Various End Configs &
Hook Types
The failure point of an extension spring is almost always the hook. We engineer and manufacture specialized end configurations—from simple machine hooks to complex extended crossover loops—ensuring secure anchoring and maximum longevity for your specific assembly.
Available End Configurations
Comprehensive loop and hook manufacturing capabilities.
| End Type | Description | Best Application |
|---|---|---|
| Machine Loops | Standard loops crossing the center of the spring body. | General purpose, economical assemblies. |
| Crossover Loops | Twisted across the center, offering full-loop closure. | Applications requiring standard alignment and strength. |
| Side Loops | Loops formed on the edge/side of the spring diameter. | Assemblies with strict space constraints or specific mounting pins. |
| Extended Hooks | Straight wire extension before forming the hook. | Reaching distant mounting points without adding body coils. |
| Threaded Inserts | No loops; standard bolts are threaded into the coils. | Extremely high-load applications to prevent loop failure. |
| Swivel Hooks | Independent hooks inserted into the spring body. | Applications where the spring rotates during extension. |
Engineering the Perfect Hook
Why our custom end configurations outperform standard designs.
Our engineers adjust the bend radius and loop orientation to minimize bending stress concentrations, significantly reducing the risk of hook breakage.
Hooks can be aligned to exact angular relationships (e.g., in-line, 90 degrees, custom angles) to perfectly match your mating components.
The gap opening of the hook can be tightly controlled or completely closed to ensure the spring never detaches during extreme vibration.
We review your assembly CAD files to recommend the most robust and cost-effective hook design before manufacturing begins.
Specialized Assemblies
Where custom hook geometry solves complex engineering problems.
Blind Assemblies
Extended hooks designed to reach anchor points deep within machinery housings.
Rotating Mechanisms
Swivel hook integrations for systems that twist while stretching.
High-Vibration Environments
Closed-loop configurations for heavy engines to prevent detachment.
Space-Constrained Hardware
Side loops engineered to lay flat against mating surfaces in tight enclosures.
Ready to Optimize Your Manufacturing?
Send us your CAD files, blueprints, or performance requirements. Our engineering team will provide a comprehensive DFM (Design for Manufacturability) analysis and quote within 24 hours.