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Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO.
10000 Piece
$110000 Piece
$0.1Product information
High-quality Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO. supplied by Yueqing Dofo Spring Manufacturing Co., Ltd.. Bulk wholesale pricing ranges from $0.1 to $1 per Piece with a minimum order of 10,000 Piece. Inquiry for latest prices.
Spring Rate Tolerance:
+-3%~10%
Production Capacity:
1, 000, 000 Pieces Per Month
Normal Carton Size:
23X23X31/Cm with No Mark
HS Code:
7320909000
Coating Thickness:
8~10 Micrometer
Aql Level:
Aql 1.0
Trade Term:
CIF, FOB, CFR, EXW
Transport Package:
Carton and Outer Wooden Case
Specifications
Spring Rate Tolerance:
+-3%~10%
Production Capacity:
1, 000, 000 Pieces Per Month
Normal Carton Size:
23X23X31/Cm with No Mark
HS Code:
7320909000
Coating Thickness:
8~10 Micrometer
Aql Level:
Aql 1.0
Trade Term:
CIF, FOB, CFR, EXW
Transport Package:
Carton and Outer Wooden Case
End Type:
Close and Ground Flat
Shape:
Coil
Production Process:
Cold Roll
Load Type:
Compression
Product Name:
Compression Spring Ground Ends
Model NO.:
DF2101305
Trademark:
DOFO
Business Mode:
Factory OEM
Wire Range:
From Min 0.1mm(0.004inch) to Max 12mm(0.48inch)
Material Standard:
GB 4357-09 or Equivalent
Tolerance:
GB Standard, Grade II or as Per Your Requirement
Certificate:
ISO9001, SGS, RoHS, CE, Ts16949
Usage:
Industrial, Auto, Motorcycle, Home Appliance
Payment Term:
LC, T/T, D/P, PayPal, Western Union, Small-amount payment
Port Of Loading:
Ningbo Port
Packing Method:
OPP Bags with Blank Carton
Testing Method:
Random Sample Inspection
Origin:
Wenzhou, China
Surface Treatment:
as Per Your Request
Winding Direction:
as Per Your Request
Specification:
customized
Business Details
Country:
China
Business Types:
Not specified
Main Markets:
Not specified
Year Established:
1999-05-27
Annual Revenue Amount:
Not specified
Numbers Of Employees:
97
Preferred Payment Term:
LC, T/T, D/P, PayPal, Western Union, Small-amount payment
Preferred Trade Term:
CIF, FOB, CFR, EXW
Port Of Loading:
Ningbo Port
Certificates:
High Technology company certificate, ISO14001 certificate, ISO9001, Kejixingqiye, OHSAS18001 certificate, Spring engineering research center, TS16949 certificate
Product descriptions from the supplier
compression spring closed and ground ends
CLOSED AND GROUND ENDS - Same as closed ends, except the first and last coils, are ground to provide a flat-bearing surface. CLOSED ENDS - Compression spring ends with coil pitch angle reduced so they are square with the spring axis and touch the adjacent coils.
#1 ATTN: Read This Before BuyingA. Due to the internet and computer display solutions. The actual products may differ from
the 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, Watches
Different 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 |
DOFO 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.
If any question, please contact us directly.
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Supplier Review
Summary by Vivian
TRUST STARS
3.7/5
0 Reviews
Yueqing Dofo Spring Manufacturing Co., Ltd., based in China, offers a comprehensive range of spring manufacturing services, including Custom Automotive Spring Steel Metal Clips, Stainless Steel Conical Tapered Spring, and Helical Compression Spring production. They facilitate international trade utilizing FOB terms and supply products such as Music Wire Small Springs, Push Button Spring Snap Clip Locking Tube Pin, and RoHS Zinc Flake Dacromet Coating Torsion Springs. The company is an ISO9001 certified manufacturer specializing in metal clips and springs for various applications, including motorcycle suspension and automotive components.
Company Verification
0/4
Profile Completeness
67%
Avg. Product Score
0/5
Responsiveness
0%
Certification
High Technology company certificate, ISO14001 certificate, ISO9001, Kejixingqiye, OHSAS18001 certificate
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Frequently Asked Questions (FAQs)
How can I buy & import Springs from China?
You can contact verified China supplier Yueqing Dofo Spring Manufacturing Co., Ltd. through platforms like Freshdi.com to purchase Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO.. For direct inquiries, please contact Mr. Lucas, the company’s representative. The supplier has a 3.7-star rating on Freshdi and has verified. You’ll receive product details, pricing, and shipping terms directly from supplier.
What are the payments and trade terms for Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO.?
For Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO., Yueqing Dofo Spring Manufacturing Co., Ltd. accepts LC, T/T, D/P, PayPal, Western Union, Small-amount payment as the preferred payment method, the trade term is CIF, FOB, CFR, EXW, and shipments are typically arranged from port Ningbo Port, ensuring secure and timely international delivery.
What is the current price of Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO.?
The supplier Yueqing Dofo Spring Manufacturing Co., Ltd. offers Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO. at negotiation.
What are the specifications of Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO. from China?
Compression Spring Closed and Ground Ends Shape Coil Trademark DOFO Aql Level Aql 1.0 HS Code 7320909000 Model NO. is sourced from China and meets international export standards. Key specifications include: Normal Carton Size: 23X23X31/Cm with No Mark, Wire Range: From Min 0.1mm(0.004inch) to Max 12mm(0.48inch), Trademark: DOFO, Winding Direction: as Per Your Request, Aql Level: Aql 1.0, Business Mode: Factory OEM, Trade Term: CIF, FOB, CFR, EXW, Payment Term: LC, T/T, D/P, PayPal, Western Union, Small-amount payment
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$1
/ Piece
Min. order: 10000 Piece
Mr. Lucas
Year Established: 1999-05-27
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