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ColdWound

COLD WOUND COIL SPRING

Feature

Cold Wound Coil Spring uses materials with 0.1mm-10mm diameter, In general, the shape of the materials is round section, but for special purposes, there are nonlinear sectional spring that is used for the engine valves of autos recently, and square sectional spring. Coiling on the cylinder-shape is most common, but for special purposes, there are ping tail end spring in which the diameter of the left part coil is minimized, cylinder-shaped spring, cone-shaped spring, and double-headed drum type spring. In case of tension coil spring, the loop of the spring and the end of the loop are various in terms of the shape

Usage

For the engine valves of autos, vehicles, industrial equipment, control valves, pipe hangers, dustproof devices, electronic equipment requiring small springs, etc.

Cold coil spring materials
Classification Standards No. Symbol Usage (Reference) Remark
Univerlectro Electric Conduction Non-Magnetic Heat Resis tance Corrosion Resis tance Fatigue Resis tance
Hard Drawn
Steel Wire
KS D 3510 hSW2 O
hSW3
Steel Music Wire KS D 3556 PW O O
Spring Carbon
Steel Oil -
Tempered Wire
KS D 3579 SWO O
Carbon Steel
Oil-Tempered
Wire for
Valve Spring
KS D 3580 SWO-V O O
Chrome
Vanadium Steel
Oil-Tempered
Wire for
Valve Spring
KS D 3581 SWOCV-V O O O
Spring Steel
Oil-Tempered
Wire for
Valve Spring
KS D 3582 SWOSC-V O O O
Spring
Stainless
Steel Wire
KS D 3535 STS 302 O O O
STS 304 O O O
STS 306 O O O
STS 631 J1 O O O
Brass Wire KS D 5130 C2600 W-H O O O
C2600 W-EH
C2700 W-H
C2600 W-EH O O O
C2800 W-H
Nickel
Silver Wire
KS D 5102 C7521 W-H O O O
C7541 W-H O O O
C7701 W-H O O O
Copper Wire C5101 W-H O
C5191 W-H O
C5122 W-H O
Betilrum
Copper Wire
C1720 W-H O
Specification
Record of specification in ordering helical extension spring
Classification Special Requirements Remarks
Material in use Choose the material based on the manufacturer'
sstandards unless specified otherwise
Diameter of the
mm material (d)
mm
Mean diameter of coil (Dm) mm The tolerance is managed through management
of the outer diameter
Outer diameter of coil (Do) mm Management of the outer diameter tolerance is required
depending on the conditions for use
Length of the coil to be wound (Ch) mm Shall be based on the reference value
Total no, of coils (turns) (Nt) Vol Shall be based on the reference value, and regulate
the management through discussion with users
Free height (Fh) mm Shall be based on the reference value in case there
is a designation of load management
Rolling direction Right side
Designation of spring features Height Load Shall be based on the manufacturer's reference value
in case there is no designated height and load
mm kgf
Spring constant kgf/mm
Shape of coil end Round loop The shape of the loop should be recorded.
Surface management after molding Shot peening
Surface treatment Treatment with rust preventive oil is possible upon request
Use or conditions for use Record of Use Condition Indicate use, temperature in use,
humidity and environment for use
Other specifications applicable KS B2402, KS B2403