#Drillco anchor bolt extractor bit cracked#
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And, like the original Maxi-Bolt, Drillco's Flush-Mount Maxi-Bolt is manufactured under a documented quality assurance program. Best of all, primary hole drill bits and Undercutting Tools' are unchanged, thus eliminating the need for retooling. The Flush-Mount Maxi-Bolt has the same load allowables, spacing and edge distance requirements as the regular Maxi-Bolt. Furthermore, it is a very user friendly anchorage for fast track projects concrete may be poured without worrying about equipment design or placement changes. This Flush-Mount Maxi-Bolt is ideal for applications where equipment must be slid into place or temporarily removed. The Drillco Flush-Mount Maxi-Bolt is a high strength, ductile, undercut anchor connected to an internally threaded coupler that rests flush with concrete or attachment surfaces. Now designers and field construction personnel have the advantage of being able to place a reliable insert exactly where they want it-when they want it.

The Flush-Mount Maxi-Bolt is available in 1/2', 5/8', 3/4', 1', and 1 1/4 ' diameters.

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4,307,636) forms a conical undercut in concrete which allows the Flush-Mount Maxi-Bolt to consistently develop the full capacity of its ASTM Al 93 B7 bolting material without slippage.

Drillco's Patented Undercutting Tool (Pat.

Drillco's Flush-Mount Maxi-Bolt combines the capacity and reliability of cast in place inserts with the installation convenience typical of expansion anchors.

In-place embedment length is determined by subtracting the over-all length (second number shown in Anchor Part No. Allowable values may also be used for anchors placed in a single line and separated from other anchor lines by a minimum distance of two times the anchor embedment length.Ħ.

Screws and Bolt Size Bolt Screw Size to be Removed. Allowable values are limited to a maximum of six bolts in a two-row, three-column, or three-row, two-column arrangement. Table of screw bolt extractor sizes and pre-drill size required to use screw extractor easy-out. For tension loading, edge distance may be reduced to 75 percent of given value.ĥ. Minimum edge distances quoted are for shear or combined tension and shear. Maxi-Bolt part numbers are specified as follows: MB-Diameter Series Number - Overall Length-Sleeve Length (combined expansion sleeve and distance tube lengths).Ĥ.

#Drillco anchor bolt extractor bit plus#

Minimum concrete depth = anchor embedment plus (center-to-center spacing/2).ģ. In many applications, oil-soaked concrete prevents the use of grouted or epoxy anchors.

#Drillco anchor bolt extractor bit cracked#

Consideration of stress area reduction for limited concrete depth is not reflected in the above table. If you have an application involving high design strength requirements, dynamic loading or the possibility of a cracked concrete environment, the Drillco Maxi-Bolt Undercut Anchor is the bolt for you. Where the anchor is to be hydraulically tensioned, maximum attachment thicknesses will be reduced by one stud diameter.Ģ. Any lesser attachment thickness may be used. Maximum attachment thickness is based on torque tensioning of anchor. All other embedment and center to center recommendations based on design by analysis provisions of ACI 349. In this video I will explain the technique I use to remove damaged screws using the proper screw extractor tool and a drill bit.

*Recommendation based on independent laboratory testing. A single anchor is considered to be an anchor with no capability to redistribute its load to adjacent anchors. A single anchor used to anchor an attachment shall be designed for one half of the allowable loads noted. The allowable loads noted in the above table may be assigned to each anchor in a multiple-anchor attachment. Note that codes differ on the question of permitting reduced load allowables in cases where the design strength of concrete is less than the bolt's specified minimum ultimate strength.Ĥ. Since most codes base the design strength of concrete on the combined projected areas of all bolts in a given pattern, Drillco has provided a Projected Concrete Area Calculator to assist in concrete strength calculations.

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Applicable code provisions should be employed to determine the design strength of overlying concrete for particular anchor spacing and embedment combinations. All load allowables are premised on the concrete's ability to develop 100 percent of the stud bolt's minimum ultimate capacity. Use straight line interaction for combined tension and shear loading.ģ. Everybody knows the frustration of removing stripped screws and bolts.

#Drillco anchor bolt extractor bit pro#

Shear Case 2 applicable for plates in contact with concrete surface.Ģ. Developed in 2006, the Grabit® Pro combines many of the features found in previous products, into one part capable of extracting a variety and range of broken bolts AND screws. Shear Case 1 applicable for grouted plates. transitioned to our D WALT brand and are accessible on this site.