Groov-Pins are versatile press-fit fasteners that combine superior holding power and vibration resistance with extraordinary ease of application in locking-pin, hinge-pin, and pivot-pin applications. Their solid construction makes them stronger than spring pins.

A Groov-Pin is a solid cylindrical pin with three longitudinal grooves, manufactured from bar or coil stock. The three grooves are pressed into the cylindrical body to expand its diameter to a size greater than its nominal diameter in a precisely controlled way. A strong spring mechanism is created by this process.

Groov-Pin Locking Forces Locking Forces are created when the pin expanded diameter (fig. 1a) is compressed in a hole the size of the pin nominal diameter (fig. 1b). Locking forces are created both around the pin diameter and along the pin length in the vicinity of the grooves (fig. 1c). 1a - Before Inserting Groov-Pin 1b - After Inserting Groov-Pin 1c - Distribution of Locking Forces

When a Groov-Pin is pressed into a hole the size of the pin nominal diameter, the constraining action of the hole will compress the expanded material in a spring-like manner and produce a holding force. This unique locking action is accomplished without permanent deformation of either the base material or the pin.

The holding force of a Groov-Pin, with locking forces proportional to the length of the groove engaged, increases until the groove is fully engaged. Conversely, the holding force of the pin diminishes gradually as the pin is removed. The Groov-Pin provides excellent holding power in cases of severe vibration and shock, even in the case of axial displacement.

• They withstand severe shock and vibration.
• They are solid.
• They are available in different groove types to suit a wider range of applications.
• The require only a straight drilled hole.
• They reduce the number of steps in your assembly operation.
• They may be driven with a hammer, air cylinder or hydraulic press.
• They may be hopper-fed for automatic installation.
• They allow easy installation and quick assembly.
• They can be removed and reused.

The locking force increases with the length of groove engagement (fig. 2a). A fully engaged pin has maximum holding power. Holding power decreases only gradually as the pin is disengaged (fig. 2b). As a result, Groov-Pins perform well even in the presence of shock and vibration.

2a - Inserting Groov-Pin	2b - Removing Groov-Pin

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