What are coiled spring pins used for?

Spiral pins are also referred to as coiled spring pins or, simply, coiled pins. They are a type of spring pin, typically produced by rolling a sheet of sprung steel into a spiral to form a pin. They’re used to provide enhanced strength, flexibility, and fatigue resistance.

What is the difference between a roll pin and a spring pin?

Also known as a roll pin, a spring pin is a type of fastener that’s used to join two or more machine components. They are called “spring pins” because they contain a spring that expands upon insertion.

What is a coiled spring pin?

Coiled Spring Pins are shock-absorbing fastening elements that provide flexibility, uniform strength, equal stress distribution, closer diameter tolerances, no interlocking, trouble-free automatic feeding, and they reduce costs. SPIROL invented the Coiled Spring Pin and its production technology in 1948.

What is a Spirol pin?

SPIROL invented the Coiled Spring Pin and its production technology in 1948. More than fasteners, SPIROL Coiled Pins are shock-absorbing elements that are integral, active components of a total assembly. A problem solver, SPIROL Coiled Pins offer the lowest installed cost in most applications.

Where should spring pins be used?

Spring pins may be used to retain a shaft as a journal in a plain bearing, as a type of key to fasten one shaft to another, or to precisely fasten flat faces of mating parts together through symmetric hole locations.

Can you reuse roll pins?

And, yes, it’s OK to reuse a roll pin, if the ends are still tapered and the pin is still straight. This may not happen with some of the larger pins, but something like an ejector or gas tube pin can usually be reused without worries.

Can spring pins be reused?

When driven from a hole, the SPIROL Coiled Pin expands towards its original diameter. The same pin may be reused in the same hole.

What is a groove pin?

Grooved pins are solid press fit fasteners that are quickly gaining in popularity. They feature three parallel grooves and are commonly used as locking devices, pivots, levers, or locating elements.

Are spring pins hardened?

High-carbon (1070-1095) steel spring pins are hardened to Rc 46-53 and 420 stainless steel spring pins are hardened to Rc 43-52.

Can you drill out a roll pin?

Drill Out. Some roll pins may be so tight or rusted inside the hole that the only alternative is to completely remove the pin by drilling it out with a carbide bit. Once the pin is removed, the hole can be re-drilled with a slightly larger bit. A larger roll pin must be inserted after the repairs are made.

What are roll pins made of?

Roll pins (slotted steel springs, slotted spring pins) are made of rolled steel or another, similar metal and then rolled into a cylindrical shape. These headless, hollow fasteners have a slot that runs longitudinally down the length of the pin. Various types of specialty and proprietary spring pins are also available.

What are coiled spring pins?

Standard duty Coiled Spring Pins, sometimes referred to as “medium duty”, provide the optimum combination of strength and flexibility in nonferrous and mild steel assemblies. Standard duty Coiled Pins are also recommended in hardened components because of their shock absorbing abilities.

What types of spring pins does Spirol offer?

SPIROL offers inch (imperial) standard duty Coiled Spring Pins in diameters ranging from .031” (1/32) up to .750” (3/4). Standard materials include high carbon steel, 302/304 austenitic (nickel) stainless steel, and 420 martensitic (chrome) stainless steel; as well as 6150 alloy steel for diameters .625” (5/8) and larger.

What is the size of a coil pin?

Otherwise known as Spiral Pins, Coil Pins, Roll Pins or simply Spring Pins, Coiled Spring Pins are available in both inch and metric sizes in a variety of materials and finishes from.031” (1/32)/0.8mm in diameter up to.750” (3/4)/20mm in diameter.

How do you use spiral pins?

For tough jobs, these spiral pins are 30% stronger than our standard coiled spring pins. They remain flexible after installation to absorb shock and vibration, and work well in holes that are out of round. Flip the handle 180° to expand and contract the shaft for a tight, vibration-resistant fit. Retract the nose by pulling the knob.