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How the Drill-Out works ( Regular Drill-out)

link to How the Micro Drill-out Works


How it works drill out

DRILL SPEED
Drill-Out Size
3/8" Variable
Speed Drill
1/4" - M6
700 - 800 RPM
5/16" - M8
650 - 750 RPM
3/8" - M10
600 - 700 RPM
1/2" - M12
475 - 575 RPM

Fig. #1

drill-out
Fig. #2
Click Here for a larger,
image.

 

DRILL SPEED
Drill-Out Size
3/8" Variable
Speed Drill
1/4" - M6
350 RPM
(1/4 speed)
5/16" - M8
470 RPM
(1/3 speed)
3/8" - M10
840 RPM
(3/5 speed)
1/2" - M12
1400 RPM
(full speed)

Fig. #3

drill-out
Fig.#4
Click Here for a larger,
image.

drill-out
Fig.#5
Click Here for a larger,
image.

WARNING! ALWAYS USE PROTECTIVE EYE WEAR WHEN WORKING WITH CUTTING TOOLS...

 

DRILL-OUT POWER EXTRACTOR

  1. Obtain a variable speed reversible power drill and set it for reverse (counter clockwise).
  2. 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®.
  3. 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.
  4. Make sure drill is set in reverse.
  5. 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.
  6. 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.

THE MOST IMPORTANT STEP IN EXTRACTING A BROKEN BOLT IS TO DRILL THE HOLE ON CENTER AND STRAIGHT.

  1. With the hole started ON CENTER, hold the drill parallel to the axis of the broken bolt and continue drilling. Do not allow collet/extractor to move down towards tip while drilling. If so, thread collet/extractor back towards chuck.
  2. Stop every 1/16" or 2mm in depth to clean out chips and add cutting oil. Verify each time that you are drilling on center and straight.
  3. Stop drilling just before you reach the front of the collet/extractor. DO NOT let collet/extractor touch the end of the bolt. See Figure 2.
  4. Clean out chips from hole and use penetrating oil to help loosen the broken bolt.
  5. Advance the collet/extractor five turns from the drill chuck.
  6. Hold electrical drill firmly with both hands.
  7. Bring drill speed to suggested RPMs, see Figure 3, and plunge into the hole while applying pressure toward the broken bolt. See Figure 4.
  8. The collet/extractor automatically engages and extracts the broken bolt. See Figure 5.
  9. If drill stalls during extraction, hand removal is possible. Leave Drill-Out® lodged into the bolt and remove tool from drill.
  10. Look to see if you have drilled exactly on center. If so, use a wrench on the square collet/extractor head. Turn counter clockwise to remove the broken bolt. Do not use excessive force, damage to tool may occur.
  11. If you get a lot of resistance when using a wrench, you may have drilled off center, and the Drill-Out® tool is biting on the casting or you may be in an impossible situation. If this situation arises, remove Drill-Out® tool by turning clockwise. You may have to drill and tap new threads.
  12. To remove Drill-Out® from broken bolt, firmly tighten broken bolt in a vise. Using an adjustable wrench turn the collet/extractor clockwise and remove the Drill-Out®. If necessary, clamp the hex end of the Drill-Out® into the vise and back the collet/extractor off the drill head. Drill-Out® is ready to use again.

HELPFUL HINTS

  • Center punch before drilling to shock bolt.
  • Penetrating oil or heat is effective on rusted or chemically bonded bolts.
  • When bolt is broken below a flange, reverse collet/extractor to center Drill-Out®.

Older instructional video from 1992

link to drill-out® index page

Trademarks are the properties of their respective owner(s).

September 2022, December 2009 CSS, June 1999

The descriptions, illustrations, specifications, dimensions, and part numbers are subject to change without notice.


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