Basic Info.
OEM
Yes
Drawings
Yes
Design
Yes
Surface Treatment
Yes
Transport Package
Custom as Required
Specification
custom as required
Trademark
custom as required
Origin
China
HS Code
7320209000
Production Capacity
80000000/Week
Product Description
OEM Hardware Small Wholesale Metal Spiral Rolling Door Double Torsion Spring
Zihuoli manufacturer, supplier and exporter a qualitative range of Coil Springs. Coil springs are precisely engineered using latest machinery at our well-equipped infrastructure. Zihuoli offer these Coil Springs various types of material sections like flat, square, round and rectangular. Product Description
Product Description
What is Compression spring?
Compression Springs are open-coil helical springs wound or created to oppose compression along the axis of wind. Helical Compression is the most typical steel springtime arrangement. These coil springs can function individually, though commonly assembled over a guide rod or equipped inside an opening.
Typical Compression Spring Design Terms
According to the Spring Manufacturers Institute Handbook of Spring Design, commonly used compression spring terminology includes the following:
Wire diameter (d)
Outside Diameter (O.D)
Inside Diameter (ID)
D coil diameter =Outside Diameter. (O.D. + I.D.)/2 or O.D. - d
Free Length = The total length of a compression spring when it is unloaded.
Pitch (P )= the distance between the wire centers in adjacent active coils. It is best practice to specify the number of active coils rather than the pitch.
Compression Spring Materials
Zihuoli Spring custom compression springs from a variety of materials. Music wire, hard drawn, stainless steel (type 302, type 316), oil tempered, chrome silicon, and phosphor bronze are the most common material types for compression springs. We also make compression springs out of more exotic materials like Inconel, Monel, Beryllium Copper, and others.
In order to provide our customers with the shortest lead times possible, we stock several of these material types in various diameters.
Compression spring materials that are commonly used include:
• Carbon Steel
• Stainless steels
• Alloy steel
• Copper Base Alloy
• Nickel Base Alloy
• Cobalt-Nickel
• Titanium
Zihuoli Springs Capability for Different Compression Spring Body Shapes
There are four different body designs for compression springs are produced by Zihuoli Spring.
Zihuoli Spring is a leading manufacturer of Custom Spring. We manufacture various springs related tests and test reports: 1. Spring strength test: we have a variety of automatic spring testing machines, which can test the force, tensile strength, bending strength, compressive strength, elastic modulus, fracture elongation, yield strength and other data of spring products. The load accuracy can reach ± 0.01%, which reach GB and international standards such as ISO, JIS, ASTM and din. Salt spray test can be carried out by Salt spray test machine. We will test the corrosion resistance after the surface treatment, such as coating, electroplating, organic and inorganic film, anode treatment, rust proof oil and other anti-corrosion treatment so as to establish the quality of the product.
The torsion spring is designed to twist, which different from the compression spring designed to compress and the extension spring designed to extend. Torsion coil springs are usually used for "eject" operations, such as clips, door locks, and other similar applications. Zihuoli Spring customizes torsion spring for our customers in various industries. We have all kinds of spring wires for you to choose from.
FAQ
1.What is your min order quantity?
Normally, our minimum order quantity is 10,000pcs. The quantity can be flexible.
We also accept small order, we understand that some customers only need small qty at begin.
2. What's your term of payment?
We support TT payment/Paypal/Weston union/Moneygram. Payment ≤1000USD,100% in advance. Payment≥1000USD,30% in advance, balance before delivery.
3. How about your packing of spring?
PE Bags+ Carton, or can be customized packing depends on your order qty and requirements.
4.Wha's the material can I choose for Spring?
Stainless steel, Carbon steel(SWC),music wire/piano wire(SWP),Beryllium copper, Brass, Alloy steel, SEA9260/9254/SUP9/SUP10/SUP12/51CRV4,etc
5.What's your main products?
Compression Spring, Extension Spring, Torsion Spring, Wire Forming Spring, Stamping Parts and so on
Zihuoli manufacturer, supplier and exporter a qualitative range of Coil Springs. Coil springs are precisely engineered using latest machinery at our well-equipped infrastructure. Zihuoli offer these Coil Springs various types of material sections like flat, square, round and rectangular.
Product Description
Product Description 
| SPECIFICATION: | |
| Material | Stainless steel, carbon steel, spring steel, alloy spring steel, refractory steel, brass, metal, bronze, etc. |
| Wire diameter | 0.01~10.0mm |
| Finish | Zinc, nickel, chrome, silver, gold, imitation gold plating or as request |
| Styles of ends | Straight/short hook/double torsion/hinge/straight torsion/special |
| Load | Our computer program can assist you based on the load design |
| OEM & ODM | Acceptable |
What is Compression spring?
Compression Springs are open-coil helical springs wound or created to oppose compression along the axis of wind. Helical Compression is the most typical steel springtime arrangement. These coil springs can function individually, though commonly assembled over a guide rod or equipped inside an opening.
Typical Compression Spring Design Terms
According to the Spring Manufacturers Institute Handbook of Spring Design, commonly used compression spring terminology includes the following:
Wire diameter (d)
Outside Diameter (O.D)
Inside Diameter (ID)
D coil diameter =Outside Diameter. (O.D. + I.D.)/2 or O.D. - d
Free Length = The total length of a compression spring when it is unloaded.
Pitch (P )= the distance between the wire centers in adjacent active coils. It is best practice to specify the number of active coils rather than the pitch.
Compression Spring Materials
Zihuoli Spring custom compression springs from a variety of materials. Music wire, hard drawn, stainless steel (type 302, type 316), oil tempered, chrome silicon, and phosphor bronze are the most common material types for compression springs. We also make compression springs out of more exotic materials like Inconel, Monel, Beryllium Copper, and others.
In order to provide our customers with the shortest lead times possible, we stock several of these material types in various diameters.
Compression spring materials that are commonly used include:
• Carbon Steel
• Stainless steels
• Alloy steel
• Copper Base Alloy
• Nickel Base Alloy
• Cobalt-Nickel
• Titanium
Zihuoli Springs Capability for Different Compression Spring Body Shapes
There are four different body designs for compression springs are produced by Zihuoli Spring.
- straight cylindrical compression spring
- Conical or tapered compression springs,
- barrel compression springs,
- hourglass compression springs,
Zihuoli Spring is a leading manufacturer of Custom Spring. We manufacture various springs related tests and test reports: 1. Spring strength test: we have a variety of automatic spring testing machines, which can test the force, tensile strength, bending strength, compressive strength, elastic modulus, fracture elongation, yield strength and other data of spring products. The load accuracy can reach ± 0.01%, which reach GB and international standards such as ISO, JIS, ASTM and din. Salt spray test can be carried out by Salt spray test machine. We will test the corrosion resistance after the surface treatment, such as coating, electroplating, organic and inorganic film, anode treatment, rust proof oil and other anti-corrosion treatment so as to establish the quality of the product. 
The torsion spring is designed to twist, which different from the compression spring designed to compress and the extension spring designed to extend. Torsion coil springs are usually used for "eject" operations, such as clips, door locks, and other similar applications. Zihuoli Spring customizes torsion spring for our customers in various industries. We have all kinds of spring wires for you to choose from. 
FAQ
1.What is your min order quantity?
Normally, our minimum order quantity is 10,000pcs. The quantity can be flexible.
We also accept small order, we understand that some customers only need small qty at begin.
2. What's your term of payment?
We support TT payment/Paypal/Weston union/Moneygram. Payment ≤1000USD,100% in advance. Payment≥1000USD,30% in advance, balance before delivery.
3. How about your packing of spring?
PE Bags+ Carton, or can be customized packing depends on your order qty and requirements.
4.Wha's the material can I choose for Spring?
Stainless steel, Carbon steel(SWC),music wire/piano wire(SWP),Beryllium copper, Brass, Alloy steel, SEA9260/9254/SUP9/SUP10/SUP12/51CRV4,etc
5.What's your main products?
Compression Spring, Extension Spring, Torsion Spring, Wire Forming Spring, Stamping Parts and so on