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Now expansion anchors may be quickly and easily removed and replaced without the need to take down existing attachments or to provide temporary supports. Drillco's ultra thin wall Bolt Extractors® over drill the existing expansion anchor and leave a resulting hole sized to accept a replacement anchor only 1/8" larger than the one removed. For example, a 1/2" wedge bolt may be drilled out and a 5/8" wedge bolt substituted in its place. Or, a wedge bolt may be drilled out and replaced with a Drillco Maxi-Bolt® all in one easy operation. Since the existing anchors are drilled out, no concrete spalling results from the replacement process. Drillco Plate Cutters® are used to provide the proper hole size in the attachment.
Enlarging Hole Diameter in Plate |
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With a Drillco hand held drilling unit, drill over the existing bolt with the appropriate Plate Cutter®. The bolt to be removed will serve as a guide to center the Plate Cutter®. Apply constant pressure to the tool, using water to lubricate the bit. A 1" thick steel plate will take approximately 3 to 5 minutes to drill through. |
Bolt Extraction |
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Utilizing the
same drilling machine, place the Bolt Extractor Bit® over the
existing bolt. With water flowing, drill through the concrete
using the existing anchor bolt as a guide. |
Installation of Replacement Anchor Bolt |
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The removal
of existing anchors maintains the outside diameter of holes
capable of accepting replacement anchors. The installation of
these anchors should follow the manufacturer’s
recommendations. |
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Products and Equipment |
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Drillco provides the Bolt Removal System for removal and replacement of all types of anchor bolts. Since many combinations are possible, Drillco offers this system in kits for many applications. For your convenience, each kit contains the necessary Bolt Extractors®, Plate Cutters®, and Centering Guides, as well as a detailed Bolt Removal Procedure. |
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