| Obtain a variable speed reversible power drill and set it for reverse. Measure the diameter of the broken bolt to determine the size Drill-Out required. For example, if the broken bolt is 1/4" or 6mm use the 1/4"-M6 Drill-Out. We recommend 3/8" variable speed electric drill. Impact or high horsepower drills may cause damage to Drill-Out. Attach only the hex end of the Drill-Out securely into the drill chuck and tighten at all three points with the chuck key. Thread collet/extractor back against the drill chuck. See Figure 2. Make sure drill is set in reverse. Place the tip of the Drill-Out on the center of the broken bolt and begin drilling at the suggested RPMs, see Figure 1. When drilling, never let the drill tip revolve against the bolt without cutting. With the hole started, stop and observe making absolutely sure that you are at the center of the broken bolt. If you are not centered, simply angle the drill toward the center of the broken bolt and drill until the point of the drilled hole is on center. |