Skip to main content
Stesso

Understand Bit Design and Limitations

0:05
1:25
10.5K views

At 0:05 in

Broken Or Stripped Bolt? #homerepair #diy #tools #automobile

Watch on YouTube

What happens here

The demonstrator explains a key design feature of these left-handed bits: they are only fluted for the first 3/4 of an inch. This design choice is deliberate to maintain the strength of the bit's shank. He emphasizes that if the fastener hasn't begun to turn out within that 3/4 inch depth, continuing to drill deeper with this type of bit is unlikely to succeed. At this point, one should consider switching to a dedicated screw extractor (though a large one is shown for illustrative purposes, smaller ones are typically used for screws).

Goal: Learn about the limited fluting of left-handed bits and when to consider alternative extraction methods.

Tools and materials

  • Left-Handed Drill Bit
  • Screw Extractor (Optional)

What they say

Hide

Nobody ever wants to use left-handed bits cuz when you're reaching for a left-handed bit, you're trying to solve a problem you wish you didn't have. Uh, number one, notice we only flute the first 3/4 of an inch. Reason being, when you flute a bit, you weaken the shank. And if you've used left-handed bits before, you know, if you're more than 3/4 of an inch deep and that hasn't pulled it yet, that ain't what's going to pull it. And you're ready to go to an extractor. Now, you're probably not going to use an extractor that big, but point being is that's why we do that. And then I've actually had to cut bits in half before to get it into a tight area. Don't cut ours in half. We did it

Auto-generated from the video audio.