Compression spring

1. wire diameter as below:
   0.1mm – 3.0mm wire
   3.1mm – 12mm wire
   12.1mm – 65mm wire
2. ISO9001:2000 certified
3. Competitive price and fast delivery
4. These springs are manufactured by fully automatic spring making machine,low cost

Compression springs

Description of parameters for Compression spring

Description of parameters for Compression springs

Compression Spring Physical parameters

d (wire diameter): This parameter describes the diameter of wire used as material for spring.
S (shaft): This parameter describes the maximum diameter of spring shaft in industrial applications. Tolerance for this parameter is (+-)2%(indicative).
Di (internal diameter): Internal diameter of a spring can be calculated by subtracting the doubled wire diameter from the external diameter of a spring. Tolerance for this parameter is (+-)2%(indicative).
De (external diameter): External diameter of a spring can be calculated by adding the doubled wire diameter to the internal diameter of a spring. Tolerance for this parameter is (+-)2%(indicative).
H (hole): This is the minimum diameter of the hole in which spring can work. Tolerance for this parameter is (+-)2%(indicative).
P (pitch): Average distance between two subsequent active coils of a spring. Tolerance for this parameter is (+-)2%(indicative).
Ln (block length): Maximal length of a spring after total blocking. This parameter is shown in the picture on right. Tolerance for this parameter is (+-)15%(indicative).
L0 (free length): Free length of compression springs is measured in its uncompressed state after previous one time blocking. Tolerance for this parameter is (+-)2%(indicative).
Nr of coils: This is a total number of coils in a spring - in the picture above it is equal to six. To calculate number of active coils substract two terminating coils from total number of coils.
R (spring rate): This parameter determines spring's resistance, while it is working. It is measured in 1 DaN/mm = 10 N/mm. Tolerance for this parameter is (+-)15%(indicative).
L1 & F1 (length at force F): Force F1 at length L1 can be calculated from equation : F1 = (L0-L1) * R. Equation derrived from previous for calculating L1 : L1 = L0 - F1/R.
Grinding: Defines whether or not the ends of a spring are ground.

Compression Spring Materials

A (Music Wire): Steel that conforms to the DIN 172233 class C1 standard.
I (Inox steel): Inox 18/8 mark Z10 CN 18.09.
N (Zn coated wire): Zinc coated wire for springs
S (Cr-Si Steel): Cr-Si Steel. Springs created from this material have better endurance and spring rate. These parts will be available from 2005-03-01

Compression Spring Tolerances

Ends: All compression springs have flat ends.
Spring rate: Tolerance for spring rate is (+-)15%(indicative).

Xiamen Shuangyuan Springs Co., Ltd copy right @2006-2008
Address: Defenghang Industrial Zone, Dongfu Town, Haicang District , Xiamen Fujian, P.R.China
Tel: +86(592)5254186 +86(592)5289710 Fax: +86(592)5513310
Email: shuangyuan@springinchina.com  rosecn888@gmail.com