Hex Socket Head Cap Bolt (Fine Threaded Screw) SNS for Use with Precision Equipment

Question: THA Test FAQ area 01: How long is the life of a basic round wire coil spring?

Answer: Answer : Unfortunately, there are no specific test values as reference regarding the life of a round wire coil spring because there is individual difference to a certain extent and the installation conditions are complicated.The usage count varies with the operating temperature, environment, and amount of deformation. To increase the usage count, it is recommended to use the spring up to 70% of the allowable displacement Fmax..

Question: THA Test FAQ area 02:What are the JIS standards for general spring-related materials?

Answer: Piano wires: JIS G 3522Iron wires: JIS G 3532Hard drawn steel wires: JIS G 3521Stainless steel wires for springs: JIS G 4313

Question: THA Test FAQ area 03:What influence will the usage without a spring rail have on the spring?

Answer: The usage without a spring rail will cause buckling of the spring, bending of its body and other problems, leading to breakage due to high stress locally generated on the inner side of the bending part. To ensure the service life of the spring, install the spring using the shaft, outer diameter guide rail, etc.※Basically, it is ideal to use the spring on the intermediate shaft of the inner diameter side guide rail, passing it through from the upper surface to the lower surface.

Question: THA Test FAQ area 04:What influence will the usage count of more than 300,000 times beyond the maximum displacement (when used close to the solid length) have on the spring?

Answer: The usage count of more than 300,000 times beyond the maximum displacement (when used close to the solid length) will cause high stress breakage above the calculated value on the section. In addition, near the solid length, the effective coil part will gradually get close and the spring constant will increase. Therefore, be sure to use within the allowable displacement Fmax.(mm).

Question: THA Test FAQ area 05: ทดสอบคำถามภาษาไทยฝั่ง language = EN

Answer: คำตอบภาษาไทย language = EN

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