General > General Technical Chat

Multi screwdriver set: tips impossible to remove from tray

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Ian.M:
The organizer is only plastic, so why not make a 1/4" hex broach by taking a FUBARed long hex bit, grinding off the b-gg-red end and upsetting it to thicken it slightly, then chamfer the edges of the end face to ease insertion and grind slanted cutting edges into each side of it near the tip with a very thin cutoff wheel, angling away from the tip to get around a 70 to 80 deg cutting edge, and use it to relieve the hole for any bit you need tools to extract.

jpanhalt:

--- Quote from: Nusa on November 27, 2021, 07:32:32 pm ---
--- Quote from: jpanhalt on November 27, 2021, 07:03:34 pm ---... chloroform or carbon tetrachloride ... 

--- End quote ---

Both of those create extremely dangerous vapor hazards. Avoid them if you don't have relevant safety training with those chemicals. I'd never suggest using those to a novice, ever!

--- End quote ---

Neither is flammable.  Chloroform was used as an anesthetic.  Clearly, anyone with eti's experience is competent to use either.  Are you suggesting he doesn't know that all chemicals, including H2O, can be dangerous?

Nusa:

--- Quote from: jpanhalt on November 27, 2021, 07:45:26 pm ---
--- Quote from: Nusa on November 27, 2021, 07:32:32 pm ---
--- Quote from: jpanhalt on November 27, 2021, 07:03:34 pm ---... chloroform or carbon tetrachloride ... 

--- End quote ---

Both of those create extremely dangerous vapor hazards. Avoid them if you don't have relevant safety training with those chemicals. I'd never suggest using those to a novice, ever!

--- End quote ---

Neither is flammable.  Chloroform was used as an anesthetic.  Clearly, anyone with eti's experience is competent to use either.  Are you suggesting he doesn't know that all chemicals, including H2O, can be dangerous?

--- End quote ---

Ignoring your sarcasm about safety, they are poisons. If you can smell the vapors, you're already over occupational limits. If you spill a significant amount of liquid on yourself, aside from being caustic, it's an emergency...the strip off contaminated clothes on the spot and shower immediately kind. It can be fatal, or you can live with damage to liver and kidneys.

There's a reason it's now considered a last-resort anesthetic in medicine. Too many problems, even in the hands of professionals.

jpanhalt:

--- Quote from: Nusa on November 28, 2021, 12:40:49 pm ---Ignoring your sarcasm about safety, they are poisons. If you can smell the vapors, you're already over occupational limits. If you spill a significant amount of liquid on yourself, aside from being caustic, it's an emergency...the strip off contaminated clothes on the spot and shower immediately kind. It can be fatal, or you can live with damage to liver and kidneys.

There's a reason it's now considered a last-resort anesthetic in medicine. Too many problems, even in the hands of professionals.

--- End quote ---

Being afraid of anything you can smell is not science.  It is irrational.  Smell is not considered in setting acceptable limits.  In fact, many, many chemicals can be smelled at concentrations well below acceptable limits for occasional use and the converse is also true.  Nitrogen can be toxic and is odorless.

I stand by my suggestion.  Virtually any aggressive organic solvent (e.g., paint remover, particularly ones with methylene chloride) will make such plastics swell enough to remove something stuck in them.  Heat will often work too.

"There's a reason it's now considered a last-resort anesthetic in medicine. "  It is known to be difficult to administer properly, but it is as safe as many other commonly used anesthetics when used properly, which is well above the threshold for smell.

Nusa:
I never said you should be afraid of everything you can smell. I said you should be concerned if you can smell these chemicals. That is rational.

Smell is not used in setting acceptable limits. But that doesn't mean you should ignore the senses everyone is born with, especially if that's the only tool you own that will do the job.

The air we normally breathe is 78% nitrogen, 21% is oxygen. So not toxic, or we'd all be dead. The danger of nitrogen spills is the local displacement of oxygen in the air, which you need to survive.

Scoff all you want, but the dangers are real and studied even before modern anesthetics: "In 1934, Killian gathered all the statistics compiled until then and found that the chances of suffering fatal complications under ether were between 1:14,000 and 1:28,000, whereas under chloroform the chances were between 1:3,000 and 1:6,000." So no, it's not as safe as the alternatives, not even the old alternative of ether.

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