What is the difference between keensert and self-locking keensert ?

Keenserts and self-locking Keenserts are both types of threaded inserts used to provide strong and durable threads in materials like metal, but they differ in terms of their locking mechanisms and how they prevent fastener loosening. Here’s a comparison of the two:

Keensert:

1.Locking Mechanism: Keenserts do not have a built-in locking mechanism. They rely on the tight fit of their external threads with the internal threads of the hole to resist loosening. They use serrations on the outside of the insert to achieve this tight fit.

2. Loosening Resistance: Keenserts provide resistance to loosening primarily through their interference fit. The serrations grip the surrounding material, creating friction that helps prevent the insert and the fastener from turning counterclockwise.

3. Use Cases: Keenserts are commonly used in applications where the primary concern is ensuring a strong threaded connection rather than preventing fastener loosening due to vibration or external forces.

Self-Locking Keensert:

1. Locking Mechanism: Self-locking Keenserts, on the other hand, have a built-in locking mechanism. This mechanism is designed to resist fastener loosening due to vibration, shock, or other external forces. It typically involves a locking feature within the internal threads of the insert.

2. Loosening Resistance: Self-locking Keenserts provide resistance to loosening by utilizing their internal locking feature. During installation, this feature engages with the threads of the fastener as it is screwed into the insert. This engagement creates resistance against the fastener rotating counterclockwise.

3. Use Cases: Self-locking Keenserts are specifically designed for applications where preventing fastener loosening is a critical requirement. They are commonly used in industries like aerospace, automotive, and manufacturing, where maintaining the integrity of threaded connections under dynamic conditions is essential.

The main difference between Keenserts and self-locking Keenserts lies in their locking mechanisms and their respective abilities to prevent fastener loosening. Keenserts rely on an interference fit for strength, while self-locking Keenserts incorporate a locking feature to resist loosening forces. The choice between the two depends on the specific needs of your application, with self-locking Keenserts being preferred in situations where vibration or shock resistance is a primary concern.