how can i lubricate automatically in wire ropes used inlevel luffing cranes?
89189
Use a self-lubricating sleeve ... you can find those on line
1139938
Take the loop end of the snelled hook, place it around the little piece of aluminum, and pull down with the hook.  It is spring loaded, so it may take a little force. \n\nPlace the hook into one of the slots, low enough for the spring to apply enough resistance to hold the line tight.  \n\nYou're done.
184327
Yes, centralized lubrication systems are quite common on mechanical punch presses as well as other large mechanical machinery.  Check the sources for manufacturers of such systems.  I'm almost certain that there's something made for your particular application.
903399
Hope this helps...\nBreak this question down into four independent events.  1) Bob and Joe falling, 2) Keg with nails falling, 3) Joe falling, 4) Keg falling.\n\nIf you look at one specific event, then you can assume that both sides of the pulley start at rest (since either it starts that way, or some poor guy smacks the ground or the pulley).  Therefore: look for Fnet on the total masses on the rope.  Take for instance, the first episode, where Bob and Joe (Total mass 180kg) is against the keg and nails (120kg).  Since F=ma, then the individual forces on Bob and Joe = 180(10) and the keg and nails 120(10).  So, Fnet would be 180(10)-120(10) for this specific case.  Then, you would look at the total Force, the total mass, and the acceleration of the entire system.  Once you have the acceleration, then you can easily figure out time, since you have a 16m pulley height (you have to assume Bob and Joe are starting at pulley height, otherwise the problem is unsolvable).  Just use the -1/2at^2+Vot+do=D equation, and since there is no Vo, this should be easy.\n\nDo this for each subsequent episode with the varying masses, and that should give you your total time.  Oh, and the rope has to be massless and the pulley frictionless, too.\n\nAnd unless I'm totally missing something, just plug and chug.  Good luck!
761136
Threw the books away years ago so dont have a pinout...If its the DB62 to DB15 cable Pacific Cable has it for $24.\nhttp://www.pacificcable.com/Allen-Bradley-Rockwell-Automation-Cables.html\n\nThat's an old plc...sorry for your luck.
1187231
hello friend!\n\nuse a non-flexible thread. tie a simple knot first. roll the thread at the balloon stout for 3 times. then again tie a knot. again roll it for 3 times and then tie two knots. trust me! this would work! it wont leak a bit even if u leave it for a night!!!\nhappy fighting!!
484224
Just use plenty of lube and don't rush it.
654015
Waterbase lube should be good.But since you have a wee little wee bit...then just blow wind in it...
794120
you could take a straw and heat to just before the melting point where it starts to get soft. you could also use a small gauge (meaning the wire is thick) and bend that. Then attach the tube worm to that so it looks like some of it is sticking out.
949076
U need M.A. of lever or inclined plane or what? Please be specific.
245329
Many of the manufacturers websites will have some background theory on their products. Here's an interesting website that claims to even anticipate instead of react to changing cable tension\n\nhttp://www.dfdinstruments.co.uk/ProductTechnology/towingsystem.htm
795577
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178800
To make a motor you need 28 guage copper wire that will have a dark tinted laquer on it. You cannot see it except it is usually darker than copper. In other words you can sand it off when you need to solder it or make a connection. You can buy this wire at radio shack I think.
82178
Pull the whole string out. Attach a safety pin to one end then work the safety pin through to the other side, pulling the string as you go. Tie bigger knots on the ends of the strings to avoid this in the future.
193152
You have to lube it first....\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\nshake machine parts you friggin pervs....
403112
use swinging field dynamo meter/ reaction principle.
252925
The two simplest pulley systems demonstrate the principles of their operation.  First if there is a single pulley overhead and you pull down to lift a load, you must pull with the same force as the weight of the load because oonly one rope pulls up on the load.  100 pound load = 100 pound pull.\n\nSecond, if the load is below you and you pull up on a rope connected to your own level through a pulley, you pull with a force one half the weight of the load because two ropes are pulling now up on the load.  100 pound load = 50 pounds pull + 50 pounds on fixed rope.\n\nThe overhead pulley required you to pull the rope say 10 feet to lift the load 10 feet; but the pulley below you required you to pull the rope 20 feet to lift the load 10 feet.\n\nYou can calculate more complicated pulley systems either by counting the number of ropes that are under tension that actually lift the load and dividing the load by that number or you can determine the length of rope you must pull to raise the load a given distance and use that ratio to determine your force vs the load weight.  you can do this by making sketches rather than actually setting up real pulleys, ropes and loads.  Good luck.