T/ZJGS 26-2025 Locking Hardware Accessory Technical Specification Part 6: Compression Spring

Scope

Main Technical Content: 5.1 Material Products shall be manufactured in accordance with the approved drawings and technical documents specified in the relevant procedures. 5.1.1 Material Selection Springs are generally made from the materials specified in Table 1. If other materials are required, they shall be agreed upon by both the supplier and the purchaser. **Table 1: Classification of Springs and Common Material Specifications** **Serial Number** **Spring Type** **Common Material Grades and Standards** 1 Copper springs H62, QSn6.5-0.1 GB/T 4357 2 Carbon steel springs 70#, 72A GB/T 21652 3 Stainless steel springs 06Cr19Ni10 GB/T 2458 5.1.2 Quality of Spring Materials The quality of spring materials shall comply with the corresponding standards and be accompanied by a quality certificate provided by the manufacturer or supplier. 5.2 Dimensional Parameters 5.2.1 Spring Diameter The diameter of the spring and its tolerance limits shall comply with Table 2. **Table 2: Dimensional Tolerances for Springs (mm)** **Diameter (D)** **Tolerance Limits (D)** D≤33 D≥55 5.2.2 Free Length of Springs The free length of the spring and its tolerance limits shall comply with Table 3. **Table 3: Free Length Tolerances for Springs (mm)** **Free Length (H0)** **Tolerance Limits (H0)** H0≤10 H0≥15 5.2.3 Total Number of Coils, Effective Coils, and Tightening Coils The ends of the springs shall be tightened, and the number of tightening coils on a single end shall be controlled within the range of (1.5–3) coils. The tolerance limits for the total number of coils and effective coils shall comply with Table 4. **Table 4: Tolerance Limits for Total and Effective Coils (coils)** **Total Coils (n1)** **Effective Coils (n)** Tolerance Limits (n1, n) n1≤10 ± 0.50 n1≥20 ± 1.00 5.2.4 Compression Length of Springs The compression length of the springs shall comply with the requirements of the drawings

Development Information

Related Standards