TUR/151
WTO/TBT
TR Türkei
  • 73 - Waren aus Gusseisen, Eisen oder Stahl
2019-09-15
2019-07-18

Springs - Quality Requirements - Cylindrical Helical Compression Springs; Springs and leaves for springs, of iron or steel (HS 7320)

Communiqué On TS 1441-1 "Springs - Quality Requirements - Cylindrical Helical Compression Springs - Part 1: Made From Round Wire And Rods, Hot Formed" and TS 1441-2 "Cylindrical Coil Compression Springs Made From Round Rods - Part 2 : Quality Requirements For Mass Production" (3 page(s), in English)

This standard; covers the characteristics of hot-formed cylindrical-helical compression springs from circular bar in description, classification and specifications, sampling, inspection and testing, and based on market supply. The permissible deviations specified in this standard apply to helical compression springs that meet the following requirements:

-           Party size up to 5000 pieces 

 -          Rod or wire diameter,  d 8 mm to 60 mm 

 -          External coil diameter, De ≤  460 mm 

 -          Unloaded spring length, L0 ≤ 800 mm 

 -          Number of active turns , n ≥ 3 

 -          Turns in rate, w 3 to 12

In cases where the party size is 5000 pieces or more, TS 1441-2 is applied. This standard covers the description and testing of  cylindrical helical compression springs made of round bar. Springs covered by this standard are mainly used in vehicle suspensions.Vehicle suspension springs are generally manufactured in large scale and in automatic production lines. Therefore, manufacturing tolerances are narrower than TS 1441-1. The permissible deviations specified in this standard, cylindrical helical compression, which meet the following requirements:

-           Mass production At least 5000 pieces

-           Rod length, l, up to 4300 mm

-           Rod diameter, d 9 mm to 18 mm

-           Unloaded spring length L0 (free length) up to 600 mm

-           External coil diameter, up to 180 mm

-           Number of active turns n from 5 to 12

-           Turn index, w 6 to 12

-           Total spring deflection sc 180 mm and more 

-           In cases where the group size is 5000 pieces or more, TS 1441-2 is applied.