Learning the feel for how tight is too tight is an acquired skill. Breaking bolts is an unfortunate learning experience for most new mechanics. Most often, the original threads are still in satisfactory condition, however there is no longer any means to turn the bolt. When this occurs you can try to drill the bolt out and rethread the hole using a tap. However, this would probably cause you to go to the next size bolt.
The more common method to remove a broken bolt is a tool called a bolt extractor, often referred to as an Easy-Out® . Bolt extractors are available in various shapes and sizes, and are often sold in kits. You will need to know the original bolt size to select the correct tool. Once selected you will drill a small hole in the center of the bolt. Then you will insert and lightly tap the tool into the hole until it is snug. Finally, you can turn the tool and hopefully the remains of the bolt removing them from the hole.
| Fig. 16: Bolt or screw extractors come in a variety
of shapes and sizes
|
