|Another SteveTerry What Is It? is being discussed in the ControlBooth Question of the Day forum; Keeping the momentum going... (Fairly certain the coin in the pictures is for size comparison only, and has nothing to ...|
Is it a specific type of drill bit?
I didn't state it, because I hoped it wouldn't need to be said every time, but just in case:
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looks like a tap extractor
It's a Walton tap extractor. On of the greatest tools known to humankind.
Excellent at getting you out of one of the worst "Oh S..." circumstances possible. Without it, you are truly hosed.
See this video to learn how it works:
Walton Tap Extractor 10063 6/32 (6mm) Broken Tap Extractor - YouTube
Last edited by derekleffew; August 12th, 2012 at 09:47 PM. Reason: embedded video clip
handy as long as the tap needing extracting is big enough to be extracted
I can't begin to tell you how many times I have broken a tap and needed to extract it. One time, working on a small steam driven pump, we had no choice but to drill it out. 10 bits later, we retapped to a slightly larger diameter. Normally, it is old engine blocks where I'm trying to chase out the original bolt holes - but that belongs over in the motor head forums.
zmb. If you watch the video closely, you'll notice he states, "these are UL-Listed connectors, no pre-twisting of the wires is required." Among professional electricians, there's much controvery/debate over whether one should twist before installing nut. One of many threads on the topic (this example is >70 posts): Do you twist your solid wires together before you put them in a wirenut? - Mike Holt's Forum. .
It even goes beyond that, the electrics support manager for the company I work for (read: my boss's, boss's boss) will yell at you if he sees you twist the strands before crimping as well.
Avid Shoe Wearer
Personally I pre-twist some connections and don't to others. I admit that my linesman pliers get more of a workout than many other electricians, but less than some others who twist all connections. You cannot deny that my twisted connections hold better and with 100% holding. One of the conductors is NOT coming out of that wire-nut. Too many times I've had wires just pop right out and into my hand (even LIVE), hence why I tend to twist my more permanent connections.
For crimp terminals I am far less picky about having perfect twist. Depending. However when it comes to tinning I follow the CEC (Canadian Electrical Code)