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Features of Scrowave Springs

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When you hire coil springs, have you ever had trouble such as free height was too high or the product is too big? If you hire Scrowave Springs, you can control free height and save a lot of space for design.

  • Scrowave Springs can generate equal load in comparison with compression coil spring with 50% of height.
  • We can support various springs by combining the number of mountains and turns.
  • It is coiled and molded with rounded wire rod, unlike pressed products, so burr and undercut never appear.
  • You don't have to produce any new mold or jig even in the case of custom made.
  • You can choose general carbon steel and stainless steel resisting rust.

Design of Scrowave Springs

Calculation of spring constant

K=W/V
V=(W・f・Dm^3・Z)/(E・b・t^3・N^4)・(ID/OD)

The spring characteristic of Scrowave Springs is non-linear, but around 60% of center of all bends area is similar to linear. So they almost correspond this domain.

Calculation of stress

σ=(3・π・W・Dm)/(4・b・t^2・N^2)
Calculation of stress
K : Spring constant(N/mm)
V : Bend(mm)
W : Load(N)
OD : Outer diameter of ring(mm)
ID : Inside diameter of ring(mm)
Dm :Circle diameter of ring(mm)
f : Correction factor
Z : Shape factor
E :Young's modulus(MPa)
b : Width of material(mm)
t : Thickness of material(mm)
N : The number of mountains
σ : Stress(MPa)
Correction factor ( f )
N=2~4 f=3.88
N=4.5~6.5 f=2.9
N=7~9.5 f=2.3
N=10~ f=2.13
Shape factor ( Z )
V・OV Series Z=1
2V Series Z=1/reel
W Series Z=reel

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Scrowave Springs lineup

W Series
Multi turn type

Wタイプ

w series are suitable for the need of big free length and deflection.Compare with V type, spring constant is set low.We can produce from approximately inner diameter 5 to outer diameter 500.

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Virtual 3D

V Series
Single turn gap type

Wタイプ

V series are suitable for the need of small deflection and big load.Compare with W type, spring constant is set high.We can produce from approximately inner diameter 5 to outer diameter 500.

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Virtual 3D

OV Series
Single coiled Type

OVタイプ

Form of V series is overlaid both ends of V type.
It is suitable for the need of big load and small deflection.We can produce from approximately inner diameter 5 to outer diameter 500.

Virtual 3D

2V Series
Parallel double coiled Type

2Vタイプ

2V series are suitable for the need of spring constant.It is form of double winding of V type.
We can produce from approximately inner diameter 5 to outer diameter 500.

Virtual 3D

Bearing preload spring

ove

Bearing spring makes bearing stable by giving it constant pressure.
We can produce many size of product following the size of Bearing.
The form is the same as V and OV type.

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Application example of our product

In-vehicle camera

If you hire short Scrowave Springs in the miniature camera which has small space, you can adjust the focus of the lens easily and can improve efficiency of the assembly operation.

Cable connector

The strong counter force and the equal pressurization on the circumference of Scrowave Springs enable reliable latch locking mechanism in the limited space and connect.

Floating connector

The compression coil spring was used before, but can shorten full length by using Scrowave Springs and succeed in downsizing.

Mechanical seal

It is application example of mechanical seals such as pumps. The compression coil spring is often used, but can shorten full length by using Scrowave Springs.

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