Coiled Spring Pins are self-retaining, coiled fasteners with a spiral structure that compresses during installation and recovers radially after insertion to maintain secure contact with the mating hole. Their flexible coil design helps distribute stress, absorb shock, and maintain reliable retention under vibration and repeated loading. As a professional Elastic Spiral Spring Pins Manufacturer, Anhui Pins Metal supplies standard and custom pins with material, dimensional, and surface treatment options tailored to your application requirements.
| Parameter | Specification |
|---|---|
| Product Type | Elastic Spiral Spring Pins |
| Material | Spring Steel / Stainless Steel |
| Diameter | Standard & Custom Diameters Available |
| Length | Standard & Custom Lengths Available |
| Design | Spiral-Coiled Elastic Structure |
| Hardness | Heat-Treated According to Material and Application Requirements |
| Surface Treatment | Natural Finish + Protective Lubricant / Phosphating / Electroplating / Other Coatings |
| Customization | Custom Dimensions, Material, Hardness & Surface Treatment |
- Controlled Radial Recovery
The coiled body compresses during insertion and gradually recovers after entering the hole, maintaining radial contact with the mating surface.
- Distributed Load Across the Coils
The spiral structure allows deformation to be shared across multiple turns rather than concentrated at a single slot edge, helping distribute operational loads more evenly.
- Stable Retention Under Load
Continuous radial contact helps maintain the pin's position when the assembly is subjected to shear loads, vibration, and repeated mechanical movement.
Spiral Structure & Stress Distribution
- Multi-Coil Construction
The pin is formed from a continuous spiral body rather than a single longitudinal split, providing multiple elastic sections that respond progressively during installation.
- Progressive Deformation
As insertion force increases, the coils deform progressively, allowing the pin to accommodate the mating hole while avoiding excessive localized deformation.
- Reduced Localized Stress
The coiled geometry distributes deformation around the pin circumference, reducing concentrated stress at one point and supporting more consistent mechanical behavior.
Fatigue Resistance & Dynamic Performance
- Repeated Load Capability
The elastic structure allows the pin to recover after loading, making it suitable for assemblies subjected to repeated shear or cyclic movement.
- Vibration Resistance
Continuous radial pressure against the hole wall helps prevent progressive loosening when the assembly experiences vibration during operation.
- Shock Load Response
The coiled structure can absorb a degree of impact-related deformation and recover its shape, helping maintain retention in applications exposed to intermittent shock loads.
Elastic Spiral Spring Pin Custom Manufacturing
- Custom Dimensions
Diameter and length can be produced according to customer drawings, assembly dimensions, and required installation conditions.
- Material & Hardness
Spring steel or stainless steel materials can be selected according to load requirements, operating environment, and required elastic performance.
- Surface Treatment
Natural finish with protective lubricant, phosphating, electroplating, and other coating options are available according to corrosion protection and application requirements.
- Drawing-Based Production
We support production from customer drawings and technical specifications, with samples available for fit and assembly evaluation before mass production.
FAQ
What is the difference between an elastic spiral spring pin and a standard slotted spring pin?
An elastic spiral spring pin uses a continuous coiled structure, while a standard slotted pin has a single longitudinal slot. The different constructions provide different deformation characteristics and should be selected according to the assembly design and loading conditions.
Can spiral spring pins be used for component alignment?
Yes. They can be used for locating and retaining components where the pin must accommodate minor dimensional variation while maintaining contact with the mating hole.
What type of hole is recommended for spiral spring pins?
The mating hole should have a suitable cylindrical profile with controlled diameter and sufficient depth. Burrs, excessive taper, or significant deformation of the hole can affect installation and retention.
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