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Black Zinc Plating Piano Wire Springs 0.05-20.0mm Double Hook Extension

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Dongguan Hezhi Hardware Co., Ltd.

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Black Zinc Plating Piano Wire Springs 0.05-20.0mm Double Hook Extension

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Brand Name :	HEZHI
Model Number :	N/A
Certification :	Rohs&Reach
Price :	$0.12 - $0.6USD/ Piece/Pieces
Payment Terms :	T/T, L/C
Supply Ability :	10,000,000 Piece/Pieces per Month According to the order
Delivery Time :	7-15 work days

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Black Zinc Plating Piano Wire Springs 0.05-20.0mm Double Hook Extension

Piano Wire With Black Zinc Plating Double Hook Stock Extension Springs

Description

Extension Spring, also known as spiral stretching spring, is generally equal pitch, the cross-section is round, they can be used in many occasions, such as production and assembly, experiment, research and development, maintenance, etc.. Tension springs occupy an important position in the global market, widely used in national defense, Marine, computer, electronics, automobile, mold, medicine, biochemistry, aerospace, railway, nuclear power, wind power, thermal power, construction machinery, mining machinery, construction machinery, elevator and other fields.

Material	Stainless Steel (SUS304,301.316,310,201,631, ect)
	Paino/Music Steel
	Carbon Steel or as your requirments
	Iron etc
Finished	Electroplating	Zinc ,Nickel ,copper ,black and so on
	Heating	In different tempurture
	Cleanning	Passivation,Clean,Rust-Proof
Process	CNC Machine
Application	used in computer, electronics, home appliances, cameras, instruments, doors, motorcycles, harvesters, automobiles, and other industries to control the movement of machine parts, ease impact or vibration, storage energy, measure the size of force and so on!
Wire diameter Range	0.05mm-20mm
Design	According to customer's drawing or sample
Packaging	PE Bag+carton Box, inner plastic bags and outer carton

Material	Type	Model number	Characteristic	Application
Stainless Steel (SUS)	With or without magnetism shine or nitrided surface, dark surface	201, 202 etc.	Less nickel plated, could not proceed salt spray test	General using craft and toys
		301, 302, 303, 304, 305, 310, 316, 321	High temperature resistance	Electronic part, home appliance, Locks, toys or can be used in all kinds of products.
		410, 420, 430 etc.	High strength	OEM aments and tableware products
		630, 631 etc.	High heat stability	Electrical application or product use under high temperature
Carbon Steel (SWC)	Low carbon steel, high carbon steel, nickel plated steel, Galvanized wire	55CrSi, 60SizMNA, 60SizCRVA	Good elasticity high hardness	Electronic part, home appliance, Locks, toys or can be used in all kinds of products.
Piano Steel (SWP)		SWP-A, SWP-B	High tensile resistance, and long worklife	Application for all kinds of small products
Copper Wire	Phosph or copper wire( C519R), Nickel plated copper, Bronze		Good conductivity of electrical	Electronics, electrical applicance, like antenna
Iron	Galvanize iron wire	Customized or normal material	Soft material	Craft spring, decoration wire

Reference Drawing

FAQ

1. How do you measure garage door Extension springs?
For a one car garage door, carefully lower the garage door onto a
bathroom scale in the center of the garage door. Read the scale.
The weight that shows on the bathroom scale is the size extension
spring you need to order. For a two car garage door, carefully
lower the garage door on to two bathroom scales
2. How far should garage extension springs stretch?
Length. Since extension springs have to stretch during the loading
phase and contract to help the door raise, length plays a major
role in door operation. Extension springs for a 7ft tall garage
door are a standard 25 inches and stretch 42 inches. Springs for an
8ft tall door are usually 28 inches and stretch 48 inches ..
3. How does tension affect a spring?
A spring under tension for an extended period of time can become
weaker. Any object will either resist or deform when subjected to
outside stress. Springs are specifically designed to deform in
order to absorb energy from outside stress, then return to their
natural state when they release that energy.
4. What is a tension spring on a sewing machine?
In most sewing machines, this resistance is controlled by a spring
and two or three plates – called the tension plates. The thread
goes in between these plates, and the spring pushes the plates
together.
5. What is the key difference between tension and spring force?
The tension force is directed along the length of the wire and
pulls equally on the objects on the opposite ends of the wire. The
spring force is the force exerted by a compressed or stretched
spring upon any object that is attached to it.

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