Spiral Roll Pin are headless, hollow cylindrical fasteners manufactured by rolling a strip of elastic material, such as spring steel or stainless steel, into a coiled structure. The pin features a spiral cross-section with chamfered ends for easier insertion. Due to its unique coiled design and elastic properties, it is commonly used for component alignment, fastening, and connection in mechanical assemblies, especially in applications exposed to shock, vibration, and dynamic loading.
Common Materials
Carbon Spring Steel (such as 65Mn steel)
Carbon spring steel offers good elasticity and cost efficiency. After heat treatment and surface finishing processes, such as black oxide coating or phosphating, it provides stable spring performance and fatigue resistance for general mechanical applications.
Stainless Steel (such as 420 stainless steel, 304/316 austenitic stainless steel)
420 stainless steel provides high strength and good corrosion resistance, making it suitable for applications requiring higher fatigue resistance and corrosion protection, including petrochemical and marine environments. Austenitic stainless steels, such as 304 and 316 stainless steel, offer excellent corrosion resistance with relatively lower mechanical strength, making them suitable for general corrosive environments.
Technical Specifications
| Standard | Specification | nominal diameter | Material | Custom Capability |
| ISO | ISO 8748 | φ1.5-φ20 | Steel&stainless steel | Customization services available |
| ISO | ISO 8750 | φ0.8-φ20 | Steel&stainless steel | Customization services available |
| ISO | ISO 8751 | φ1.5-φ8 | Steel&stainless steel | Customization services available |
| Custom Item | Available Options |
| Diameter | Custom diameters are available to meet specific application and assembly requirements. |
| Length | Custom lengths can be provided according to customer drawings or project specifications. |
| Tolerance | Precision tolerances can be customized to ensure accurate fit and reliable performance. |
| Hardness | Customized hardness levels are available based on material selection and application requirements. |
| Surface Finish | Various surface finishes and treatments can be customized to improve corrosion resistance and service performance. |
Spiral Roll Pin type
Typical Applications
Coiled Spring Pins are widely used in mechanical assemblies where reliable fastening, vibration resistance, and long-term durability are required. Their spiral rolled design provides uniform flexibility, excellent shock absorption, and consistent holding force, making them suitable for automotive components, industrial equipment, precision machinery, and various assembly applications.
- Automotive Components：Used in steering mechanisms, transmission systems, and other vehicle assemblies where secure component positioning and resistance to repeated mechanical loads are required.
- Industrial Machinery：Applied in automation equipment, machine assemblies, and mechanical drive systems to provide reliable fastening while allowing slight flexibility during operation.
- Electrical & Electronic Equipment：Suitable for compact assemblies that require space-efficient fastening solutions with consistent holding performance and easy installation.
- General Mechanical Assemblies：Used for securing gears, shafts, levers, and other connected components where alignment accuracy, assembly reliability, and long service life are important.
Spiral Roll Pin Manufacturing Process
Custom Spiral Roll Pin manufacturer
Anhui Pins Metal Products Co., Ltd. is a professional Solid Dowel Pins manufacturer in China specializing in precision metal pins and custom fastening components. The company provides precision dowel pins, spring pins, slotted pins, and customized pin solutions for automotive, industrial machinery, and mechanical assembly applications. With OEM/ODM manufacturing capability and strict quality control, CHN-PINS supports global buyers looking for a reliable dowel pins supplier and custom precision pins manufacturer.
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FAQ
How do you ensure the quality consistency of Spiral Roll Pins in bulk production?
Each production batch is controlled through dimensional inspection, material verification, and performance checks to ensure consistent quality and reliable assembly performance.
What factors should be considered when selecting the right Spiral Roll Pin?
Selection depends on application conditions such as load requirements, installation space, vibration levels, material compatibility, and expected service life.
Are Spiral Roll Pins suitable for high-vibration applications?
Yes. Their flexible structure allows them to absorb impact and maintain stable retention performance, making them suitable for assemblies exposed to vibration and repeated loading.
What surface treatments are available for Spiral Roll Pins?
Surface treatments such as oil coating, zinc plating, black oxide, and other customized finishes can be provided to improve corrosion protection and meet specific application needs.
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