Custom Coil Springs

Machined Sample production parts in as fast as 3 days. Request an online quote today.

Certifications ISO 9001:2015 | ISO 14001:2015

What can a spring machine do?

The CNC spring machine mainly controls multi axis linkage through the CNC system to achieve precise wire forming By using G-code and specialized programming software to set parameters such as the number of coils, diameter, and pitch of the spring, control the coordinated movement of multiple axes such as the feeding shaft, forming shaft, and cutting shaft. And using servo motors to drive feeding rollers, forming molds, and cutting tools, plastic deformation is carried out on metal wires (such as carbon steel, stainless steel, alloy steel wire, etc.).

Springs Machining
Capabilities

Advanced and precise manufacturing technology enables errors to be minimized and stabilised as much as possible.

Dimensional Tolerance

Geometric Tolerance

Performance tolerance

	Ordinary	Precision
Wire Diameter	±0.02mm ~ ±0.05mm	±0.01mm (Such as springs for medical devices or electronic equipment)
Outer Diameter	±1% ~ ±2%	±0.5% （Such as small springs manufactured by CNC spring coiling machines）
Free Length	±1% ~ ±3%	±2% ~ ±5%

● Total Coils: General tolerance: ±0.5 turns to ±1 turn
● Pitch: Compression spring: ±5% to ±10%
● Perpendicularity: The perpendicularity of the O-end face to the axis: ≤1°; (For high-precision springs, the requirement is ≤0.5°)

● Load
o General-purpose springs: ±5% to ±10% (such as the force value of a compression spring under a specified deformation)
o High-precision springs: ±2% to ±3% (such as automotive valve springs)
● Spring Rate
o General requirement: ±5% to ±8%
o Precision applications: ±3% (such as aerospace springs)

Typical Tolerance Ranges of
Different Spring Types

Compression Springs

Tension Springs

Torsion Springs

	Ordinary	Precision	High precision
Free length	±2%	±1%	±0.5%
Outer diameter	±2%	±1%	±0.5%
Load (specified height)	±10%	±5%	±2%

	Ordinary	Precision
Free length	±3%	±1.5%
Outer diameter	±1mm	±0.5mm
Load (specified height)	±20%	±10%

	Tolerance Range
Torque (specified Angle)	±10% ~ ±15%
Arm length	±1mm ~ ±2mm
Angle reset deviation	≤5°

Springs Detection Equipment

High-precision image measurement

instrument

● Precise Measurement, Down to the Last Detail
● Time and Labour Saving, Fully Automated
● Complex Shapes, Instantly Measured

Coil Spring Tester

●

Deformation and rebound analysis

Surface Finish
and Post
Processing Options

Shengyi Intelligent Technology

offers a variety of spring surface processing options to meet your

spring requirements

. For example:

environmentally friendly coatings

grinding

electroplating

, etc.
●

There are shallow marks or small pits on the surface of the spring

●

The surface of the spring is not bright enough and has oil stains

●

Some springs have special application paths, such as anti-corrosion or electrical conductivity

Why Choose Shengyi for Custom Springs?

Can I manufacture in large quantities even if I only have samples but no drawings?

Sure. You just need to tell us its specific size and we can print out the sample. But it would be best if you have samples and mail them to us. We will conduct measurements and tests.
How to shorten coil springs?

Shortening the spring is actually very simple. However, if you want to shorten the spring while still achieving its original function, it is rather difficult.
How long does coil springs last?

The lifespan of a spring is determined by its material, design and frequency of use. For instance, to ensure that outdoor springs do not rust, we need to protect them through some surface treatments.
In what aspects are springs usually applied?

Springs are actually everywhere in life. You can see him in the ballpoint pen around you, in the car, and even in aerospace.