三協インターナショナル List of Products and Services

We would like to introduce the "large weights" that we handle. We offer a wide range of materials, including "stainless steel," which excels in durability, corrosion resistance, strength, and hardness, as well as "cast iron," which is superior in terms of hardness and wear resistance. By combining individual weights, it is also possible to set any desired large mass. We can design and manufacture shapes according to your requests. Please feel free to contact us when you need assistance. 【Product Lineup】 ■ Large weights made of stainless steel ■ Large weights made of cast iron ■ Large weights made of steel *For more details, please download the PDF or feel free to contact us.

• Copper and bronze fittings

This product is manufactured through machining, unlike the process of cast iron weights made using mold forming, resulting in excellent dimensional consistency and parallelism between the bottom and top surfaces of the weights. Therefore, the weights can be stacked in a stable manner. The nominal values range from 1 kg to 200 kg in a pillow shape, with a grade of M1.

• Other measuring instruments

Various types of weights in plate, cylindrical, or pillow shapes, corresponding to the scale's capacity, are stored in a resin case. The interior lining of the case uses polyurethane cushioning material to prevent scratches during the transportation of the weights. Plate weights with a nominal value of 1g or less are stored in a silicone container with dividers. Additionally, if the total mass of the stored weights exceeds 20kg, there is also a storage case with casters, making transportation to the site easier.

• Measurement and analysis equipment leasing and rental

Automatically add or remove chain weights (material: stainless steel) according to the weighing capacity and scale of the non-automatic scales (hereinafter referred to simply as "scales") subject to inspection, and conduct error tests and eccentricity tests at the specified inspection points. In particular, for the eccentricity test, by inputting the size of the weighing platform (width/depth) in advance, the system will automatically move to the position specified by technical standards and conduct the test. Additionally, the display value of the scale will be read by a CCD camera, processed through image processing, and the results will be calculated using Excel.

• Measurement and analysis equipment leasing and rental

Our company has a long-standing track record as a weight manufacturer and provides various weights, including standard weights, in addition to offering 'JCSS Calibration Services.' Calibration for nominal values from 1mg to 20kg is classified as accuracy grade class E (equivalent to JIS B 7609 E2 grade), while calibration for nominal values from 50kg to 1000kg is classified as F2 (equivalent to JIS B 7609 F2 grade). Four skilled calibrators are stationed on-site, and we respond to requests and issue certificates within a basic timeframe of five business days. ■ Our calibration center is a registered and certified business under the Measurement Law Calibration Business Registration System. (Registration Number: JCSS 0345) ■ We also offer convenient weight rental services for those requiring weights with assured traceability, and we can provide them with JCSS calibration certificates. ■ Starting in 2024, we will also begin JCSS calibration for large weights (nominal values from 50 to 1000kg).

• Other services and technologies

Sankyo International offers related products to maintain the precision of delicate weights. We have a variety of tweezers with soft resin tips for gripping weights, grips that are easy to handle even with heavy weights, forks, and uplocks.

• Other analytical equipment

Our company is accredited under JCSS, which operates according to the ISO/IEC 17011 standard, using JIS Q 17025 (ISO/IEC 17025) as the certification criteria. The accreditation body operating JCSS (IAJapan) has signed mutual recognition agreements with the Asia-Pacific Accreditation Cooperation (APAC) and the International Laboratory Accreditation Cooperation (ILAC). Our calibration laboratory is an international MRA-compliant JCSS accredited organization. JCSS 0345 is the accreditation number of our calibration laboratory. [Calibration Targets] ■ Weights ■ Masses *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce the "rental weights" that we handle. We have a wide variety of "large weights" ranging from 1000kg to 50kg, as well as set weights including "disk-type combination weights" and "cylindrical and plate-type combination weights." Additionally, we also offer individual weights such as "stainless steel pillow weights" and "cast iron pillow weights." Please feel free to contact us when you need assistance. 【Main rental weights (partial list)】 ■ Large weights ■ Set weights ・ Disk-type combination weights ・ Cylindrical and plate-type combination weights * For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce the "weight case" that we handle. This is a dedicated case for the delicate transportation and storage of weights. We offer a variety of aluminum cases that safely store weights while maintaining their precision and beauty, and we also accept custom case manufacturing. Please feel free to contact us for more details about the products. 【Features】 ■ Safely store weights while maintaining their precision and beauty *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We accept the manufacture of "custom weights." We design, produce, and provide weights tailored to the conditions and uses of the location where they will be used. Please feel free to contact us when placing an order. 【Features】 ■ Design, production, and provision of weights according to the conditions and uses of the location * For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce the "Newton weights" that we handle. They have a step and groove design to prevent slipping, providing stability, and can be stacked multiple times. For example, they are used for calibrating mass measurements in hanging scales. Please feel free to contact us if you have any inquiries. 【Lineup】 ■ Non-magnetic stainless steel added weight type Newton weights ■ Brass chrome-plated added weight type Newton weights ■ Stainless steel added weight type Newton weight stands *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce our "additional weight type weights" that we handle. Available in 11 nominal values ranging from 10g to 20kg, categorized into three grades. Additionally, we offer a dedicated stainless steel base for the additional weight type weights, which can be treated in the same manner as the weights themselves. The maximum allowable error for the base is M1 grade, but custom products can be manufactured in shapes and dimensions according to your needs. 【Lineup】 ■ Non-magnetic stainless steel additional weight weights ■ Brass chrome-plated additional weight type weights ■ Stainless steel additional weight type weight bases *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce the "disk weights" that we handle. We offer three types: "non-magnetic stainless steel disk weights," "brass chrome-plated disk weights," and "painted iron weights." These weights have grooves and steps to prevent slipping, providing stability and allowing for stacking multiple pieces. Additionally, as practical standard weights, they are suitable for testing the reproducibility and linearity of scales using multiple weights, as well as for other calibration, adjustment, and inspection purposes. 【Product Lineup】 ■ Non-magnetic stainless steel disk weights ■ Brass chrome-plated disk weights ■ Painted iron weights *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce the "plate weights" that we handle. We offer OIML-type "non-magnetic stainless steel plate weights and wire weights." They are excellent in corrosion resistance and wear resistance, both being small mass weights ranging from 1mg to 500mg. As an example of use, they are suitable for calibration, adjustment, and inspection of high-precision scales that require precision below the mg level. 【Lineup】 ■ OIML-type non-magnetic stainless steel plate weights and wire weights *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce the "standard weight cylindrical weights" that we handle. We offer two types: "non-magnetic stainless steel standard weights" and "brass chrome-plated standard weights." These comply with the Measurement Act and can be certified as standard weights by undergoing inspections at measurement verification institutes, similar to OIML types. The standard weights are available in 14 nominal values ranging from 1g to 20kg, categorized into three grades, and we also provide dedicated aluminum cases and plastic cases. 【Product Lineup】 ■ Non-magnetic stainless steel standard weights ■ Brass chrome-plated standard weights *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

The "OIML-type cylindrical weight" is a product made of non-magnetic stainless steel that excels in corrosion resistance and wear resistance. It not only complies with the recommendations of the International Organization of Legal Metrology (OIML) but also adheres to the Measurement Law. By undergoing inspections at metrology laboratories, it can be certified as a reference weight. We offer 14 different nominal values ranging from 1g to 20kg, categorized by grade, and they can be stored in a set aluminum case or plastic case. 【Lineup】 ■ OIML-type non-magnetic stainless steel cylindrical weights (with case) *For more details, please refer to the PDF document or feel free to contact us.

• Other analytical equipment

We would like to introduce our "set weights" that we handle. We offer a set of non-magnetic stainless steel OIML-type cylindrical weights stored in an aluminum case. We have nine types of sets available, ranging from a 1g set of flat weights to sets of cylindrical weights from 100g to 20kg, categorized by grade. Using set weights makes it easy to maintain, manage, and store the precision of the weights. 【Lineup】 ■ Stainless steel OIML-type set weights (with aluminum case) *For more details, please refer to the PDF document or feel free to contact us.

• Measurement and analysis equipment leasing and rental

The "large weights" come with lifting fixtures, allowing for handling with cranes, forklifts, etc. Being square-shaped makes stacking easy. The stainless steel large weights can be upgraded to grade F2. 【Features】 ■ Comes with lifting fixtures ■ Can be handled with cranes, forklifts, etc. ■ Easy to stack due to square shape ■ Can be upgraded to grade F2 (stainless steel) *For more details, please refer to the PDF document or feel free to contact us.

• Other measuring instruments

The "pillow-shaped weights" are suitable for calibrating scales with a large capacity. They come with handles for easy transport and can be stacked easily. They serve as practical standard weights and practical reference weights. 【Features】 ■ Compatible with calibration of scales with a large capacity ■ Easy to carry ■ Stackable ■ Useful as practical reference weights *For more details, please refer to the PDF document or feel free to contact us.

• Other measuring instruments

"Special weights" are weights used for specific purposes, such as annular weights with a ring attached for hanging, which are used in applications like hanging weights (tensile weights) and for in-use inspections of hanging spring scales at testing laboratories. Customization of shapes and other features is also possible according to other applications. 【Features】 ■ Supports special applications ■ Effective for in-use inspections of hanging spring scales ■ Customization of shapes and other features is possible *For more details, please refer to the PDF document or feel free to contact us.

• Other measuring instruments

Sankyo International Co., Ltd. is a company that supports small and medium-sized enterprises in their business activities in China. The "weights" we handle include a wide variety of products, from large weights (stainless steel and cast iron) ranging from 1mg to 1,000kg, to OIML-type cylindrical weights, sets of weights, and reference weights in cylindrical form (stainless steel and brass). Please choose according to your needs from our extensive lineup. 【Features】 ■ Extensive lineup ■ Weights available from 1mg to 1,000kg *For more details, please refer to our catalog or feel free to contact us.

• Surveying