Removing a Damaged Screw With a Screw Extractor
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Today we are going to share with you:
How To Remove a Damaged Screw or Bolt with an Extractor
Working time: 20 minutes
Total time: 20 minutes
skill level: beginner
Estimated cost: $10 to $25 (per set of pullers)
Removing a screw or screw can be infuriating if the grooves in the screw or screw head have been damaged by efforts to remove the fastener. This can easily happen if the bra is rusted in place or you have used the wrong size tool. A few slides of the screwdriver or wrench and the head of the screw or bolt can be so damaged that it is almost impossible to hold it well with the tool.
To your rescue comes this clever little accessory: the Screw Extractor. Screw extractors come in a variety of sizes for screws with diameters ranging from 3/32 in. More than 1/2 in. They can be used on all types of screws, as well as many screws.
Screw Extractor Project
A screw extractor is a high-strength steel shaft with a square head on one end and reverses tapered screw threads on the other end. The square head fits into a T-handle that is used to rotate the puller. You can also hold and turn the tool head with locking pliers.
Tapered threads are on the business end of the tool. They are designed to be screwed back (counter-clockwise) into the head of the screw or bolt after a pilot hole has been drilled for the first time. The end is strongly tapered so the puller drives into the damaged bolt deeper and tighter as the puller is turned. Therefore, as you turn the puller counterclockwise, you are digging deeper and deeper into the damaged screw as the damaged screw goes back.
A T-handle is a useful accessory when using a threaded fitting. Named for its shape, the handle fits over the end of an extractor bit. T-handles are made to fit a variety of puller sizes, and many types also work with taps. If you don't have a T-handle, you can turn a screw extractor with locking pliers.
Use the right size puller
It is important that you use the correct size puller. Too large and it will not leave enough metal to hold the puller properly and will damage the threads that hold the bolt or stud. Too small and the torque required for larger screws and bolts can cause the puller to break. This table can help you determine the correct size to use.
- Drill and twist bits
- Screw extractor drill
- T-handle or locking pliers
Drill a Pilot Hole
To use a screw extractor to remove a screw, drill a pilot hole in the center of the damaged screw, using an appropriate size drill and drill. If the damaged screw head is rough or uneven, it may be helpful to start with a very small pilot hole, such as a 1/16 '' drill bit. Be sure to put a drop or two of engine or cutting oil on the damaged bolt before drilling; This will help prevent the drill from overheating.
Then drill a larger hole with the extractor size drill. Remember the following tips:
- The diameter of the pilot hole varies depending on the size of the extractor you are using. Follow the recommendations on the package that comes with the pump.
- Since you are drilling through metal, keep the drilling speed slow and constant; Drilling too fast will overheat the bit and quickly dull it.
- Be very careful not to break the bit inside the hole, especially when drilling with small bits.
Remove the screw
Attach the extractor bit securely to a T-handle or secure with locking pliers. Place the extractor bit in the pilot hole of the damaged screw.
With a hammer, firmly tap the puller into the pilot hole. Apply downward pressure to the puller while turning it counterclockwise to remove the damaged screw.
If the extractor slips and you lose your bite on the screw, try these tips:
- Strike the extractor more firmly to obtain a better screw bite.
- Push down more firmly while turning the puller counterclockwise.
- Slightly enlarge the pilot hole and try again.
We hope you enjoy watching this video about Tips to remove a damaged screw with a screw extractor
Source: The Information Mercenary
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