To begin with, the bolt or fastener should be as flat as possible before using the left-hand drill. So, how do you use the lefthanded drill bit to extract the broken portion of the fastener? Here are the steps on how to use left hand drill bits. Of course, the drill must run in reverse when using a left-hand bit. Therefore, the torque applied by a left-handed drill bit helps loosen the broken screw.Īpparently, this method gives you a 50% chance of removing the stuck bolt without the use of other extractors. You see, right-handed fasteners are usually loosened by turning to the left. The most common use of left-handed bits is the removal of broken fasteners or bolts. How to Use Left-Handed Drill Bits – Step-by-Step Guide The good news is that some boast flatted shanks to minimize twisting in the drill chuck. However, the most common form of left-handed bit is the general-use twist bits. On the flip side, though, their limited use can make them hard to find.Īdditionally, left-hand drill bits are available in various types. This means you can use it in reverse, unlike typical twist drill bits.īut you know what the best part is? Similar to other bits, left-handed bits come in many different sizes and lengths to choose from. They have flutes that are built to twist in a counter-clockwise direction. Step 2: Center punch the middle of the fastenerĪ left-handed drill bit is simply the reverse to a normal drill bit.How to Use Left-Handed Drill Bits – Step-by-Step Guide.
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