By eliminating the grinding process on both ends, cost reduction can be expected.
When the wire diameter of a compression spring is thick, the ends of the spring are ground flat. Grinding is also referred to as polishing. The purpose of grinding is to improve the seating of the spring. Now, regarding the wire diameter at which grinding is performed, it is not actually specified in the JIS standards. Many spring-related publications suggest that grinding is done for wire diameters of 0.5mm or more. If grinding is not performed, the price of the spring will be lower. Therefore, if there are no issues with usage, I recommend considering "no grinding" even for wire diameters of 0.5mm or more. As a guideline, if the wire diameter is 2.0mm or less and the spring index (the value obtained by dividing the average coil diameter by the wire diameter) is 13 or more, it is considered that the spring can be used without grinding and still have good seating. For this spring, the wire diameter is 2.0mm, the average coil diameter is 28mm, and the spring index is 14. How does that look? The spring on the left in the photo has good seating visually, and the perpendicularity meets JIS Class 2 (approximately 2.9 degrees) and is kept below 2 degrees. If you have any questions about "grinding" for compression springs, please feel free to consult us. We can also accommodate prototype assessments with a short lead time.
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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 conferencing.
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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
![Significantly reduce dressing frequency - Grinding and polishing [HPR Dressing]](https://image.mono.ipros.com/public/product/image/afa/2000583515/IPROS36525715135776868511.png?w=280&h=280)
![[Column] The Difference Between Grinding and Polishing](https://image.mono.ipros.com/public/product/image/d52/2000897887/IPROS04284198844089121995.png?w=280&h=280)
