Let us now dive further to understand the various kinds of anchor fasteners available and how they work.

A fastener or an anchor bolt is a gadget that is used to attach items or structures to concrete. Though there are lots of types of anchor bolts and styles, they are primarily exclusive to the manufacturing business. The fastener normally comprises a threaded end, which can be connected to a nut and washer for the external load. Anchor fasteners can be categorized into 2 types essentially, mechanical anchor fasteners and chemical anchor fasteners.

Types of Anchor Fasteners

Mechanical Anchor Fasteners

In the world of mechanical anchors, the size of the hole drilled plays a crucial role. It is necessary that the hole size is perfect, due to the fact that, if it is too big then it cannot adequately grip the sides of the hole and hence collapse when it is put to filling.

Mechanical anchors physically take advantage of friction anchor themselves in location. Often, the base of an anchor is developed to expand in diameter when it is inserted into the hole, such that, the growth highly grips the base material and wedges the anchor firmly in location. The force used in pushing the anchors the screw in place and prevents it from falling out.

Chemical Anchor Fasteners

Mechanical vs. Chemical Anchor Fasteners – Which one should you choose?

The chemical is then delegated set. Quick setting chemicals may set in an hour, while the more typical ones might use up to 24 hours. One should not apply load on the anchor until the chemical has actually set entirely.

Chemical anchor fasteners feature an unique injectable adhesive that helps to stick the anchor into the hole. The most load-affecting and time-consuming step in the installation procedure is cleaning up the hole prior to injecting adhesive. Therefore, Hilti has generated a variety of tools that can help install adhesive anchors faster and reliably utilizing SafeSet ™ Technology. It includes hollow drill bits, vacuum cleaners, HIT-HY 200 and the HIT-Z anchor rod that can assist you to accomplish jobs efficiently. When the hole is cleaned up of all dust and debris, it is then filled with the chemical adhesive.

The essential differences in between chemical and mechanical fasteners are noted below:

Load Capability: Regarding load capability, it is not that one version of the fastener can bear more load than the other. Both the versions i.e. chemical and mechanical fasteners are readily available in a wide variety of load scores and capabilities.

Speed: Load can just be applied to chemical fasteners once the chemical has set totally, whereas, a load can be used on mechanical fasteners immediately upon setup. So, in case of speed-critical jobs, it would be ideal to select mechanical fasteners. However, there are quick-setting anchor epoxies (chemicals) on the marketplace that take about 45 min to 1 hour to set, while regular epoxies take around 12-24 hours.

Waterproofing: Many mechanical anchors leave a minor space between the fastener and the base product. In case of fastener installations outside the structure like fixing an external A/C unit, signs, or TV antenna, a mechanical fastener version may trigger leak into the building. In such a situation, a chemical fastener is superior as the epoxy chemical fills up the recess in between the bolt and base material, rendering a water-tight connection. Chemical fasteners are for that reason suitable for external attachments where leak may be an essential aspect.


Naturally, the majority of anchors for usage in safety-critical applications are defined by an engineer. As long as the engineer inputs the ideal information in the first location, the software application will suggest a possible variety of appropriate items. Since they comprehend the difference in between a mechanical and a chemical fastener, they can pick in between alternative anchor fasteners type that is proper to the particular application.

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