What are the different types of spring pins

What are the different types of spring pins?
There are three main types of spring pins: slotted pins, slotted pins, and helical pins.
Slotted Spring Pin
What is a slotted spring pin?
A slotted spring pin is a hollow, single-turn formed pin with a straight parallel groove. The width of the slot is narrower than the wall thickness of the pin, preventing interlocking or nesting with other pins. The hollow design and slots give them their unique self-locking capabilities. Their production outer diameter is slightly larger than the controlled outer diameter of the mounting hole. It is compressed when installed, placing constant stress on the host components. The pressure generated by the spring action of the pin is concentrated on the opposite side of the slot. The flexibility of slotted spring pins allows the pins to be inserted into holes with slightly wider tolerances than solid pins, reducing manufacturing costs.
Slotted Spring Pin
Toothed open spring pin
What is a toothed split spring pin?
Slotted toothed spring pins are also hollow, similar to standard slotted spring pins. However, the slots on toothed split spring pins have staggered teeth. The teeth are spaced apart to interlock when the pin is compressed. This alignment helps maintain pin roundness while minimizing lateral movement in a vibrating environment to prevent strikes. Slotted tooth pins can do double duty in certain applications, such as those that require both a mechanical stop and a spring retainer. Additionally, the slotted spring pin can be doubled to increase shear strength by positioning the slots at an angle between 90° and 180° with respect to each other.
Toothed open spring pin
Coiled spring pin
What is a Coiled Spring Pin?
Coil springs or helical pins are coiled forms made from 2-1/4 turns of steel. They are divided into light, standard and heavy duty by material thickness. The wrap design distributes stress evenly over the entire cross-section of the pin. Only the helical pin features a coil spring design that promotes 270° surface contact with host components.
Its flexible design absorbs shock and vibration to prevent damage to mating parts. Shear strength and flexibility are not affected by the direction of the force. Due to the helical design of the pin, the compression force causes the outer edge of the pin to rotate inward. When the pressure is released, the outer edge rotates outward, returning to its resting state. In a high-vibration environment, this cycle repeats countless times.

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Cylindrical Pin ISO 8734

 

Parallel Pin W/chamfer 3X36

 

Slotted Spring Pin

 

Coiled Spring Pin