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Extension Springs in China
Extension springs often fail at the hook or loop before the coil body becomes the issue. On Haizol, supplier comparison can focus on Chinese spring factories that understand initial tension, end geometry, material, finish, and duty cycle before quoting.
A good quote should define wire diameter, outside diameter, body length, free length, initial tension, hook or loop style, load requirement, finish, and expected cycle life. The end form should not be left for the factory to infer from a rough sample.
Your RFQ should include wire diameter, outside diameter, body length, free length, initial tension, hook or loop style, load requirements, finish, and expected duty cycle. Haizol profiles help you check end-forming capability, coiling range, load testing, heat treatment, factory photos, and examples with similar hook geometry.
If the spring pushes instead of pulls, compare compression springs. If the part twists around a hinge or shaft, review torsion springs before sending the RFQ.
Haizol gives you profile evidence before sampling exposes the weak point. You can review end-forming capability, coiling range, load testing, heat treatment, factory photos, and examples with similar hook geometry.
Related categories: Custom Wire Forms, Compression Springs, Coil Springs, Torsion Springs, Custom Spring Manufacturing
Frequently Asked Questions
What Specifications Matter When Sourcing Extension Springs by Size?
For extension springs, size is only the starting point. Specify wire diameter, outside diameter, body length, free length, initial tension, hook or loop style, load at extension, finish, and duty cycle; the end geometry often decides whether the spring survives in the assembly.
What Should I Specify for Heavy-Duty Extension Springs?
Heavy-duty extension springs should be specified by load at extension, initial tension, hook or loop style, wire diameter, material, finish, and duty cycle. The end design is critical because a strong coil body can still fail where the hook carries the load.
Extension Springs - What Are They?
Extension springs are coils designed to stretch under load and return when the force is released. Hook or loop geometry, initial tension, body length, wire diameter, and fatigue life are often more important than length alone. On Haizol, you can compare Chinese factories by end-forming capability, coiling range, load testing, heat treatment, surface finishing, and examples of springs with similar hook geometry before sending the RFQ.
What Should I Check Before Sourcing Extension Springs?
Before sourcing extension springs, check whether the listed factory shows end-forming capability, coiling range, load testing, heat treatment, surface finishing, and examples of springs with similar hook geometry. Those details help connect the supplier profile with the drawing, material, finish, inspection, and production requirement.