Spring index = 2.0, it is a high difficulty machining.
The material used is "oil-tempered wire made of silicone chrome steel for spring applications, SWOSC-V." The material with a wire diameter of Φ3.8 is wound with an average coil diameter of Φ7.7mm. This is a processing task with a spring index of 2.0, which is quite challenging. The spring index is the value obtained by dividing the average coil diameter by the wire diameter, serving as a guideline for the difficulty of processing the spring. According to JIS standards, a spring index of "4 or more and 22 or less" is desirable. It is also referred to as spring index = D/d (Deviate). In the case of this spring, when the spring index is 4 or less, the coil diameter is small, making it tight and difficult to wind. Conversely, when the spring index exceeds 22, the coil diameter is large, resulting in a fluffy and unstable winding. That's the general idea. Our company processes springs with a spring index of less than 4 as well as those exceeding 22. Of course, there are limits. The limit values for the spring index vary depending on the material and wire thickness, so please consult us if you have any concerns. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. for springs We also support web conferences.
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Company information
Tsuruga Spring Co., Ltd. is a spring manufacturer located in Tsuruoka City, Yamagata Prefecture. We specialize in the design and manufacturing of coil springs, as well as wire forming processing. 1) Our strength lies in our ability to respond quickly from design to prototyping. Are you facing issues such as springs breaking, deforming, or being weak? Our technical staff will respond carefully, so please feel free to consult with us. It's okay even if you don't have drawings. 2) We can accommodate a wide range of wire thicknesses from 0.1mm to 10.0mm. We stock piano wire, stainless steel wire for springs, oil-tempered wire, and phosphor bronze wire. We can also handle special spring materials that are outside JIS standards, such as Herculite and SWIC. Additionally, we can accommodate wire diameters exceeding 10mm through outsourcing. 3) We accept orders from one piece to tens of thousands of pieces. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com Tsuruga Spring Co., Ltd. 〒997-0011 3-10-25 Takarada, Tsuruoka City, Yamagata Prefecture
