The expansion of the anchor is accomplished in different ways and the anchors are designed for different applications. Expansion bolts come in a number of different configurations and types.
Each type of expansion anchor has unique features and beenefits. Male —comes in different styles and either will protrude above the masonry surface or will insert into a predrilled hole. Female — are inserted into a predrilled hole in the concrete and has internal threads to accept a threaded bolt. Install Anchor. Position Object. Secure with nut. Important information These anchors should not be used for safety harness applications or for lifting where shock load could be applied.
Available sizing: Expansion Bolt Expansion Bolt with Hook Expansion Bolt with Eye Projection Bolt 5 x 50mm 6 x 45mm 8 x 60mm 8 x mm 6 x 55mm 10 x 70mm 10 x mm 8 x 65mm 8 x mm 10 x 70mm 10 x mm 12 x 90mm. The concrete screw is inserted into the hole and turned either by hand or by a rotation drill until the concrete screw is tight against the fixture being fastened.
Drop-in anchors are a female anchor designed to be placed in concrete and then to have a threaded rod or bolt inserted. The drop-in anchor is made up of two parts: the expansion shield made from zinc plated carbon or stainless steel and a case hardened expander plug that is cone-shaped and made from zinc plated carbon or stainless steel. One end of the shield is tapered, with four cut slots that run a portion of its length.
The surface of this end may be smooth or knurled while the other end will be smooth. The expander plug is placed at the end of the anchor that has the four slots, and the other end is threaded. The anchor is set by placing the anchor into a hole in concrete and by setting the expander plug using a setting tool.
Each diameter of the drop-in anchor has a specific setting tool. This setting tool is a steel rod with one end being necked down. The necked down portion of the setting tool is inserted into the drop-in anchor and pounded with a hammer until the lip of the anchor meets the lip of the setting tool. This action pushes the expander plug down into the drop-in anchor expanding the anchor where the four cuts are. As with all female type anchors, the size of the designated size of the anchor refers to the bolt size that goes into the anchor; the hole size is larger than the anchor size.
Machine screw anchors are a female type anchor into which a threaded item is placed. Machine screw anchors are made up of two parts, the internally threaded cone, and the sleeve. The sleeve is placed over the threaded cone and inserted into a hole drilled into the base material of concrete, brick or block, threaded cone first.
The machine screw anchor is set by the sleeve being pushed over the expander sleeve wedging the sleeve between the expander sleeve and the inside wall of the concrete. The anchor is properly set when the lip of the setting tool meets the lip of the anchor. Each diameter machine screw anchor has a specific setting tool that is designated by the diameter of the anchor being used.
The machine screw anchor size is designated by the inside diameter of the bolt to be used with the anchor, the hole size required is larger than the anchor size being used.
Strike anchors are for use in solid concrete and are considered an impact expansion type of anchor. The strike anchor is made up of four parts: the body that is made from carbon steel with an interior hole the entire length of the anchor, a drive pin that is hardened, and a nut and washer plated in a yellow zinc. The body of the anchor is threaded on one end with the other end having four slots cut a portion of the length - the surface of this part of the body has ribs around the circumference.
The length of the drive pin that is hardened must equal the length of the anchor and is placed inside the interior hole of the anchor body. The anchor is set by placing anchor into a predrilled hole in concrete with the nut and washer attached. The anchor must be tapped lightly until the nut and washer are tight against the base material or fixture being fastened down.
The hardened pin is then driven into the anchor until the head of the pin meets the end of the anchor body, which will provide for the proper setting. As the pin is pushed into the anchor, the anchor is expanded. The hole that is needed to be drilled for the strike anchor is the same diameter as the diameter of the anchor being used. Hammer drive anchors are made from a Zamac material that is strong and malleable.
Hammer drive anchors are a light duty concrete anchor, made up of two parts the body and the zinc plated steel pin. The body of the hammer drive anchor is split from the bottom up for most of its length, with a mushroom head. The anchor body is hollowed out that runs through the head thickness and down into the shank for the entire length.
The steel pin is what expands the anchor; it is made of high carbon steel, with a small head on one end and with the other end pointed. The anchor is set by hammering the steel pin into the anchor body.
As the nail pushes through the anchor body, the split part expands to push against the interior wall of the hole in the base material.
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