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Spring Product List and Ranking from 93 Manufacturers, Suppliers and Companies

Last Updated： Aggregation Period:Dec 24, 2025～Jan 20, 2026
This ranking is based on the number of page views on our site.

Spring Manufacturer, Suppliers and Company Rankings

Last Updated： Aggregation Period:Dec 24, 2025～Jan 20, 2026
This ranking is based on the number of page views on our site.

  1. エコールド・ジャパン Chiba//Trading company/Wholesale
  2. KALLER Kanagawa//Machine elements and parts
  3. 鶴岡発條 Yamagata//Machine elements and parts
  4. 4 ダドコジャパン DADCO Japan, Inc. Kanagawa//Machine elements and parts
  5. 5 null/null
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Spring Product ranking

Last Updated： Aggregation Period:Dec 24, 2025～Jan 20, 2026
This ranking is based on the number of page views on our site.

  1. Gas spring (gas damper) with locking function エコールド・ジャパン
  2. Cam Unit for Press Molds "Flex Cam" KALLER
  3. Composition and Function of Gas Springs エコールド・ジャパン
  4. 4 Smorley "Wave Spring/Wave Washer"
  5. 5 Wave spring / Retaining ring

Spring Product List

346～360 item / All 382 items

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Establishment of Standards and Changes in Steel Materials in the Spring Industry during the Showa Period

Establishment of Standards and Changes in Steel Materials in the Spring Industry during the Showa Period

[Reissue Private Spring Preparatory School Lecture 10] About the spring industry during the Showa period! Establishment of various standards and specifications, from JES to JIS.

Last time, we studied the automotive and aircraft industries that form the background of the spring industry during the Showa period. Continuing from that, this time we will have a lesson on the spring industry during the Showa period. One characteristic of the Showa period that must be addressed is the establishment of various standards and specifications. The establishment of such standards can be seen as evidence of the advancement of research into industrial products. For example, regarding the Japanese National Railways, specifications for carbon steel materials for vehicle springs, wire springs for cushions, and wire and plates of phosphor bronze for springs were established in 1928. In 1930, specifications for hard-drawn steel wire for springs were established, followed by specifications for leaf springs and steel wire springs in the following year. *For detailed content of the article, you can view it in the PDF. For more information, please feel free to contact us.

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The evolution of spring technology and heat treatment methods during the Showa period and their historical background.

The evolution of spring technology and heat treatment methods during the Showa period and their historical background.

[Reissue Private Spring Preparatory School Lecture 11] Explanation of single and double quenching methods! Discussion of new materials and technologies as well.

Last time, we talked about JES and JIS, but this time let's trace the technical history of the Showa era. I gave it a confusing title like "one-stage or two-stage," but in fact, since the late Taisho period, the method of hardening spring plates has been a significant issue for the National Railways, so let me introduce the background. The term "one-stage hardening," which was used at that time (the Taisho period), refers to what we now call "austenitizing hardening," while "two-stage hardening" refers to the process of hardening and tempering. In this regard, the terminology used in heat treatment was incorrect, so although I wrote "one-stage" and "two-stage" in the title for this preparatory school, I will use the correct terms: "austenitizing hardening" for the former and "hardening and tempering" for the latter. *You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.

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The influence of dynamic stress and fatigue failure in automobile springs and its relationship with road conditions.

The influence of dynamic stress and fatigue failure in automobile springs and its relationship with road conditions.

[Reproduction of Private Spring Preparatory School Lecture 14] Characteristics of stress on springs! Used under significantly larger static and dynamic stresses.

In the last session, we started with a method for cutting wire by hand and studied fatigue testing methods, but we will continue with the lessons. As you know, springs are used in a very different way compared to general mechanical components. This is evident at a glance, as springs are often significantly bent or undergo intense stretching and contracting movements. The fact that springs are used in this manner means that they are subjected to much larger static and dynamic stresses compared to the design stresses of general mechanical components. *For detailed content of the article, you can view it in the PDF. Please feel free to contact us for more information.*

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Observation of fracture surfaces and understanding of the safety zone in fatigue testing of metallic materials.

Observation of fracture surfaces and understanding of the safety zone in fatigue testing of metallic materials.

[Reproduction of Private Spring Preparatory School Lecture 17] Metals also change when they are fatigued! An explanation of how the results of fatigue tests are organized and utilized in design.

The fracture surface of the fatigue test specimen, like that of an actual fatigue fracture, exhibits both smooth and rough surfaces. The difference is that, in many cases, the smooth surface does not show the shell-like patterns resembling tree rings. This is because the testing machine applies a constant repeated stress, preventing the progression of cracks from exhibiting a step-like pattern. The shell-like patterns that form on the fatigue fracture surface of automotive springs occur due to variations in the weight of the load or changes in road conditions, which cause fluctuations in the repeated stress. Additionally, there are instances where the smooth fracture surface of the test specimen appears discolored purple; this is due to temper colors resulting from frictional heat generated by the rubbing of the crack surfaces. *For more detailed information, please refer to the PDF. Feel free to contact us for further inquiries.*

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The Story of Butsushutarou and the Estimation Method of Fatigue Limits Learned from Static Strength and Its Practice

The Story of Butsushutarou and the Estimation Method of Fatigue Limits Learned from Static Strength and Its Practice

[Reproduction of Private Spring Preparatory School Lecture 18] Study of Fatigue Limit Estimation Method! Estimating fatigue limits from tensile strength and hardness test results.

Once upon a time, there was a story called "Monkusho Taro." It is said that he was so lazy that he would lie around all day and even relied on others to pick up the rice cakes he dropped. However, in the end, he achieved great success and was enshrined as a deity. Now, even if one does not achieve success or become a god, it can be tedious to go through exhausting tests that require both effort and time. Therefore, for those like Monkusho Taro, let’s study methods for estimating fatigue limits. This is based on the idea that there may be some relationship between fatigue limits and static strength, which many scholars are seeking to understand. The results indicate that there is a certain degree of correlation, but the variability is also quite large. The variability is not limited to just fatigue strength. *For more detailed information, please refer to the PDF. Feel free to contact us for more details.*

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The importance of factors affecting fatigue strength, such as notches and surface roughness, and their countermeasures.

The importance of factors affecting fatigue strength, such as notches and surface roughness, and their countermeasures.

[Reproduction of Private Spring Preparatory School Lecture 19] Notches reduce both static strength and fatigue strength! The scary part is the notches that are like bacteria, which are hard to see.

Last time, we studied that if we know the tensile strength of a material, we can estimate the approximate fatigue limit, and that this fatigue limit cannot be used as is. From this time onward, we will explain the factors that influence fatigue strength for a while. Have you encountered any mechanical parts in your daily handling that have broken due to fatigue failure, as we have studied so far? Please pay attention to where the starting point of fatigue cracks is. Usually, don't they start from places like keyways, oil holes, threads, abrupt changes in cross-section, or welds? *You can view the detailed content of the article in the PDF. For more information, please feel free to contact us.

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The importance of corrosion treatment and surface strengthening to enhance the durability of springs.

The importance of corrosion treatment and surface strengthening to enhance the durability of springs.

[Reproduction of Private Spring Preparatory School Lecture 23] Explanation of methods to prevent the decline of fatigue strength and surface treatments aimed at corrosion protection!

In recent discussions, we have explained the factors that lead to a decrease in fatigue strength. However, as the saying goes, "If you think you will lose, you will lose." Therefore, while we won't call it a surefire method, let's study ways to prevent the decline in fatigue strength. To improve fatigue strength, the first consideration is surface enhancement. As previously mentioned, this includes cleaning the surface and preventing decarburization, but there are also other effective measures such as corrosion protection and shot peening for springs. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.*

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The effects and precautions of shot peening in improving the fatigue strength of spring materials.

The effects and precautions of shot peening in improving the fatigue strength of spring materials.

[Reproduction of Private Spring Preparatory School Lecture 24] An explanation of the miracle cure for improving fatigue resistance, shot peening, and other important considerations!

Today, let's study shot peening, a remedy for improving fatigue strength, as a way to wrap things up, along with other important points. Shot peening involves bombarding the surface of a spring with small steel balls at high speed using compressed air or centrifugal force to strengthen that surface. The effects of this strengthening can primarily be considered as follows: A. Blowing away surface scale and decarburization layers, thereby reducing a type of notch. B. Generating effective residual stress on the surface. C. Work hardening the surface. D. Creating a uniform roughness on the surface. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.

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The importance of changes in steel transformation and organizational structure, and hardness adjustment through heat treatment.

The importance of changes in steel transformation and organizational structure, and hardness adjustment through heat treatment.

[Reproduction Private Spring Preparatory School Lecture 28] We are explaining using a diagram that shows the carbon content and the proportion of organizational components in steel!

As a policy of our preparatory school, we aim to make our lectures as easy as possible while ensuring the content is rich and profound. However, for a while, I believe we will continue with some difficult explanations. Please study with the same enthusiasm as a wife reading a cookbook. Now, phase transformation occurs at temperatures above 700 degrees, but first, let's examine the structure of steel at room temperature. *For detailed content, you can view the PDF. For more information, please feel free to contact us.*

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Explanation of the temperature changes due to the steel transformation process and the influence of carbon.

Explanation of the temperature changes due to the steel transformation process and the influence of carbon.

[Reproduction of Private Spring Preparatory School Lecture 29] Pure iron at room temperature undergoes a sudden transformation into gamma iron when the temperature rises to 910 degrees!

Last time, I briefly explained "Steel H," but today I will finally get serious and talk about perversion. As we learned previously, steel is an alloy of iron and carbon, and the strength and structure of steel change depending on the carbon content. However, it also varies with temperature, and the stable state is represented by a "phase diagram." *For detailed content of the article, you can view it in the PDF. Please feel free to contact us for more information.*

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Detailed explanation of dimensional changes due to quenching and tempering, and heat treatment techniques.

Detailed explanation of dimensional changes due to quenching and tempering, and heat treatment techniques.

[Reproduction of Private Spring Preparatory School Lecture 32] Explanation of the relationship between temperature and elongation when heated slowly and cooled slowly!

I have been studying quenching and tempering lately, so please bear with me a little longer. ■ Expands to the point of rapid cooling I have lectured on the changes in structure caused by quenching and tempering, but today I would like to talk a bit about changes in dimensions. * For detailed content of the article, you can view it in the PDF. Please feel free to contact us for more information.

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Causes of defects due to heat treatment and preventive measures: countermeasures for overheating, quenching, and cracking.

Causes of defects due to heat treatment and preventive measures: countermeasures for overheating, quenching, and cracking.

[Reprint Private Spring Preparatory School Lecture 33] What you need to be careful about is overheating! An introduction to defects that are likely to occur during heat treatment.

Today, in the sense of a final review, let's study the defects that are likely to occur during heat treatment. The first thing to be cautious about is overheating. This occurs when steel is unnecessarily heated to a temperature above the specified level, which not only damages the fuel but also accelerates the wear of the furnace. Overheated materials are prone to decarburization, oxidation, and grain coarsening, leading to cracking and making the mechanical properties more brittle. In the heat treatment of springs, there is also a chance of overheating during shaping and quenching heating. How can we prevent this? *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.*

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Introduction to types of spring steel wire, their applications, and the production process.

Introduction to types of spring steel wire, their applications, and the production process.

[Reproduction of Private Spring Preparatory School Lecture 34] Introduction to soft steel wire, hard steel wire, piano wire, and welding rod core wire!

Now that the new students have arrived, we will temporarily pause our studies on heat treatment and start with materials for springs, beginning with steel wire. I feel sorry for the new students, but if any unfamiliar terms come up during the lecture, please ask the seniors from the second-year repeaters for help. It’s fine to jump straight into spring steel wire, but remember the saying, "Spring days are long, and haste makes waste." I will digress a bit, but it would be beneficial to introduce the various types of wires, as it will help in understanding spring steel wire. *For detailed content, please refer to the PDF. For more information, feel free to contact us.*

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The relationship between the quality and surface defects of spring steel wire and its price.

The relationship between the quality and surface defects of spring steel wire and its price.

[Reproduction Private Spring Preparatory School Lecture 38] Make sure to check that there are differences in price depending on the type of line and the line diameter!

Last time, I lectured on the manufacturing process of spring steel wire. We studied how more effort is put into removing surface defects for higher quality wires. Today, I will discuss how this affects the surface defects of the wire and how it reflects on the price. First, looking at the raw material wire, the higher the carbon content, the more expensive it is. For example, if the price of high carbon steel wire type 6 is set at 100, then that of high carbon steel wire type 4 is 87. *For detailed content of the article, please refer to the PDF. For more information, feel free to contact us.*

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Quality and tensile strength of spring steel wire and changes in coil diameter.

Quality and tensile strength of spring steel wire and changes in coil diameter.

[Reproduction of Private Spring Preparatory School Lecture 39] An explanation of how the tensile strength of spring steel wire significantly affects coiling!

I also assigned this as homework, but did you understand the differences in quality and performance among various types of spring steel wire? Today, let's try making springs with steel wire. Oh, excuse me, you all are better at spring manufacturing than I am. I would like to learn from you, so let's skip that. By the way, why do the springs made from spring steel wire fit precisely into certain dimensions and specific spring characteristics? *For detailed content, you can view it in the PDF. Please feel free to contact us for more information.*

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