Fabricating with FRP: How to Repair a Mislocated Hole (Video Series)

Sometimes when you’re fabricating with FRP, a hole may be drilled in the wrong location. This can happen for several reasons, including an error on the print, a change in the design or a mistake in the shop. Watch this video for step-by-step instructions on how to properly plug mislocated holes in FRP.

In this video, we demonstrate a quick, simple way to repair a mislocated hole. You can use this procedure as long as no new holes will intersect the plugged holes. Remember to follow common safety practices anytime you’re fabricating with FRP. Eye protection is a must. Hearing protection and gloves are also recommended.

First, determine the smallest threaded rod size that will work to plug the hole, and tap the hole for that size of threaded rod. In some cases, you may need to drill the mislocated hole larger for the tap to fit. Next, apply adhesive to both the threaded rod and the tapped hole. Screw the threaded rod into the hole and cut it off as close to the material as possible. Grind any excess rod off flush to the part. Once the adhesive has cured, you can touch up the surface with some resin or clear lacquer to give repair an aesthetic finish.

For more tips like this, download our free FRP fabrication manual.