custom Extension Spring

HSPR is a professional extension spring manufacturer. We design and manufacture millions every year for custom specifications. Tension springs, also known as extension springs and expansion springs. When the external force begins to act, the spring begins to undergo elastic deformation, and the amount of deformation gradually increases with the increase of the external force. In the process, the spring stores energy. Then, when the external force disappears or decreases, the spring begins to regain its original shape while releasing the stored energy, creating a restorative force. This restorative force can be used to drive other components in the mechanism to achieve a specific function.

In addition, it is worth noting that the stretched spring usually has a certain initial tension, even in the absence of external force, the spring will maintain a certain degree of tightness. This initial tension determines the shape and characteristics of the spring when it is not under load.

Spring Shape: According to drawings or samples
Wire Shape:Round,square,rectangle or other Shaped wire
Wire Diameter:0.03mm to 60mm
Material:High carbon steel, stainless steel, alloy steel, copper alloy, nickel alloy
Ends:English loop, German loop, Side loop, Extended ends, Half loop, Doulble loop, Coned End with Swivel Hook, Inclined lateral loop, V hook, square end hook, no loop, other Special hook
Special Requirements:High temperature, corrosion resistance, rust resistance
Surface Treatment:Zinc Plating，Black Oxide，Gold Irridite，Plating (Zinc, Nickel, Silver, Tin & Gold Electroplating)，Passivation，Powder Coating & Color Coding，Rubber
Production Process:Review drawings, prepare raw material, spring winding, heat treatment, surface treatment (passivation, shot peening, inspection), finished product inspection, packaging and storage
Test:Size, Mechanical property, Fatigue performance

HSPR Springs

Types of Extension Springs

Machine loop or hook(English loop)

Crossover loop or hook(German loop)

side loop Extension Springs

Extended ends Extension Springs

half loop Extension Springs

doulble loop Extension Springs

Coned End with Swivel Hook

Inclined lateral loop

V hook Extension Springs

square end hook Extension Springs

no loop Extension Springs

other Special hook

material

The selection of raw materials for extension springs is diverse, mainly according to the specific use of the spring, working environment, strength requirements, corrosion resistance and other factors are comprehensively considered.

Carbon spring steel wire

It has good mechanical properties and is an ideal material for making springs with high strength.
The elastic limit is low.

alloy steel spring wire

Alloy steel springs have high strength and corrosion resistance and are suitable for high strength and high temperature environments.
Many types, such as chromium molybdenum steel, manganese steel and so on

stainless steel spring wire

It has high corrosion resistance and can be used for a long time.
It is widely used in chemical, aerospace, medical and other fields.

Copper spring wire

Copper springs have better electrical conductivity, thermal conductivity and corrosion resistance, but the strength is low
It is usually used for occasions that require softness and elasticity, such as electronic products, clocks and so on.

steel wire

High elastic modulus and high yield limit, can withstand large loads and deformation, and not easy to deformation.
Good corrosion resistance and wear resistance.

Specific types of stainless steel wire:

Such as strengthened stainless steel wire, lead bath and other warm cold drawing steel wire and oil heat treatment quenched stainless steel wire.
These steel wires have higher compressive strength and excellent process properties, and their fatigue characteristics are higher than those of ordinary heat-treated hardened stainless steel wires.

Custom parameter

Provide the necessary parameter information of the spring

Wire Diameter
Outer Diameter
Free Length
Total Coils

Provide technical requirements for springs

Spring Winding Direction(Left Hand, Right Hand)
Materials (Spring Material Requirements)
Surface Treatment (Galvanizing/Blackening/Nickel Plating/Electrophoresis/Spray Painting)
Strength Requirements (Elastic Properties)
Ends(English loop, German loop, Side loop, Extended ends.etc )

Our advantage

Using high quality raw materials, strong and easy to use.
The extension spring is forged through multiple processes, and each production process is strictly controlled. The surface is smooth and burr free.
Extensiong spring surface without trachoma and black spots, fine details, good texture, easy to improve work efficiency.
37 years of production experience, can provide various industry solutions.
We have professional testing laboratories to ensure product quality.
Passed ISO 9001, IATF16949 quality system certification
Quick response and delivery.
Strict quality management system.
Perfect after-sales system.