biggest extension spring factory

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Product Description:

1. Spring Specification

Dimension:

1. Spring Type: Extension spring.  

2. Material: high carbon spring steel; music wire; stainless steel(SUS301,302,304,316,201,202);alloy steel(60Si2MnA,55CrSi,50CrV,60SiCr8A);copper wire ,iron wire ,

3. Wire Diameter: 0.1-65.0mm

4. Surface treatment: become black, Zinc/ Nickel/Silver/Golden/Tin plated ,polishing ,anti-rust oil, passivation ,powder coating, shot blasting

5. Certification: ISO9001:2000, ROHS

6.Packing :Inner plastic bags and outer cartons ,shipping with plastic pallet

7.OEM and ODM is accepted.
Can made by your drawings, sample and dimension

9. Advantage: Good hardness, resistance, durable.

10.  Payment:T/T, Western Union, Paypal.

11. MOQ: 5000pcs

12. Delivery time: 7-15 days after receiving your payment.

13. Application: Widely used in automobiles, motorcycles, electrical appliances, telecommunication, craft, toys ,locks,stationery,furiture ,washing machines,vacuum cleaners,lamps and lanterns,bicycles,sports equipment ,etc

Formula:

1) OD=ID+d (OD: outside diameter; ID=inside diameter; Dm=mean diameter; d=wire diameter)

2) F=Gd4*f/8Dm3Nact (F= load; G=gravity; f=deflection; Nact=active number of coil)

3) F'=F/f (F'=Spring rate)

Dimension:

Spring Type

Extension spring.  

Load Type

Compression

Material

high carbon spring steel; music wire;
stainless steel(SUS301,302,304,316,201,202);
alloy steel(60Si2MnA,55CrSi,50CrV,60SiCr8A);
copper wire ,iron wire

Wire Diameter

0.1-65.0mm

Surface treatment

become black
Zinc/ Nickel/Silver/Golden/Tin plated
polishing
anti-rust oil
passivation
powder coating
shot blasting

Type of Loops

Crossover Loops
Double Twisted Loops
Extended Loops
Full Loops On the Side
Full Loops Over Center
Machine Full Loops
Machine Half Loops
Double Full Loops . Etc

form of ends

open / closed / ground or not

Certification:

ISO9001:2000, ROHS

Packing

Inner plastic bags and outer cartons ,shipping with plastic pallet

OEM&ODM

OEM and ODM is accepted.
Can made by your drawings, sample and dimension

Advantage

Good hardness, resistance, durablehigh fatigue strength

Payment:

T/T, Western Union, Paypal.

MOQ

5000pcs or according to your requirement

Delivery time:

7-15 days after receiving your payment.

Application

Widely used in automobiles, motorcycles, electrical appliances, telecommunication, craft, toys ,locks,stationery,furiture ,washing machines,vacuum cleaners,lamps and lanterns,bicycles,sports equipment ,etc

Formula:

1) OD=ID+d (OD: outside diameter; ID=inside diameter; Dm=mean diameter; d=wire diameter)

2) F=Gd4*f/8Dm3Nact (F= load; G=gravity; f=deflection; Nact=active number of coil)

3) F'=F/f (F'=Spring rate)

2. Packing

Inner plastic bags and outer cartons, shipping with plastic pallet

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