Constant Force Spring
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Constant Force Spring

Constant force spring is a special tension spring. They consist of helical metal plates that are bent on the inside so that each coil is tightly wound around the inside of the metal plate. When the metal plate is stretched (twisted), the internal stresses resist the load force, which is exactly the same as that of a normal stretch spring, but the coefficient is close to constant (zero).

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Product Description

Constant Force Spring


1.Product Introduction of the Constant force spring


Constant force spring is suitable for high tension, load does not increase occasions. In use, the inner diameter is usually used to wrap the spring tightly around the drum, with the free end attached to the load, like a counterweight. But it can also be done the other way around, with the free end fixed and the spring itself providing the working force, as in electrical equipment. Constant force springs can produce considerable elasticity because the load capacity can be multiplied if two or more springs are connected back to back or in series. Compared with ordinary compression spring or tension spring, the elastic force is very constant, and can output almost linear elastic force, to ensure that the product will not change due to the change of elastic force in the process of use. In the long and narrow space, the space can be reduced as much as possible, increasing the possibility of product aesthetic design.   



Usually, the outside diameter value of constant force spring is set according to the installation space. Sometimes, when using intermediate shafts, the inside diameter value must also be considered. The general outer diameter of constant force spring can not be greater than the installation space, otherwise it will produce friction effect. Our company has an independent factory site with the building area of 27000 square meters, the land area of more than 14300 square meters. Product testing equipment is complete, with nano electron accelerator, injection moulding machine, rubber molding machine and other production and manufacturing equipment. Also it has high pressure screening test center, fully meet the needs of product inspection and testing.



Our products, including Constant force spring, have passed ISO9001: 2015 quality management system, ISO14001 environmental management system and OHSAS18001 occupational health and safety management system and the national production safety standardization certification, full implementation "6S" production management system, realize products zero defect, dedicated to provide customers with stable quality, reliable performance and high added value high quality products.


2.Product Parameter (Specification) of the Constant force spring


Technical Specification

Test Item

Parameters

Hardness (Shaw A)

90

Tensile Strength (MPa)

≥12

Elongation at Break (%)

≥400

Volume Resistivity (Ω.cm)

≥1*1014

Breakdown Strength (kV/mm)

≥25

Permittivity (ε)

<2.5

Shrinkage Temperature (℃)

120~140

Radial Shrinkage Ratio (%)

250

Length Shrinkage Ratio (%)

±5

Oxygen Index (OI)

≥27


Constant force spring material is SUS301 series. The material has the advantages of high hardness, high tensile strength, smooth surface, good rust resistance and easy processing. Makes this material almost ideal for constant force springs. The hardness can reach about Hv600 (after low temperature heat treatment), the tensile strength can reach more than 1665Mpa, the nickel content is between 6.0 and 8.0, in order to ensure its good anti-rust performance.


3.Product Feature And Application of the Constant force spring


As for the features and application about the Constant force spring, If the use of the environment is harsh, in ultra-high temperature or ultra-low temperature environment, you can also choose SJ101 series wide temperature high strength constant elastic alloy, in high temperature to maintain high strength, constant elasticity and low expansion coefficient. However, its materials are expensive and are not usually used.
The two most important properties are elasticity and life. Generally speaking, the thicker the elastic material, the wider the width, the higher the elasticity. In a material of the same size, the smaller the inner diameter of curl, the greater the elasticity, and vice versa. Under the same production conditions, the thinner the material, the longer the service life. In materials of the same size, the smaller the inner diameter of the curl, the shorter the service life, and vice versa.

4.Product Details of the Constant force spring


The Details of the Constant force spring 


5.Product Qualification of the Constant force spring


The production of heat-shrinkable cable accessories needs to go through a series of processes such as Mixing → Forming → Irradiation → Expansion → Gluing. Shape memory effect of polymer materials is the basic principle of fabricating heat-shrinkable materials. The characteristics of the polymer material itself give the heat shrinkable cable accessories with good electrical and mechanical properties, light weight, easy installation and other advantages. The product is waterproof, stress control, shielding, insulation in one, can be used in a variety of harsh environmental conditions for a long time. Widely used in Electric Power Industry, Petroleum Industry, Chemical Industry, Metallurgy, Railway, Port, Construction and other fields.



Our products, including Constant force spring, have passed ISO9001: 2015 quality management system, ISO14001 environmental management system and OHSAS18001 occupational health and safety management system and the national production safety standardization certification, full implementation "6S" production management system, realize products zero defect, dedicated to provide customers with stable quality, reliable performance and high added value high quality products.



6.Deliver, Shipping And Serving of the Constant force spring


1. Your inquiry will be replied within 24 hours.
2. We offer you professional service in fluent English.
3. Keep the mass production as the sample in high quality
4. Freight forwarder: faster, safer, and convenient.
5. Quality: we have QC on each process,provide high quality products.
Any problem or needed please feel free let us know, we are glad to service for you
We are factory, we can provide competitive price. And all the products will be shipped after quality inspection. Usually we quote within 24 hours after we get your inquiry. If you can not buy our product in your local area, we will ship a sample to you (Please contact our agent or send email to our mailbox).


7.FAQ

Q1: Are you a factory or trading company?
A1: We are a factory, we can provide competitive price.

Q2: How does your factory do regarding quality control?
A2: All the products will be 100% checked before the shipment.

Q3: When can I get the price?
A3: Usually we quote within 24 hours after we get your inquiry.

Q4: How could I get a sample?
A4: If you can not buy our product in your local area, we will ship a sample to you.You will be charged a sample price plus all related shipping costs.Express delivery charge depends on the quantity of the samples.

Q5: Why choose us?
A5: Welcome to our company, we are a group of creative people.
1.High quality is our obligation
2.Customer first, contact us now!
3.Great service is our mission!
4.Quality is the essence, wealth is the fruit.
5.Your opinion is the driving force of our progress.
6.A smile on your face and a service in your heart.

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