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Pull Spring Meshes C	Pull Spring Meches Cross	Pull Spring Meshes S


Press Spring	Torsional Spring

Dz - external diameter. External diameter of a spring can be calculated by adding two diameters of a wire to the internal diameter of a spring.
Dp - divisional diameter. Divisional diameter can be calculated by deducting diameter of a wire from the external diameter of a wire.
Dw - internal diameter. Internal diameter of a wire can be calculated by deducting two diameters of a wire from the external diameter of a wire.
L0 - length of a spring in a free state (without ballast).
d - diameter of a wire from which spring is made.

Following parameters concern only press springs:

h=s - pitch of a press spring (notations can be used inchangeably). Average distance between following active spring coils.
Z - quantity of complete coils.
Zc - quantity of active coils.
Z = Zc + 2 coils (for burnish)
Lc (blocking) - maximal length of a spring, after total blocking.

Tips of the press springs:
- not burnished, not grinded coils
- not burnished, grinded coils
- burnished, not grinded coils
- burnished, grinded coils

Examples of situations which show how press spring works:
A) Spring works on a bolt - the internal diameter of a spring Dw HAS TO BE BIGGER THAN DIAMETER OF A BOLT ON WHICH IT WORKS.
B) Spring works in a hole - then external diameter of a spring Dz HAS TO BE SMALLER THAN DIAMETER OF A HOLE SEAT..

If a spring is endangered for moisture activity (possibility of a fast corrosion in case of an ordinary wire-black), then we advice to use stainless steel.

If a spring has a contact with food, then stainless and acid-proof steel should be used.