スガワラ List of Products and Services

We will introduce a comparison between SUS304CP and SUS304CSP. There are various types of SUS304 steel plates and strips, but in our company, we use SUS304-CP for parts that do not require much springiness (some refer to it as SUS304-2B based on the surface finish). For parts that require springiness, we use SUS304-CSP, and we differentiate between tempering grades 1/2H, 3/4H, and H according to the required workability and durability of the spring. SUS304 has differences in thickness tolerances and tensile strength according to standards, so you can view the details in the related links. [Tempering Overview] ■ Order of workability: 1/2H, 3/4H, H ■ Order of spring durability: H, 3/4H, 1/2H *For more details, please refer to the related links or feel free to contact us.

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Spring steel and carbon tool steel with carbon content of 0.4% or more increase in hardness by 2 to 3 times through heat treatment (quenching). By processing in a soft state before heat treatment and then increasing the hardness afterwards, complex shapes can be formed. They are characterized by low heat resistance and strong magnetism. As a note, they are prone to rust, so surface treatment measures are necessary. 【Overview】 ■ Carbon tool steel, etc., increases in hardness by 2 to 3 times through heat treatment (quenching) ■ Complex shapes can be processed by increasing hardness afterwards ■ Characterized by low heat resistance and strong magnetism *For more details, please refer to the related links or feel free to contact us.

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Our company supports the Sustainable Development Goals (SDGs) proposed by the United Nations and will actively engage in efforts to realize a sustainable society. In terms of work-life balance, we will implement systems for maternity leave, parental leave, and other types of leave. In energy conservation and electricity saving, we will promote energy efficiency through process improvements and waste reduction. For additional information, please refer to the related links. We encourage you to read them. 【Specific Initiatives (Excerpt)】 ■ Creating an environment that makes it easy to take various types of leave ■ Promoting energy efficiency through process improvements and waste reduction ■ Establishing rules for handling computers and storage media ■ Accepting internships from local educational institutions *For more details, please refer to the related links or feel free to contact us.

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Here are some trivia related to spring manufacturing. "Shot peening" involves striking the surface of a spring with small metal balls at speeds ranging from about 40m to 100m per second. This process induces inertial processing on the surface, resulting in the generation of residual stress in the compressive direction, which improves the durability of the spring. " milling" is a type of cutting process that uses tools such as face mills, slab mills, and end mills to perform machining on flat surfaces, side surfaces, grooves, and drilling, among other operations. We mainly use it for the production of leaf springs and fittings. [Knowledge Introduction List] ■ Considerations for designing compression coil springs ■ Shot peening ■ General tempering temperatures for stainless steel ■ Effects and applications of barrel polishing ■ Milling *For more details, please refer to the PDF materials or feel free to contact us.

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We manufacture custom-made disc springs and washers tailored to your needs and challenges. 【Solving these issues】 ■ Considering prototype products with the same shape but different plate thicknesses. ■ Wanting a specific load but unsure of the shape. ■ Looking to strengthen the characteristics of the currently used product. 【Features】 ■ Capable of accommodating a variety of applications and loads through various combinations. ■ Designing and manufacturing a wide range of disc springs and washers in small quantities. ■ Able to handle large loads in a compact space. *For more details, please contact us, or download our catalog to learn about "Spring Trivia."

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Sugawara, which handles important products for social infrastructure such as electric energy and transportation, has received not only ISO certification but also quality certifications from various customers. We conduct inspections using measuring instruments that comply with international standards for load characteristics, dimensions, hardness, and more, and our high quality has earned us great trust from various industries and sectors. Since our founding, our commitment to quality has garnered high evaluations and trust from users. We have obtained ISO 9001/20015 certification and are working towards becoming a company that customers can "choose" with customer satisfaction as our top priority. We provide products for social infrastructure equipment directly connected to lifelines. For more details, please contact us or refer to our catalog.

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【Manufactured Items】 - Corrosion-resistant and heat-resistant superalloy disc springs, coil springs, and flat springs for nuclear equipment - Coil springs and flat springs, as well as assembled leaf springs for heavy electrical equipment such as circuit breakers and transformers - Springs for motors and control equipment for electric vehicles, inspection covers, constant pressure springs, and spiral springs - Corrosion-resistant and heat-resistant superalloy coil springs and flat springs for thermal power generators (for steam and gas turbines) - Various types of flat springs and coil springs for elevators and escalators - Design and manufacturing of various coil springs, flat springs, disc springs, and spring assemblies, among others *For more details, please contact us or download and view the catalog.

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We accommodate a wide range from thin to thick materials!! Our disc springs, made primarily from corrosion-resistant, heat-resistant, and difficult-to-machine materials, are used in thermal and nuclear power generation equipment. Through various combinations, we can respond to diverse applications and loads. We design and manufacture a wide variety of disc springs and washers in small lots. *For more details, please contact us or download and view our catalog.

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Our company manufactures a wide variety of multi-purpose "disc springs and washers" in various sizes and materials. We accommodate diverse applications and loads, and we can design and produce from small lots. 【Features】 ■ Various combinations ■ Adaptable to diverse applications and loads ■ Design and production from small lots *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures "leaf springs." We deliver a wide variety of leaf springs, utilizing techniques such as combined molds to perform complex processing, ranging from thin to thick materials. We also accept assembly products. 【Features】 ■ Forming various shapes of spring plates ■ Utilizing combined molds and other techniques ■ A diverse range from thin to thick materials ■ Support for assembly products *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures "spiral springs," which serve as the heart of cranes and train motors. We design and produce according to your requirements. Production tailored to sample products (actual items) is also possible. 【Features】 ■ Springs that serve as the heart of cranes and train motors ■ Boasts a high market share domestically ■ Designed and produced according to requirements ■ Production tailored to sample products is also possible *For more details, please refer to the PDF document or feel free to contact us.

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We manufacture "special springs" used in power generation equipment (thermal, hydro, nuclear). We produce springs that can withstand harsh environments with difficult quality and specification conditions. 【Features】 ■ Used in power generation equipment (thermal, hydro, nuclear) ■ Stable quality ■ Capable of handling harsh environments with difficult specification conditions *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures coil springs (wire springs) used in heavy electrical equipment, electric vehicles, thermal power, and nuclear power applications. We respond to small lots with careful handwork. We also meet specification requirements that exceed JIS standards and can perform assembly work. 【Features】 ■ Used in heavy electrical equipment, electric vehicles, thermal power, and nuclear power applications ■ A wide variety of coil springs ■ Careful handwork for small lots ■ Meeting specification requirements that exceed JIS standards ■ Assembly work is also possible *For more details, please refer to the PDF document or feel free to contact us.

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We manufacture "constant pressure springs." These are special spring assemblies used in various motors and power generation equipment (wind power) that operate under "constant pressure." We can handle the production and assembly of both the spring components and the retaining hardware. We respond to strict requirements for constant pressure loads, from small quantities to mass production. 【Features】 ■ Special spring assemblies ■ Production and assembly of retaining hardware also available ■ Support for small quantities to mass production ■ Meeting strict requirements for constant pressure loads *For more details, please refer to the PDF document or feel free to contact us.

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We deliver springs that utilize over 70 years of experience since our founding. We offer a variety of products including "disc springs and spring washers," "spiral springs," and "special springs." We can accommodate a wide range of varieties and small production runs. Please feel free to contact us. 【Products Offered】 ■ Disc springs and spring washers ■ Spiral springs ■ Coil springs ■ Leaf springs ■ Constant pressure springs ■ Special springs *For more details, please refer to the PDF materials or feel free to contact us.

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We would like to introduce some frequently asked questions from everyone. "Is it possible to manufacture the same item as the sample (actual product)?" "Can you provide the inspection results for the springs?" and so on. We will answer five questions. 【Frequently Asked Questions】 ■ Is it possible to manufacture the same item as the sample (actual product)? ■ Is it possible to manufacture without a drawing? ■ Can you provide the inspection results for the springs? ■ Do you have a catalog for standard products? ■ Is it possible to create several types of prototypes? *For more details, please refer to the PDF materials or feel free to contact us.*

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On this page, we introduce "Spring Trivia" from Sugawara Co., Ltd., which handles important products related to social infrastructure such as electric energy and transportation. Piano wire is a high carbon steel containing 0.75 to 0.85% carbon (C). After heat treatment, it is cold drawn, which increases its tensile strength and gives it high quality strength (the spring is durable) as a practical material. It has low heat resistance and strong magnetism. It is prone to rust, so surface treatment and other measures are necessary. 【Features of Piano Wire】 - High carbon steel containing 0.75 to 0.85% carbon (C) - Increased tensile strength after heat treatment and cold drawing - Low heat resistance and strong magnetism - Prone to rust, requiring surface treatment and other measures, etc. *For more details, please refer to the PDF document or feel free to contact us.

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On this page, we introduce "Spring Trivia" from Sugawara Co., Ltd., which specializes in the design and manufacturing of special springs. Stainless steel means "rust-free," but more precisely, it is "rust-resistant" steel. When chromium is added to iron, it combines with oxygen to form a thin protective film on the surface of the steel. This film prevents the progression of rust. Its heat resistance is superior compared to piano wire, spring steel, and carbon tool steel. 【Characteristics of Stainless Steel】 ■ More precisely, it is "rust-resistant" steel ■ Chromium combines with oxygen to create a film on the surface of the steel that prevents rust progression ■ Superior heat resistance compared to piano wire, spring steel, and carbon tool steel *For more details, please refer to the PDF document or feel free to contact us.

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This page introduces the calculation methods for compressed coil springs. Based on formulas compliant with JIS B 2704, it includes examples of spring constant calculations, as well as values for load and stress. The names and units of the symbols included in the formulas are also clearly explained. 【Contents】 ■ Calculation formulas ■ Load ■ Stress ■ Various calculation values ■ Symbol explanation table, etc. *For more details, please refer to the PDF document or feel free to contact us.

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This page introduces the calculation method for tension coil springs. Based on the calculation formulas compliant with JIS B 2704, it includes examples of spring constant calculations, as well as values and drawings for load and stress. The names and units of the symbols included in the formulas are also clearly explained. 【Contents】 ■ Calculation formulas ■ Load ■ Stress ■ Calculated values and drawing values ■ Symbol explanation table, etc. *For more details, please refer to the PDF document or feel free to contact us.

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Are you facing any of the following issues: 'Considering the prototyping of products with the same shape but different thicknesses,' 'I need the required load, but I don't know the shape,' or 'I want to make it stronger than the characteristics currently in use'? Our company manufactures custom-made disc springs and washers tailored to your needs and challenges. If you are having trouble with springs, please take a look at our knowledge booklet! 【Features】 ■ Capable of accommodating diverse applications and loads through various combinations ■ Design and manufacture a wide variety of disc springs and washers in small lots ■ Able to handle large loads in a small space, among others *For more details, please download the PDF or contact us.

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Our company manufactures "special springs" using materials such as SUS631 and corrosion-resistant, heat-resistant superalloys (AMS5698, 5699). We meet the high quality requirements and specifications in the aerospace field. We produce springs that can be safely used even in harsh environments. 【Materials for the Aerospace Industry】 ◎ Wire Shapes SUS304-WPA, WPB, SUS631J1-WPC, corrosion-resistant, heat-resistant superalloys (AMS5698, 5699) ◎ Sheet Shapes SUS304-CSP, SUS631-CSP, corrosion-resistant, heat-resistant superalloys (AMS5542, 5696), etc. ★ For more details, please check the material list available for download in PDF format. Feel free to contact us with any inquiries.

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We manufacture "leaf springs." Utilizing various techniques such as combined molds for complex processing, we deliver a wide variety of leaf springs, from thin to thick. We also accept assembled products. 【Features】 ■ Forming various types of spring plates into different shapes ■ Utilizing combined molds and other techniques ■ A wide variety from thin to thick ■ Also accommodating assembled products *For more details, please refer to the PDF document or feel free to contact us.

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We manufacture "constant pressure springs." These are special spring assemblies used in various motors and power generation equipment (wind power) that operate under "constant pressure." We handle the production and assembly of both the spring components and the retaining hardware. We meet the stringent demands for constant pressure loads, from small quantities to mass production. 【Features】 ■ Special spring assemblies ■ Production and assembly of retaining hardware also available ■ Support from small quantities to mass production ■ Meeting stringent demands for constant pressure loads *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures coil springs (wire springs) used in heavy electrical equipment, electric vehicles, thermal power, and nuclear power applications. We respond to small lots with careful handwork. We also meet specifications that exceed JIS standards and can perform assembly work. 【Features】 ■ Used in heavy electrical equipment, electric vehicles, thermal power, and nuclear power applications ■ A wide variety of coil springs ■ Careful handwork for small lots ■ Capable of meeting specifications that exceed JIS standards ■ Assembly work is also possible *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures "special springs" used in power generation equipment (thermal, hydro, nuclear). We produce springs that can withstand harsh environments with difficult quality and specification requirements. 【Features】 ■ Used in power generation equipment (thermal, hydro, nuclear) ■ Stable quality ■ Capable of handling harsh environments with challenging specifications *For more details, please refer to the PDF document or feel free to contact us.

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Our company manufactures "spiral springs," which serve as the heart of cranes and train motors. We design and produce according to your requirements. Production tailored to sample products (actual items) is also possible. 【Features】 ■ Springs that serve as the heart of cranes and train motors ■ Boasts a high market share domestically ■ Designed and produced according to requirements ■ Production tailored to sample products is also possible *For more details, please refer to the PDF materials or feel free to contact us.

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Our company manufactures a wide variety of multi-purpose "disc springs and washers" in various sizes and materials. We accommodate diverse applications and loads, and we can design and produce from small lots. 【Features】 ■ Various combinations ■ Adaptable to diverse applications and loads ■ Design and production from small lots *For more details, please refer to the PDF document or feel free to contact us.

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The JIS standard heat treatment symbol for SUS631-CSP includes four types: O material for solution heat treatment finish, and 1/2H, 3/4H, and H for cold-rolled finish. However, due to the lack of availability of O material, our company uses SUS631-CP material instead. The chemical composition and mechanical properties of SUS631-CP and SUS631-CSPO materials are the same, but there are differences in plate thickness tolerance and manufacturing processes. The characteristic of SUS631, similar to wire, is that its tensile strength and hardness increase due to precipitation hardening heat treatment (because the added aluminum precipitates), but the conditions differ from those of wire (air-cooled after heating at 470±10°C for 1 hour). For more details, please refer to the related links. 【SUS631-CSP Heat Treatment Conditions】 ■Heat Treatment Name: CH ・Air-cooled after heating at 470±10°C for 1 hour *For more details, please refer to the PDF document or feel free to contact us.

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