holkkiankkurit

Holkkiankkurit are a type of anchor used primarily in the construction industry, particularly for securing temporary or permanent fixtures to concrete surfaces. The name "holkkiankkurit" is of Finnish origin, translating roughly to "sleeve anchors."

The basic design of a holkkiankkuri involves a metal expansion sleeve and a bolt or screw. When the bolt is tightened, it pulls a cone-shaped end into the sleeve. This action expands the sleeve outward, wedging it firmly against the walls of the pre-drilled hole in the concrete. This expansion creates a strong mechanical interlock, providing a secure fastening point.

Holkkiankkurit are commonly used for attaching various items such as structural supports, railings, electrical conduits, and shelving units. They are valued for their ease of installation and their ability to bear significant loads. The size and type of holkkiankkuri chosen depend on the specific application, the weight it needs to support, and the type of material it is being anchored into. Different sleeve lengths and bolt diameters are available to suit a wide range of requirements.

Installation typically involves drilling a hole of the correct diameter and depth, cleaning the hole of any dust or debris, and then inserting the holkkiankkuri. Tightening the bolt expands the sleeve, securing the anchor. They are considered a reliable and cost-effective solution for many concrete anchoring needs.