Atlantis mission specialists Steve Bowen and Garrett Reisman are due to exit the International Space Station this afternoon for the first of three STS-132 mission spacewalks. The pair are tasked with installing "a second station space-to-ground Ku-band antenna and a spare parts platform on Dextre, the two-armed robotic Special …
Come on, nuts and bolts - they aren't rocket science.
Remeber that next time you try to fix a german kitchen mixer
I had that one a while back... The main shaft had the "wrong" screw direction. "Nice" surprise for the DIY mechanic...
Left hand threads are useful
For instance ~half of all bicycle pedals have left hand threads - else precession would tend to uscrew them...
Quite common that actually
Reverse threads are common on things that rotate. Reason being as the item turns it will tighten the fixing rather than loosen it which can lead to a failure. Even BMC managed to do this, so it's hardly rocket science.
"Righty tighty, lefty loosey."
Remember that things are not always what they seem.
I remember feeling bloody silly having resorted to the nut-splitter after rounding off all the corners of a well-tightened and somewhat rusty nut, even after liberal applications of penetrating oil and the gas torch and finding out why all my efforts had come to naught. It's called a "left-hand thread", you know.
My monumental feeling of sheepishness when I realised this cockup was only compounded by the sudden realisation that getting a replacement for my, now thoroughly butchered, 3/4" AF left-hand threaded castellated nut at half past four on a Sunday afternoon was going to be tricky.
I normally spend the first 2 minutes of any given circular saw blade swap making sure the blade is on there good and tight, then I remember that saws are all backwards and pretend I was doing it wrong on purpose. Nope, nobody has ever believed that one.
Left Handed Thread..
Generally only used on directional specific rotation mechanisims, usually wheels. (specifically on Hub Nuts!)
I doubt there are that many wheels on the ISS.
I suppose it is possible that they are used on the solar array rotational joints.
The other left handed thread
is used in light bulbs, typically those in public places.
Interestingly, my (aptly named) chum Nutter, back in the day, nicked a streetlamp bulb and had it in his bedroom light fitting - the foot long orange lamp thingies that most rural streetlamps use.
I never paid enough attention to see if it was standard bayonet fit - surely not?
(has yet to strip a left-hand rotating bolt/nut due to not coming across them, but aware of them)
Troll, because Nutter was a real life troll in many respects.
will they ever get 'roud to live space cooking programs
I'm quite looking forward to seeing them wokking on the moon.
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