The outer diameter of the coil is managed with a tolerance of JIS standard grade 1 or higher.
The material used is "Piano Wire Type A, SWP-A," with a wire diameter of Φ1.2. It has a shape similar to a compression spring, but it is a torsion spring that is used by hooking the inner protrusions and twisting in the direction of winding the spring. The springs are formed using a multi-forming machine, and the allowable tolerance for the coil outer diameter of Φ16mm is managed with a precision of "±0.1mm," which is above JIS standard grade 1. (The allowable tolerance for JIS standard grade 1 is ±0.2mm.) The surface treatment is "trivalent chromate plating." If you have any issues with springs, please feel free to consult us. Our technical staff will respond carefully. Tsuruoka Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com We also support web meetings.
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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