Compression Helical Springs for Sale

Basic Info

Model NO.	DF2012008
Product Name	Compression Helical Springs
Business Mode	Factory OEM Service
Material Standard	GB 4357-09 or Equivalent
Surface Treatment	Zinc Coating
Coating Thickness	8~10 Micrometer
Winding Direction	as Per Your Request
End Type	Customized
Tolerance	GB Standard, Grade II
Spring Rate Tolerance	+-5%~10%
Testing Method	Random Sample Inspection
Aql Level	Aql1.0
Certificate	ISO9001, SGS, RoHS, CE
Normal Carton Size	23X23X31/Cm with No Mark
Wire Range	From Min 0.1mm(0.004inch) to Max 12mm(0.48inch)
Transport Package	OPP Bags with Blank Carton and Outer Wooden Case
Specification	customized
Trademark	DOFO
Origin	Wenzhou, China
HS Code	7320909000
Production Capacity	1, 000, 000 Pieces Per Month

Product Description

compression helical springs for sale

Helical compression springs are energy-efficient storage devices, which are also known as open-coil helical springs. These springs are designed to offer resistance against the linear compressing force applied along their axis.

#1 ATTN: Read This Before Buying

A. Due to the internet and computer display solutions. The actual products may differ fromthe pictures. Please contact our salesmen for further assistance.B. All the extension springs, compression springs, torsion springs, wire forms can be made in customized demands.C. We appreciate Drawing-Guide Production, Please send us a spring drawing as possible as you can when you inquiry.D. We appreciate your inquiries and you are welcome all the time!For a better understanding of your demand, please learn the basics of compression spring manufacturing.
#2 Working Drawing of a Compression spring

 

#3 Different End Types of Helical Compression springs
There are basically four types of ends, closed & ground, closed & not ground ends, open & ground ends, and open & not ground ends. Below is a diagram for illustration.

#4 Different Shapes and Applications of Helical Compression Spring
Compression springs are helical or spiral-like-springs. They demonstrate an open-coiled design and react to axis forces to store and return energy. Manufacturers build compression springs into a variety of products, such as Automobile suspensions, Couches, Mattresses, Vending machines, Medical devices, Pacemakers, Pens, Hydraulic, Medical, Lawn equipment, Firearms, Marine industry, Underwater oil rig piping, WatchesDifferent products require different shapes to meet their demand. The below diagram covers the common shapes of compression springs, such as conical spring, barrel spring, variable pitch spring, straight coil spring(cylinder spring) which are the most common springs, etc.

#5 Available Coating Method
Due to the government's environment policy, all the coating materials are prior to RoHS standards. Please take RoHS standard coating as possible as you can.

Coating Method	Cost	Does it Meet the RoHS requirement?	Remark
Unplated	None	Yes
Anti Rust Oil	Lowest	Yes
Black Oxide/Oxide	Lower	Yes
Normal Zinc coating	normal	No
Trivalent Zinc coating	High	Yes	Normally 8~10μ thickness, 48 hours without white rust
Nickel Plated	normal	Yes
Electrophoresis	Higher	Yes
Painting	Very High	Yes	require a longer delivery time
Stainless steel Washing	normal	Yes
Stainless Steel Electro-polish	Highest	Yes	This coating cost more than the others

FAQDOFO Spring provides a win-win service. Below we list answers to some of the questions our customers frequently asked. For anything unsure, please contact us, and we will respond within 12 hours.
Q: Which kind of materials are available? Do they meet RoHS certification?
A: DoFo Spring is able to manufacture different spring types of compression springs, extension springs, torsion springs, wire forms with a large range of High-Grade Spring Steel - Carbon steel - Stainless steel - Music Wire, all comply to the RoHS standard. The wire diameter is available from 0.001 inches to 0.075 inches, which can meet the requirement of different applications. All the spring materials meet European RoHS certification.

Q: Do you support orders in small quantity or do you only accept large runs?
A: DoFo Spring manufactures large quantity springs, small quantity springs based on your demand. We will work with you to choose the most effective solution.

Q: Does DOFO spring offer DESIGN OR initial ASSISTANCE ON SPRINGS?
A: Our engineers could help with the design with the drawing and advise to lower the production cost. Our engineer has years of experience in spring design. We could provide drawing format in CAD, 3D, and 2D design layout as well as prototype development.

Q: What is the typical lead time for custom springs?
A: The lead time varies in custom springs. For compression springs, extension springs, torsion springs, wire forms in our mold range, we are able to deliver within 25 days. However, for some complex shapes of springs, the delivery time would be around 30~40 days.

Q: Do you charge custom spring samples?
A: We make the custom springs sample charge as a subscription of formal order. In other words, the sample charge could be refunded when we receive the order. However, if your sample requires an additional mold, we will charge it.

Q: If we order large quantity springs, will you house the springs, wire forms, and ship to us based on a required basis?
A: Our warehouse provides specific stock service for long term business. You can make your shipment schedule on an annual, monthly basis. We will ship on a specific schedule.

Q: What payment term do we accept for spring orders?
A: We could accept payment terms based on T/T, L/C at sight, DP, Westunion.
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