ColdWound

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
Classification	Standards No.	Symbol	Univerlectro	Electric Conduction	Non-Magnetic	Heat Resis tance	Corrosion Resis tance	Fatigue Resis tance	Remark
Hard Drawn Steel Wire	KS D 3510	hSW2	O
Hard Drawn Steel Wire	KS D 3510	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
Designation of spring features	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