We have an assembly process involving a metal/plastic joint. The screw hole is in the plastic part, but it's not threaded, the tapping screw is suppossed to thread it's way in.
214227
An electric screwdriver or drill with an adjustable torque limit has worked well for me in similar situations. The screw tends to go in straighter than by hand and the torque limit prevents stripping out the plastic hole.\n\nWK
457445
so that the manhole cover won't fall into the manhole. if it was square, then it could fall into the hole when placed diagonally. same goes for any other shape.
448932
What kind of bar ends do you have?  If they are bar caps, rather than ends, then the thing just slots over the end of your bar and you tighten up a grub screw until the cap does not move.  It works by pinching the outside of your bars.\n\nIf you have bar plugs, which look like mushrooms, then you unscrew the allen screw that runs down the middle of the two pieces so that the two are still both on the screw, bu there is a gap between them.\n\nThe plug works by expanding when you tighten the screw, so it squeezes the inside of your bars (unlike caps).  \n\nSo you have unscrewed your bar plug, then you need to insert it into the bar so that the plug is all the way in.  If the plug is a bit sticky and won't go in the bar, it might be because you have a moulding line where the bar was made.  You can just tap the bar end in with a rubber mallet or cover it with a piece of wood and tap the wood with a hammer.  The plug is probably aluminium, so it will just get crushed where the burr is and slide in.\n\nThen you just tighten the screw until it will not tighten any more.  The plug is now in.  Repeat on the other side.\n\n\n\nIt is called ghost pedalling when your pedals do that.  It is usually because your chain is too tight.  Just undo your rear wheel and move it slightly closer to the sprocket and retighten it.  There should be a bit of slack in the chain, but not a massive amount. That should sotp it from happening..\n\nHope that helps.\n\nhttp://www.westernveil.com  (add a pic).
487424
If it's an "I" beam you may be able to clamp it to on of the flanges. If not you are looking at drilling a hole & using an eye bolt. Support beams are heavy gauge steel & you chances of screwing into it without drilling are pretty remote.
197550
A di-electric union sold in plumbing stores. Example if you have iron pipe and you want to join to copper. Any good plumber could tell you at the hardware store.
414663
I may be going out on a limb here, but as a non-engineer I would guess that a solid core door is solid, and a hollow core door is hollow. However, I could be missing something.
28671
I know 2 mechanics that have put a piece of metal all the way through their finger.  Both were drill bits.  One guy went through horizontally, the other went through vertically.  Neither hit bone.  \n\nThey just put some tape over it and went on with their work.  They are both alive today, and have all 10 fingers.\n\nIf you fall on a safety pin, I think you'll be ok to not go the hospital.
260359
Not sure about using "welding rod", but I know you can spot weld and ultrasonically weld Polystyrene to Polystyrene quite well.  There is "General Purpose" and "Rubber Modified" Polystyrene.  The rubber modified is easier for spot welding, swaging and staking, so I'd assume is easier for other methods of welding.  If you use welding rod, it would need to be Polystyrene (You may get some bonding with Polycarbonate as well).  Haven't seen welding rod in either of these materials though....  maybe someone else has??
477452
pretty sure its a metal.\nhope this helps. :)
119128
The short answer is standardization.  Most threads are righthanded so that people will turn them the same way to tighten or loosen them.  Probably the original (handmade) threads were righthanded because the majority of people are righthanded and more closing force can be exereted to tighten or shut in the clockwise direction.\n\nLefthanded threads are used for specialized applications such as on B-B-Q propane tanks to avoid connection to wrong fittings.  Also wheels on the left side of cars at one time used lefthanded threads because the forces on a wheel hub would tend to tighten vs loosen loose lug nuts.\n\nStandardization permits productiuon of threads with a minimum of machines (little duplication for right and left threads) and nuts and bolts can be stocked almost exclusively as righthanded.\n\nThe threads are not righthanded because of the "righthand rule of engineering" but the rule would not work without the standard thread convention.
643419
You have the potential for galvanic corrosion.  Essentially, two metals at different potentials share electrons and one metal (the one with the higher potential) will start to erode and "plate" the other metal.\n\nTypically, using some sort of material that is a non-conductor (ceramics, rubber, etc) between the two or passivating the metal surfaces or coating the metal surfaces (prime and paint per ANSI standards) are your best options to prevent this.
599642
Depends on what you are putting together.. For some things, it's not important if you screw in all sides evenly.  However for other things that require proper alignment for functionality and ease of construction putting the screws in equally is important.  For example, when you put on a tire for a car, you should put the nuts on evenly (opposite nuts in) so that the wheel remains balancedwhen you drive.  But if you are simply puttng one board to another that does not require balance for the object to function (like wallboard) then it really doesn't matter.
5927
A dry joint is a solder joint that has not been properly soldered, a solder joint being the connection of any of the electronic components to the main circuit board. \n\nA dry joint can be fixed using a soldering iron, and a bit of solder.  Although you do have to know where it is, and be able to access that area. \n\nIf you are lucky (and have a friend with a soldering iron) you might be able to find it, although I suspect it’s either going to be a trip to an engineer, or a new monitor.
104285
The type of plastic selected has a great influence on the performance of the plated plastic part. ABS plastics are the base materials in most cases.\n\nCheck out the following:
409812
Use some different Thread Bobbins or whatever those things are that sewing thread come on. You can buy a small Dowel Rod to run through the hole. A Dowel Rod just a long wood stick and Wal-Wort and Hobby Shops have them in Crafts, also, a hardware store have them, they cheap, maybe 40 cents for the size you need.
35960
My guess is that you have to partially insert it (as far as it goes) and pull the trigger, the front of the bolt might be catching on the sear, so thus you have to pull the trigger to let it go forward.\n\nI would also assume that if it came with literature of any sort that it would atleast have a basic break down precedure.
385684
there could be somthing wrong with the opening mechanizim... there should be a hole located in the CD drive... place a pin in this and it should open!