Coiled Spring Pin Vs Slotted Spring Pin

Spring pins are also easy to insert and remove.

Coiled spring pin vs slotted spring pin.

I recently needed to buy some coiled tension pins. Coiled spring pins are flexible after installation so they absorb shock and vibration better than slotted spring pins. Spirol coiled pins spread compressive stress over the entire pin and do not have stress point concentrations. After the removal of the coiled pin a small piece of the coiled spring had drop to the floor.

Coiled spring pins are flexible after installation so they absorb shock and vibration better than slotted spring pins. They also have higher dynamic load capacities and accommodate wider hole tolerances. Coiled spring pins have a body diameter larger than the recommended hole diameter and chamfers on both ends to facilitate starting the pin into the hole the spring action of the pin allows it to compress as it assumes. A coiled spring pin also known as a spiral pin is a self retaining engineered fastener manufactured by roll forming metal strip into a spiral cross section of 2 1 4 coils.

When spirol coiled pins are installed the compression starts at the outer edge and moves through the coils toward the center. Also known as c pins slotted spring pins consist of rolled strips of steel iron aluminum or other metals that expand upon insertion. A spring pin is a hollow split dowel pin that exerts uniform outward pressure when fitted into a nut or shaft hole. Removing one of the coiled tension pins using a pin punch it was removed easily.

Comparatively slotted pins compress by closing the slot and stress is concentrated 180 degrees opposite the slot. They rely on the same principle of compression as coiled spring pins but they feature simpler design. A coiled spring pin is a hollow cylindrical pin formed from a 2 coil of either spring steel or stainless steel with swaged chamfers at each end to aid insertion. Actual diameters are slightly larger than the diameters shown allowing pins to fit tightly when installed.

The coiled pin is a self retaining fastener which works in a similar manner to a slotted pin but the design allows for the stresses to distribute equally across the coils after insertion. They also have higher dynamic load capacities and accommodate wider hole tolerances. The coiled tension pins had been factory installed on my troybuilt horse model tiller. They re manufactured to an oversize dimension so that when the pin is inserted into a hole radial forces are exerted that hold the spring pin in place.