21, 2026
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The Serapoblock has become a sheet type.
Ceramic Sheet Uses Rust removal, fine burr removal, polishing finish, surface preparation before mirror finish, fine scratch removal, removal of discoloration from welds, paint stripping, hairline correction (#46・80) Other applications can be expanded depending on creativity. Features Can be freely cut with a utility knife or similar tool.
The highly acclaimed Goman Stone series now introduces a block type! A grip shape that provides excellent control!
We would like to introduce "Hand Block," handled by Okasugi Co., Ltd. It fits perfectly in the palm of your hand and allows for a strong polished finish. The handle is made of natural wood. We offer generous sizes of 45×100 and 23×100, enabling quick and efficient work. 【Features】 ■ Fits snugly in the palm of your hand ■ Allows for a strong polished finish ■ Sizes: 45×100, 23×100 ■ Enables quick and efficient work ■ Handle: Made of natural wood *For more details, please refer to the PDF document or feel free to contact us.
Perfect for final finishing and mirror polishing!
The product we would like to introduce from our main product line of mold grinding wheels is the "YTM." The "YTM" is a resin-based grinding wheel developed for the final finishing and mirror polishing of molds. It provides a wonderful gloss due to its soft touch and moderate strength (equivalent to wood). It is ideal for corners and grooves that are difficult to polish with paper, and it achieves more than five times the gloss compared to ceramic grinding wheels. The grinding wheels are color-coded by grit size, making them easy to manage, and they can be safely used for polishing non-ferrous metals. The grinding wheels come in two hardness types: hard and soft. *As it is a combustible solid, please ensure that the grinding wheels are dried naturally. This can cause a fire hazard. Currently, we are offering free samples, so please feel free to contact us for more details! ↓↓↓
Perfect for final finishing and mirror polishing!
The product we are introducing this time from our main product line of mold grinding wheels is called 'YTM'. 'YTM' is a resin-based grinding wheel developed for the final finishing and mirror polishing of molds. It provides an excellent gloss with a soft touch and moderate strength (equivalent to wood pieces). It is ideal for corners and grooves that are difficult to polish with paper, achieving more than five times the gloss compared to ceramic grinding wheels. The grinding wheels are color-coded by grain size, making them easy to manage, and they can be safely used for polishing non-ferrous metals. The grinding wheels come in two hardness types: hard and soft. *Due to being a flammable solid, please ensure that the grinding wheels are dried naturally. This can cause a fire hazard. Currently, we are offering free samples, so please feel free to contact us for more details!!
Grinding stone using C abrasive particles.
The product we would like to introduce from our main product line of mold grinding wheels is the product called 'C'. It is a ceramic grinding wheel that uses C abrasive grains. It has less wear than WA grinding wheels and is suitable for polishing castings and press molds. The available grit size ranges up to #2000. Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓ --------------------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp ---------------------------------------------
Grinding stone using PA abrasive particles.
The product we would like to introduce from our main product line of grinding wheels is the item called 'PA'. It is a ceramic grinding wheel that uses PA (Pink Alundum) abrasive grains. It is ideal for dry use in polishing press molds and similar applications. Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓ --------------------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp ---------------------------------------------
Using GC, the hardest among the abrasive grains.
The product we would like to introduce from our main product line of mold grinding wheels is the 'GC' product. This is a ceramic grinding wheel that uses GC abrasive grains, which have the highest hardness among abrasives. It generates little heat, making it suitable for grinding materials that are sensitive to heat. It enables precise grinding of hard materials such as carbide tools and superalloys. Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓ --------------------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp ---------------------------------------------
The most commonly used whetstone.
The product we would like to introduce from our main product line of grinding wheels is the "WA" product. The WA grinding wheel is a ceramic-based grinding wheel that uses WA abrasive grains and is the most common type. It has good breakage resistance and generates little heat, making it suitable for grinding operations with a wide contact area between the workpiece and the grinding wheel, as well as for finishing and light grinding of high-speed steel and special steel. Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓ --------------------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp ---------------------------------------------
Suitable for dry use.
The product we would like to introduce from our main product line of mold grinding wheels is the "YHB." The "YHB" is a ceramic grinding wheel for rough to medium finishing, which is impregnated with general-purpose phenolic resin on a WA grinding wheel. Due to its high resin strength, it is less likely to break under heavy loads during grinding, such as rib polishing, and it experiences less wear even when grinding rough surfaces. It is suitable for cases where a dry-use option is needed. The hardness of the grinding wheel is of type "I." We are currently offering free samples, so please feel free to contact us for more details!! ↓↓↓ ---------------------------------- Yamato Grinding Wheel Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp
All-rounder in mold grinding
The product we would like to introduce from our main product line of mold grinding wheels is the 'YHZ'. The 'YHZ' is a ceramic grinding wheel developed for semi-finishing and finishing applications. While the grinding wheel does wear slightly, it exhibits outstanding grinding performance. It is an all-rounder that can be adapted to all types of mold steel, regardless of whether dry or wet grinding is used. It also has good compatibility with both oil-based and water-soluble oils, and it is environmentally friendly, containing no harmful substances to humans or the environment. The hardness of the grinding wheel comes in two types: "L" (hard) and "J" (soft). Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓ ---------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp
The mold grinding stone with the highest strength in the YH series.
The product we would like to introduce from our main product line of mold grinding wheels is the 'YHB-T'. This is a ceramic grinding wheel for rough to medium finishing, which is impregnated with high-fracture-resistance phenolic resin in WA grinding wheels, and it is the strongest product in the YH series. It provides a smooth finish when cutting and removing the altered layer of materials after machining or electrical discharge machining, especially when surface roughness is a priority. Additionally, due to its strength, it is less likely to break during roughing operations under load or when working with small-sized grinding wheels. However, it tends to clog easily in dry conditions, so please use it wet. We recommend "BLUE CUT" from our company. The hardness of the grinding wheels comes in three types: "L" (hard), "J" (medium), and "H" (soft). Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓
It has a strong retention of sulfur intensity, is difficult to break, and has excellent workability.
The product we would like to introduce from our main product line of mold grinding stones is the product called "YHS." This is a grinding stone that has sulfur impregnated into a WA grinding stone. By adhering sulfur to the pore walls of the grinding stone, it can prevent grinding marks on molds. It has a moderate strength retention of sulfur, making it less likely to break and excellent in workability. Additionally, the lubricating effect of sulfur improves the surface roughness of the mold and significantly reduces the wear of the grinding stone. The hardness of the grinding stone is of type "I." (Note) As it is a flammable solid, please ensure that the grinding stone is dried naturally. It may cause a fire. Currently, we are offering free samples, so please feel free to contact us for more details!! ↓↓↓ ---------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp
Excellent work efficiency at low speed - Buffing wheel
Usage Deburring, chamfering, surface finishing Features Please strictly adhere to the maximum rotation speed. (There is a risk of bursting or cracking, which is dangerous.) Always use flanges on both sides. (Fix with flanges corresponding to 70% of the grinding wheel's outer diameter.) Produces minimal dust, noise, and vibration, making it hygienic. No secondary burrs (return burrs) are generated.
Rubber endless belt
Usage Polishing, micro-burr removal, R surface finishing Features Can create a smooth surface without scratching the material. Produces minimal dust and is hygienic. No secondary burrs (return burrs) are generated.
"Providing a higher level of all-purpose." Perfect for deburring after machining!
This product is designed for disc grinders and significantly improves the product lifespan, which has been a problem with conventional flexible grinding wheels. With the greatly improved lifespan, it can be used for multiple purposes with just one piece, reducing the hassle of attaching it to the grinder. 【Features】 ■ Significantly improves the product lifespan, which has been an issue with conventional flexible grinding wheels ■ Can be used for multiple purposes with just one piece ■ Reduces the hassle of attaching it to the grinder ■ Produces less burr *For more details, please refer to the PDF document or feel free to contact us.
When it comes to whetstones, leave it to us.
This catalog is a comprehensive catalog featuring grinding wheels from Sanko Seito Co., Ltd. It includes products such as the "NEX'US Z3 TYPE 100," which quickly cuts through materials, the "NEX'US Z3," which allows you to experience its grinding power even on stainless steel, and the "NEX'US," which was one of the first to adopt zirconia abrasive grains in flexible grinding wheels. [Contents] ■ Rigid Cutting and Grinding ■ Soft Cutting and Rigid Polishing ■ Fast Polishing and Soft Polishing ■ Cutting *For more details, please download the PDF or feel free to contact us.
Oil whetstone stick type available in various sizes and multiple grits. Achieve deburring and chamfering in hard-to-polish grooves with the stick type!!
The term "oil stone" comes from the practice of using oil, such as kerosene or grinding oil, which is absorbed into the stone. Oil stones are made from A-grade abrasive particles, have a wide range of grit sizes, and possess a strong structure that makes them resistant to shape distortion. Our company manufactures and sells various shapes of stick-type oil stones in addition to the common rectangular shape, which has been well received by users for enabling efficient work for different applications. 【Main Uses】 Square: Deburring grooves, polishing flat surfaces Triangular/Rhombus: Deburring grooves, polishing groove entrances Round/Half-Round/Elliptical: Polishing the inner surfaces of hole diameters Pointed: Polishing sharp corners We are currently offering free samples, so please feel free to contact us for more details!! ↓↓↓ ---------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp
Stick-type triangular design allows for precise deburring and chamfering!!
The term "oil stone" comes from the practice of using oil, such as kerosene or grinding oil, which is absorbed into the stone. Oil stones are made from A-grade abrasive particles, have a wide range of particle sizes, possess strength, and are less prone to shape distortion. Our company manufactures and sells various shapes of stick-type oil stones in addition to the common "rectangular" shape, which has been well received by users for enabling efficient work according to different applications. 【Main Uses】 Square: Deburring of grooves, bottom surface polishing Triangular/Rhombic: Deburring of grooves, polishing of groove entrances Round/Half-Round/Elliptical: Internal surface polishing of hole diameters Pointed: Polishing of sharp corners We are currently offering free samples, so please feel free to contact us for more details!! ↓↓↓ ---------------------------------- Yamato Seito Co., Ltd. Sales Department 5-1613 Hata, Kashiba City, Nara Prefecture 639-0245 TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp
Oil sharpening stones in stick form available in various sizes and grit levels. Achieve internal diameter polishing of hole diameters and edge beveling with the stick type!
The term "oil stone" comes from the practice of using oil, such as kerosene or grinding oil, which is absorbed into the stone. Oil stones consist of A-grade abrasive particles, have a wide range of particle sizes, and are characterized by their strength and resistance to shape distortion. Our company manufactures and sells various shapes of stick-type oil stones in addition to the common rectangular shape, and we have received positive feedback from users for their efficiency in various applications. 【Main Uses】 Square: Deburring grooves, surface polishing Triangle/Rhombus: Polishing groove entrances Round/Half-round/Elliptical: Internal polishing of hole diameters Point: Polishing sharp corners We are currently offering free samples, so please feel free to contact us for more details!! ↓↓↓ ---------------------------------- Yamato Seito Co., Ltd. Sales Department 〒639-0245 1613 Hata 5-chome, Kashiba City, Nara Prefecture TEL: 0745-77-2955 FAX: 0745-78-0667 Email: yamato@yamatoseito.co.jp URL: http://www.yamatoseito.co.jp
Outstanding grinding power and durability! Available in φ175mm, φ125mm, and φ100mm.
We would like to introduce our ceramic abrasive material, the "Happy Fiber Disc." Compared to offset grinding wheels, it has a softer touch, less vibration, and reduced sparks due to its structure. Please feel free to contact us if you need any assistance. 【Available Sizes】 ■Φ175mm ■Φ125mm ■Φ100mm *For more details, please download the PDF or feel free to contact us.
Basic set for trying out the Serapozisuku: Finishing Disc Grinder Set DS-1
Usage Deburring, removing fine scratches, rust removal Removing welding discoloration, polishing before mirror finishing Features Suitable for various materials Iron, stainless steel, aluminum, copper, brass, stone, etc. [Set Contents] Finishing disc grinder TS100-V (5500 RPM) 1 unit Ceramic polishing disc D80 #80 1 piece D120 #120 1 piece D220 #220 1 piece
The wide type can be produced with a grinding stone width of up to 405! It provides stable grinding performance that meets the process capability index.
The "Centerless Grinding Wheel" meets the process capability index with stable grinding performance. Available in two-layer types #80 and #100. The wide type can be manufactured with a wheel width of up to 405. We offer a lineup including vitrified, resin-bonded, and plastic wheels. 【Features】 ■ Stable grinding performance meets the process capability index ■ Two-layer types #80 and #100 ■ The wide type can be manufactured with a wheel width of up to 405 *For more details, please refer to the PDF document or feel free to contact us.
Universal grinding wheel that can perform grinding and polishing simultaneously - Tact Disc
Uses Light grinding, polishing, chamfering, deburring, rust removal, paint stripping, heat discoloration removal, dirt removal. The applications can be expanded with various creative uses. Features Simultaneous grinding and polishing effects can be achieved. There is minimal dust, noise, and vibration, making it hygienic. It has low thermal conductivity to the material, making it resistant to heat discoloration. Secondary burrs do not occur.
Ideal for face finishing and polishing - Ceraposic.
Ideal for surface preparation and polishing Ceraposic Applications Surface preparation before mirror finishing, polishing, removing micro-burrs, removing scratches, rust removal, dirt removal, and removing discoloration from welds. The applications can be expanded with various creative uses. Features It can create a smooth surface without damaging the material. It generates minimal dust, noise, and vibration, making it hygienic. It has low thermal conductivity to the material, making it resistant to discoloration. Secondary burrs do not occur.
We have a wide range of cutting wheels available!
Processing with precision cutting wheels involves the use of high-speed rotating cutting wheels that are extremely thin (0.3mm to 1.2mm). This method is a type of precision machining that gradually shaves the workpiece using very hard particles (grains) that make up the wheel. It acts softly without causing destructive damage to the workpiece, resulting in a good surface finish, sharp cutting performance, and excellent grinding capabilities, boasting high-speed cutting that contributes to the reduction or elimination of secondary processing, thus lowering costs. The Precision Cutting Wheel Tokuwu Stone Series is manufactured under strict quality control in the Nasu factory, located in Nasu Town, Tochigi Prefecture, where temperature and humidity are kept constant to maintain stable quality on the production line. The Diamond Cutting Wheel Naston Gold Series for hard and brittle materials is a developed product made using high-quality diamond grains and a unique resin. It demonstrates its power in cutting hard and brittle materials such as cemented carbide, ceramics, hard glass, and sapphire glass, as well as difficult-to-machine composite materials, which are challenging to cut with general cutting wheels.
Amazing removal performance Tact Disk Black Skin Removal
Usage Removing scale, rust removal, paint stripping, etc. Features Removing scale, rust removal, paint stripping Does not excessively grind the material.
The hard select Arkansas whetstone is recommended when you want to sharpen knives and tools more delicately.
● This is an alkansas with a specific gravity of 2.30-2.45, which is intermediate among our alkansas. This whetstone often comes in various colors. ● Since it is quarried from nature, you cannot specify the size, mesh, or color. Please choose from the item number.
The hard select Arkansas whetstone is recommended when you want to sharpen knives and tools more delicately.
● This is an alkansas with a specific gravity of 2.30-2.45, which is intermediate among our alkansases. This whetstone often comes in various colors. ● Since it is cut from nature, you cannot specify the size, mesh, or color. Please choose from the item number.
For tasks requiring a high-quality finish! A natural substitute made from A abrasive grains.
The 'Oil Stone - White' is a natural substitute made from A abrasive particles (equivalent to 3000 grit). It is used for tasks that require a high-quality finish. In addition to this product, we also offer other items such as the Alcanthus oil stone. [Product Lineup] ■NO.H105: 75×25×9mm ■NO.H104: 100×25×13mm *For more details, please refer to the PDF document or feel free to contact us.
For chamfering work on general steel, stainless steel, etc.! It produces minimal secondary burrs and allows for clean grinding.
The "Ikemen Series" is a specialized grinding stone designed specifically for chamfering work. As a result of comparing the marks left by touching with work gloves after chamfering with conventional products, there was no fiber snagging. 【Features】 ■ Specially designed for chamfering work ■ Produces minimal secondary burrs and allows for clean grinding ■ Offset type with excellent durability
