Tension spring, plate hook, measures against breakage and deformation.

It has a hook shape that is strong against bending and deformation.

The hooks of tension springs are typically formed by raising one coil at each end of the spring. When a load is applied to the tension spring, stress (load) tends to concentrate at the base and inside of this hook, so issues such as breakage or deformation mostly occur starting from the hook. The spring equipped with a plate hook, as shown in the photo, covers this "weakness" of tension springs. Although it incurs additional costs for manufacturing the separate plate, it can reduce stress concentration on the hook, making it a hook shape that is resistant to breakage and deformation. This hook shape is referred to as a "screw-in hook" in JIS standards. Additionally, the "tapered round hook," which incorporates a round wire hook inside the spring, is also a hook shape that is strong against breakage and deformation. (For more information about the tapered round hook, please refer to the related links below.) If you are experiencing issues with spring troubles such as breakage or deformation, please feel free to consult us. If you send us broken samples, we will propose improvement measures. Tsuruga Spring Co., Ltd. Technical Contact: Ujiie Phone: 0235-22-0407 FAX: 0235-22-0546 Email: web@tohj.com

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