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한국 Spring Pins
SPIROL offers two types of Spring Pins; the Coiled Spring Pin and Slotted Spring Pin.
The Coiled Spring Pin and its production technology was invented by SPIROL in 1948. Since that time, the Coiled Pin has proven to be the most versatile Spring Pin in the industry. Easily recognized by its unique 2 1/4 coil cross-section, Coiled Pins are self-retaining fasteners achieved by radial tension applied against the hole wall, and they are the only press-fit pins designed to remain flexible after installation. More than fasteners, SPIROL Coiled Pins are shock-absorbing elements that are integral, active components of a total assembly. Coiled Spring Pins are available in three duties, light duty, standard duty and heavy duty, to enable the designer to select the right combination of strength, flexibility and diameter to suit different host materials, strength requirements and loading types. SPIROL Coiled Pins typically offer the lowest installed cost in most applications.
Slotted Spring Pins are general purpose components commonly used in numerous fastening applications. Sometimes referred to as Roll Pins, Rolled Pins, Split Pins, C-Pins, Tension Pins or simply Spring Pins, Slotted Pins are headless hollow tubes with a longitudinal slot down the entire length with chamfered or round ends to aid installation. Slotted Pins are produced to a controlled outside diameter slightly greater than the holes in which they will be installed. The primary spring action of the Slotted Pin is focused on the area opposite the slot as the two halves of the pin compress during installation. Once installed, the pin applies continuous pressure towards the sides of the hole wall. This flexibility allows Slotted Pins to accommodate wider hole tolerances than rigid Solid Pins which results in reduced manufacturing costs of the component.
If installation equipment is required, SPIROL also offers a standard comprehensive line of Pin Installation Equipment from manual to fully automatic modules, with or without out fixturing, to support your Coiled Pin assembly requirements.
Spring Pin Types
Coiled Spring Pins
Coiled Spring Pins are commonly used as hinge pins and pivots, for locating and alignment, attaching a gear to a shaft / collar, and for fastening two or more components together.
SPIROL offers Coiled Spring Pins in three different duties, light duty, standard duty and heavy duty, to match the required strength and flexibility for each application. A pin too strong for the applied force will not flex and can cause damage to the hole. A pin too flexible could prematurely fatigue in the application. The Coiled Pin with the optimal combination of strength, flexibility and diameter will result in the prolonged useful life of an assembly. Generally speaking, light duty Coiled Pins are used in plastic and other soft, brittle or thin materials, standard duty Coiled Pins are used in mild steel and non-ferrous host materials, and heavy duty Coiled Spring Pins are used in hardened materials where space prohibits the use of a larger diameter standard duty pin.
SPIROL also offers a selection of Coiled Pins designed for common application-specific requirements such as cosmetic cases, key fobs, head rests, transmissions, card locks and ejector clips. If one of SPIROL’s standard Coiled Spring Pins does not meet your needs, our Application Engineers will work with you to design a custom Coiled Pin to meet your unique requirements.
Slotted Spring Pins
SPIROL’s Slotted Spring Pin offering consists of 1) SPIROL Standard Metric, 2) SPIROL Standard Inch and Slotted Pins per 3) ISO 8752. While SPIROL manufactures ISO 8752 Slotted Pins, SPIROL Standard Slotted Spring Pins have a slot width narrower than the wall thickness and thus do not nest or interlock. This feature, combined with a smaller expanded (pre-insertion) diameter, results in a number of advantages for SPIROL Standard Slotted Pins compared to ISO 8752 pins including lower insertion force, longer fatigue life and no interlocking.
Don’t See What You’re Looking For?
Need help choosing the most appropriate fastening solution for your application? SPIROL’s expert engineers will review your specific requirements, and design the most cost-effective Pin to meet your technical and commercial needs. Let us help!
Installation Technology for Pins
In addition to a comprehensive line of engineered components used for joining and assembly, SPIROL also offers a full range of Pin Installation Equipment designed to facilitate cost-effective and high quality assembly of your products. Our installation solutions range from manual machines to fully automatic work cells with statistical process control and error-proofing options. We are the only company of our kind that offers the total integrated solution.
Application Success Stories
Retaining Pin in Hydraulic Poppet Valve / Solenoid Valve
Customer Challenge:
A leading manufacturer of hydraulic poppet valves request support from SPIROL Engineering to recommend a pin to retain a check ball within a valve assembly subject to longitudinal shock forces.
SPIROL SOLUTION:
- SPIROL Engineering recommended that a Coiled Spring Pin be installed perpendicular to the check ball to prevent the ball from coming loose.
- The unique characteristics of the Coiled Pin provided the flexibility needed to absorb the shock loads balanced with sufficient strength to withstand the forces generated within the assembly.
- SPIROL’s Coiled Spring Pin met all performance criteria required by the customer and resulted in component and manufacturing cost savings versus the more traditional (and expensive) fastening method of using a threaded collar coupled with a threaded fastener.
- In addition to recommending the most cost-effective retaining pin, SPIROL’s Application Engineering team also recommended the appropriate hole sizes, engagement length, material type, and finish to ensure the assembly functioned properly.
Retaining Pin for Stage Lighting & Truss Assemblies
Customer Challenge:
A manufacturer of truss systems used for stage lighting and stadium seating approached SPIROL for help selecting the right fastener to retain extruded aluminum tubing to the couplers. The fastener would often be subjected to shock, vibration and the assembly had high strength requirements.
SPIROL SOLUTION:
- SPIROL Engineering recommended a 420 stainless steel Coiled Spring Pin for its combination of superior strength and corrosion resistance.
- Since Coiled Spring Pins remain flexible after installation, they absorb dynamic loading and protect the integrity of the hole to ensure retention within the truss assembly.
- Coiled Pins do not have to be oriented for strength like other Spring Pins, so the direction of the high loads is immaterial.
- Coiled Spring Pins can be removed from the hole without damage to the assembly. The same pin may be reused in the same hole. This enables the truss to be assembled and disassembled for use at different venues.
- Implementation of SPIROL’s recommended Coiled Pin met all of the manufacturer’s performance and commercial requirements and ensured ongoing integrity of the truss assembly.
Local Design, Global Supply.
SPIROL has Application Engineers throughout the world to assist you in your designs, supported by state-of-the-art manufacturing centers and worldwide stocking facilities to simplify the logistics of delivering your product.
Have a manufacturing issue you can't solve? Our engineering experts love a challenge. Recommending efficient solutions for your application requirements is what we do best. Give us a call or fill out the form below to connect with us!
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