Quantity Updated
Please note, the order volume has been updated. This is due to package and minimum order quantities.
Please note, the order volume has been updated to. This is due to package and minimum order quantities.
Please note, the order volume has been updated. This is due to package and minimum order quantities.
Please note, the order volume has been updated to. This is due to package and minimum order quantities.
To properly clean a drilled hole for a Hilti adhesive anchor, the installer must follow the Instructions for Use (IFU) provided with the product. The most common procedure is the 2 Blow x 2 Brush x 2 Blow method using a 90 psi minimum air compressor and matched diameter steel wire brush.
Following this procedure helps to ensure the drill hole is free of dust and debris, giving the adhesive anchor a clean surface to bond to and penetrate the concrete.
Not following the hole cleaning procedure leaves a significant amount of dust and debris in the hole, preventing the adhesive from bonding to the base concrete.
Other adhesive anchor manufacturers have different cleaning methods, so it is imperative to check the Instructions for Use included with all adhesive anchors.
Key Takeaways
Concrete International, V33, No 1, pp. 57-63 01/ 2011
Grosser, P; Fuschs, W.; Eligehausen, R.; University of Stuttgart
Improperly cleaned drilled holes can have a significant effect on the performance of adhesive anchors.
Hilti SafeSet™ Technology is a proven methodology developed by Hilti concrete construction experts to provide new ways for engineers and contractors to reduce installation errors. Hilti offers two SafeSet™ solutions for adhesive anchors. The Hilti HIT-Z, a torque controlled adhesive anchor that does NOT require hole cleaning and Hilti's Hollow Drill Bits combined with Hilti's VC 20/40/150/300 vacuums clean the holes as they are being drilled.
The HIT-Z Rod, when used with HIT-HY200, eliminates the need for hole cleaning by relying not only on bond but also expansion forces. Due to the special design of the helix and the expansion forces generated by torqueing the anchor the need for drill hole cleaning is NOT required.
A Hilti proprietary coating on the helix prevents bonding between the HIT-HY 200 and the HIT-Z Rod.
Applying the installation torque to the nut forces the HIT-Z Rod up, which in turn pushes the HIT-HY 200 into the sides of the drilled hole, creating friction and expansion forces.
Even without cleaning the drill hole, the HIT-Z Rod performs just as well as the standard cleaning method.
For the non-hole cleaning method, the HIT-Z Rod will only work with with HIT-HY 200. The HIT-Z rod is included in the ICC-ES ESR for HIT-HY 200.
The Hilti Hollow Drill Bit is a hammer drill bit that removes dust and debris as it drills when attached to a Hilti VC 20/40/150/300 vacuum.
Each hollow drill bit has four openings at the tip of the drill bit. The dust is sucked up into the holes and up through the center of the drill bit.
Hilti Hollow Drill Bits must be used with Hilti's VC 20/40/150/300 vacuums. These vacuums have a minimum suction capacity of 129 ft3/min and a self-cleaning air filter that helps prevent loss of suction.
With the hollow drill bits and vacuum cleaning the hole as its drilled there is no need to use the blow/brush/blow method after drilling is completed and there is no reduction in load performance.
The Hilti Hollow Drill Bits are an approved installation method listed in the ICC-ES ESRs for both HIT-HY 200 and HIT-RE 500 V3.
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Our executive will call you back shortly
An e-mail has been sent to our Customer Service team for follow-up. You will receive a copy of your request for your records.