Stainless steel precision tension spring

Specifications

Tension spring
1.Competitive price
2.Excellent quality
3.OEM service
4.Fully automatic product

Stainless Steel  Precison Tension Spring

Features of extension/tension spring

 

Each coil of extension spring close together and there are pull-tabs at both ends for puling easily. Extension spring possess initial tension which is used to keep the spring coil of pull-tabs closed.

 

Initial tension only changes in a limited range so as to realize expected load characteristics. Other characteristics, such as diameter, aperture of pull-tab can be customized to ensure that it will meet the customer’s accurately.

 

 

Detailed Information About the Spring
Material	Carbon steel, alloy steel, stainless steel, spring steel or as you request
Wire diameter	0.1mm-8mm
Inside diameter	As your request
Outside diameter	As your request
Free length	The overall length of a spring in the unloaded position
Dimension	Customized
Load type	Extension
Style of ends	Circle shackle,single shackle,side pull-tab,extension retractor
Finish	zinc, copper, nickel, silver,galvanizing, etc.
Advantage	High and durable quality, suitable price, fast delivery
Technology	Experienced engineers,technicians and skilled workers
Application	Household appliances,office equipment,communication equipment, machinery,electronics,clocks,acoustics equipment,instruments and meters.
Payment terms	T/T, L/C,WU
Lead-time	15 days
Packaging	Inner plastic bag, outer carton box, and advised by customer.
Certification	ISO9001:2008 ,ISO14001and ROHs

 

   

 

 

 

 

 

 

Knowledge of extension spring

 

Please fill this form and send it to us if you need custom extension springs

 

 

 

 

 

 

Why choose us:

 

1. Professional research and development team.

 

2. Complete first-class fully automatic production and testing equipment, careful safe package and prompt delivery.

 

3. Skilled and well-trained work team.

 

4. Provided competitive price and serious quality control.

 

5. Passed ISO9001:2008, ISO14001 and ROHs certification.

 

6. Over 10 years professional manufacture experience.

 

 

 

How to place an order:

 

1.What you need to do is send us your design drawing, samples or design concept draft, after that we will assess your products and budget unit price for you.(see bottom charts )

 

2. We’ll communicate with you again about if there is a need for sample making after your approval.

 

3. Production time of samples: 3 days for simple samples and 7 to 10 days for complicated samples which need mold open.

 

4. For customers of first cooperation, we can make a proof for free to show our capacity and high efficiency service to you. As for particularly complicated samples, we will communicate with you separately.

 

5. Mass production delivery: usually delivery time is 10-15 days, but we can try 7-10 days if it is a rush order. It depends on production plan if it’s a sizable order.

 

6. Packaging: as to complicated products, we can special design based on your packing requirement.

 

7.Our freight advantage:

  a) If you are worrying about freight trouble because of your small quantity goods, it will be the best choice to use express. We will offer you the cheaper express price than the official UPS or DHL; for example, 100kg goods only need 6usd/kg and 50kg goods only 7usd/kg. If you just place an order for 1000pcs, you only need to pay very little express charges and gain the fastest delivery.

 

  b) If you place a large order, we will help you ship goods by sea, and we are very experienced to handle with it, we can organize all kinds of goods a whole container and recommend best vessels agent for you.

 

 

About us:

 Dongguan City Yisen Precision Spring Co., Ltd. (Since 1998) is a high technology hardware company with more than 200 workers, and has been specializing in designing and manufacturing springs, hardware and spring making machines. We've gained worldwide customers' trust with our high design level, top class quality, high grade services and competitive prices, which make us become the supplier for many famous companies in many business lines in the world. Our company has been certified by GB/T19002-1994 idt ISO9002:1994 management system in order to upgrade the whole quality management and provide you with the best quality products and the most valuable services!