スガワラ List of Products and Services

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.

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.

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 "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.