スガワラ List of Products and Services

【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.

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.

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.*

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.

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.

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.

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.

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.

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.

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.

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.

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."

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.

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.