When using self-drilling anchors, what must the hammer drill adapter be?

When using self-drilling anchors, the hammer drill adapter must be the correct size for the type being installed. This is crucial because the adapter needs to fit precisely with the anchor to ensure that it drills effectively into the substrate. A proper fit prevents issues such as stripping the anchor or causing damage to the anchor itself, which can compromise the integrity of the installation.

Using an adapter that is the right size ensures that the drilling process is efficient and that the anchor can be properly seated into the material, allowing for a secure hold. Adapters that are either too large or too small will not provide the necessary torque or grip, leading to potential failures in holding capacity.

In contrast, universal, adjustable, or standard sizes do not guarantee the right fit for all types of anchors, which can lead to inefficiencies and installation issues. Each type of self-drilling anchor may have specific requirements, and using the correct size adapter aligns with best practices for safety and effectiveness in elevator installations.