![]() ![]() ![]() I’m using the hex type reverse thread tapered spiral extractors. ![]() I’m not going to use the T handle type extractors. The next size up from 7/64 th would be 1/8”. If you don’t have the exact size drill bit you can always go a size up because the extractors are tapered, so going a size up won’t be a problem. On T handle type extractors you’ll see that they recommend a drill bit size to use. So if you can, use left handed bits.įirst let’s examine T handle type extractors, since they’re what’s widely available at most auto parts stores. These bits cut while turning in a counterclockwise direction, and it backs the fastener out, and you may not even need to use an extractor in the first place. Let’s say you’re using a left handed bit. For example, into a coolant passage if you’re trying to extract a water pump bolt. If it’s not a blind hole, in other words the holes open on the other side, a right hand bit can drive the fastener out of its hole and drop it into this void where you don’t want it. You’re drilling with your right handed bit, the bit grabs the fastener, drives it further down and tighter into that hole, that’s going to make it that much more difficult for you to extract that fastener. That means that there’s no exit point for the fasteners. The reason I prefer left handed bits to right handed bits is, let’s say you’re drilling out a fastener, it goes into a blind hole. A left hand drill bit is different from a conventional right hand bit because it only cuts if the drill’s rotating in a counterclockwise direction. I have an assortment of hex type extractors, T handle type extractors, and left handed drill bits. Today I’m going to explain how to extract a broken fastener without damaging threads. Extracting Broken Bolts Using an Extractor ![]()
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