Black Sliding Screen Door Closer Springs

black sliding screen door closer springs

Shop screen door & storm door springs and a variety of hardware products online at DOFO spring.

A. 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 extension spring manufacturing.
#2 Working Drawing of an Extension spring


#3 Different Hook End Types of Helical Extension Springs
Extension springs are secured to the force source using a range of end configurations. These consist of hooks or eyes placed at different locations or intervals along the spring, smaller or enlarged eye fittings on the side or midsection, elongated loops, threaded fittings, and occasionally rectangular or teardrop forms. The machine loop and crossover loop remain the most frequently used options. Both are produced using standard equipment in a single step and should be clearly indicated whenever feasible to reduce overall expenses.


Extension springs lack a fixed end to stop overextension, resulting in reduced stress compared to compression springs. A variant known as a drawbar spring includes a fixed end and functions as a compression spring equipped with unique hook ends.

Q: Which kind of materials are available? Do they meet RoHS certification?
DoFo Spring offers a wide variety of spring solutions including compression, extension, torsion, and custom wire shapes, utilizing premium spring steel materials such as carbon steel, stainless steel, and music wire—each meeting RoHS compliance. Wire sizes range from 0.001 to 0.075 inches, ensuring suitability for diverse industrial and mechanical needs.

Q: Do you support orders in small quantity or do you only accept large runs?
A: DoFo Spring produces both bulk and custom-order springs as per your needs. We collaborate with you to develop the optimal approach.

Q: Does DOFO spring offer DESIGN service OR initial ASSISTANCE ON SPRINGS?
Our technical team can support early-stage design and help reduce manufacturing expenses. With extensive background in spring engineering, our expert can deliver CAD, 3D, and 2D design files along with prototype creation.

Q: What is the typical lead time for custom springs?
Delivery timelines differ depending on the type of custom springs. Standard spring types including compression, extension, torsion, and wire forms within our molding capabilities can be shipped within 25 days. For more intricate spring designs, the production period typically extends to 30 to 40 days.

Q: Do you charge custom spring samples?
A: The sample fee for custom springs is tied to a confirmed purchase. Essentially, the sample cost will be credited once a formal order is placed.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?
Our warehouse offers tailored inventory support for ongoing partnerships. You can plan your deliveries annually or monthly. Shipments will follow a fixed timetable.

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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