Custom Stainless Steel Extension Coil Springs Return Door Coils Spring for Heavy / Light Duty Doors

• Customization: Available
• Function: Buffer
• Material: Stainless Steel
• Model NO.: DYSD2024060402
• Load Type: Extension
• Production Process: Cold Roll
• Shape: Wire
• Wire Diameter(mm): 0.1mm-2.5mm
• MOQ: 1000
• Od: Customized
• Length: Customized
• Transport Package: Cartons
• Specification: Customized
• Trademark: Yuanhe
• Origin: China
• HS Code: 7320909000
• Production Capacity: 5000000PCS/Year
• Package Size: 30.00cm * 30.00cm * 22.00cm
• Package Gross Weight: 300.000kg
• Lead Time: 15 days (1 - 1000 Pieces) ; 20 days (1001 - 5000 Pieces) ; 25 days (5001 - 10000 Pieces) ; To be negotiated ( > 10000 Pieces)

Product Description

Custom Stainless Steel Extension Coil Springs Return Door Coils Spring For Heavy / Light Duty Doors 

Product Parameters

(Non-customized) Model Reference Introduction:
1.0 * 7 * 360mm for light doors 40-50cm wide
1.0 * 8 * 360mm for light doors 40-60cm wide
1.2 * 10 * 380mm for 60-70cm wide domestic doors
1.2 * 10 * 390mm for 60-70cm wide domestic door
1.2 * 10 * 440mm for 70-80cm wide domestic door
1.5 * 10 * 430 mm for wide/heavy doors 70-80 cm wide
1.5 * 12 * 450mm for wide/heavy doors 70-80cm wide
1.5 * 12 * 500mm for 80-120cm wide door/heavy door

Extension Springs

 

The extension spring is a spiral spring that bears axial tension. Its hook forms include side hook tension spring, long hook tension spring, British hook tension spring, German hook tension spring, semicircular hook tension spring, duckbill hook tension spring, etc. "Hook" is used to ensure the tension source of the extension spring. It is generally made of spring steel with circular section material. When it does not bear load, The coils of the tension spring are generally tight without clearance and work with the resilience (tension) after stretching to control the movement of the parts, store energy, measure the force, etc. Most tension springs are usually under a certain degree of tension, even without any load.

STEP ONE 

Material & Suface Treatment

Choose material:

Carbon Steel

Alloy Steel

Non-ferrous Alloy Steel

Stainless Steel

Surface treatment:

Nickel

Galvanization

Painting

Zinc Coating

Flange

STEP TWO

 

 

Confirm Wire Diameter

 

We can produce  all kinds sizes of wire Diameter. Available Wire Diameter :

0.1mm-5.5mm

 

STEP THREE

Comfirm Diameter Base

STEP FOUR

Comfirm Inside Diameter Top

.

STEP FIVE

Comfirm Outside Diameter Eyelet

STEP SIX

Comfirm free length

 

STEP SEVEN

Comfirm Types

STEP EIGHT

Comfirm C to C Length

Why Choose US

Yantai Yuanhe Machinery Technology Co., Ltd.was founded in 2008 , is a professional engaged in the research , development , sale and service of heat exchanger , air Cooler , cooling tower , windows louvers,springs and customized sheet metal parts . We are located in Yantai , Shandong Province with convenient transportation access. We have very rich industry experience and are also your trusted supplier . The company has advanced production equipment and skilled front-line employees . Dedicated to strict quality control and thoughtful customer service , our experienced staff members are always available to discuss your requirements and ensure full customer satisfaction . In addition , we have obtained ISO9001 , CE certificates. Our company's products are sold worldwide. Selling well in all cities and provinces around China . Our products are also exported to clients in such countries and regions as UNITED STATES, Germany , Australia , Japan, Korea . The company has won the unanimous recognition of consumers with satisfactory product quality and perfect after-sales service . We have a professional R & D team. We can accept OEM or ODM order . Whether selecting a current product from our catalog or seeking engineering assistance for your application , you can talk to our customer service center about your sourcing requirements. We sincerely welcome friends from all over the world to visit our company and cooperate with us on the basis of long-term mutual benefits . We are looking forward to receiving your enquiry soon

Packaging:

Carton/Wooden Box/Custom Packaging
For the plate heat exchanger and plates, standard export plywood boxes are used to protect the products from damage during delivery;

Shipping:                                                                     

1. Delivered by Air
2. Shipped by Sea
3. Delivered by international express like DHL, TNT, UPS, etc.
4. Based on the requirements of the customers.
5. Packaging Detail: plywood case or as your request.
6. Delivery Detail: 10days
FAQ                                                                                                                         
1. who are we?
We are based in Shandong, China, start from 2008,sell to Domestic Market(60.00%),Eastern Asia(15.00%),Oceania(10.00%),North America(8.00%),Eastern Europe(2.00%),Western Europe(2.00%),Northern Europe(2.00%),Southern Europe(00.00%). There are total about 51-100 people in our office.
2. how can we guarantee quality?
Always a pre-production sample before mass production;
Always final Inspection before shipment;
3.what can you buy from us?
Heat Exchanger,Air Cooler,Springs, Sheet Metal Parts,Windows Louver
4. why should you buy from us not from other suppliers?
Yantai Da Yuan Machinery Equipment Co., Ltd is a high-tech company established by a group people of 1960's with experience. We are committed to providing quality machining service and complete products making solutions.
5. what services can we provide?
Accepted Delivery Terms: FOB;
Accepted Payment Currency:USD;
Accepted Payment Type: T/T,PayPal,Western Union,Cash;
Language Spoken:English,Chinese