What device or method is used on some types of jigsaws to dampen the vibrations cause by the moving rod or sh?
458035
my jigsaw has a framulator. Do your own homework.\nMIKE
1175073
Shafts are subjected to Fatigue Loads and Torsional forces.This requires good Tensile strength combined with High elongation and Impact strength.Therefore shafts are manufactured from forged steel materials instead of castings because castings have low elongation properties although the tensile strength is more.Where damping properties are required,Castings are used.Also castings are prone to have internal defects and this may cause a catastropic failure.I hope it is clear.D.P.SARMA
861581
Cops have them too.  Use helicopters.  Require certain high speed models to come with a kill switch like are used on go-cart tracks.  Disabling it would activate a lo-jac type device or ruin the engine.
454818
I used to use "Saw Plus 32". I still use it but it is rather old.
920239
Probably something to do with watch making, try googling "watch maker lathe".\n\n\nHere you go http://www.lathes.co.uk/manson/\n\n\nJust found a smaller cnc lathe http://unit.aist.go.jp/amri/group/finemfg/English/research/microLathe1e.htm\n.\n.
377981
While i agree with droptoptommy. there are places that already have pressure splitters that might be willing to cut it for you.. sometimes for free if they arnt  busy and its no trouble.\n\nOther then that, the circular saw is about the best bet, as it cuts the straightest line and removes the least amount of material from the stone.
892108
Its a mechanical device basically used for turning ,tapering of metal,wooden jobs.It can also be used for threading ,offset turning ,boring and drilling of jobs.
785812
Use a small tube jig.  Dark colors on the body, lighter colors on the tail.  Use a 1/16 or smaller lead head.  Place a pear shaped bobber about 2-4 feet above the jig.  Cast and make short twitches back to the shore or boat.  Pause between twitches.  If the bobber goes down you know what to do.
320888
Poppet valve would be your likely answer.\n\nCheck valve is also acceptable.
302113
Hmmmm, It looks like Mr. dmb06851's engineering class has been given some tough home work again. Well, I gave Jenny one so I'll give you one. Again, it depends on the saw style. A regular circular saw would most likely have a Spur or Helical gear in it since the arbor shaft is parallel with the motor shaft. How ever, in a "rip saw", that is still considered a household tool, will have a Helical/bevel/worm gear in it. That's right, A worm-gear drive shaft that's beveled(cone shaped) that rides on the beveled face of the driven gear. Dewalt uses a straight worm gear that rides on the outer circumference of the gear but Makita uses the helical/bevel/worm.
85890
Get a thin flexible rod. Let it hang down. twist the bottom of the rod, and release it. The rod will twist back and forth. This is called a torsional oscillation.
1044284
what kind of trimmer?
489066
It sounds like a combination wax comb/fin key. The plastic comb part is to scrape of wax and to give the wax texture on his surf board. Is the shape of the diameter of the rod in the shape of a hexagon? If it is it is probably a "key" that is used to remove the skegs/fins (FCS) from his surfboard.
460879
What your actually thinking of are baffles. These cause the water to travel in a zig zag way or even perpendicular to flow direction. This slows the water by taking its Kinetic Energy and so reduces wear on other structures or machinery
1690
You may use wheel weights or shot gun shot. Usually junk yards have lead. If you have\nany old jig heads that are no longer desirable or have broken hooks, you may also re-melt these.
417664
A number of reasons.\nMostly you are trasferring energy and the lowest form of energy is heat.\nSome of the energy will be used up in deforming the copper.\nSome will be a shock wave travelling down the copper and back and making the hammer "recoil." \nHeat is caused by friction and also a certain amount is caused by a sudden compression of the material. PV=NRT.
364559
I'm going to assume that you are asking which of the two materials you listed are best at absorbing sound vibrations.  There are many methods, the two you listed are valid, albeit a bit primitive, but the link that I have included below may help you much more.  (Cork soundproofing can be quite expensive, btw.)