Screw Definition and 130 Threads

OK, not the usual kind of question posed here, but not entirely off-topic either. Last weekend I was trying to remove a couple of socket cap screws (recessed hexagonal drive) that were installed with lok-tite (thanks to the lawyers). After multiple applications of heat from a propane torch...

Homework Statement How long would a 2.90 kW space heater have to run to put into a kitchen the same amount of heat as a refrigerator (coefficient of performance = 2.58) does when it freezes 1.45 kg of water at 19.4°C into ice at 0°C? Homework Equations COP=Q_c/W Q_h=Q_c + W Q=cm(deltaT) Q=mL_f...

I am trying to come up with an automated method to exert a force of around 250N downwards onto a plate. The possibilites that i have looked at so far are Weight (although this has been discounted due to the size of the weight that would be needed), Hydraulic and Pneumatic systems. However...

Is it possible or will it be possible to keep some magnetic liquids in some desired geometry and use as a traditional screw propeller ? Is it patented or visioned before ? Best regards , Mustafa Umut Sarac Istanbul

I have a 1/4 hp electric motor. I plan on attaching a piece of threaded rod to the shaft of the motor. If I put a nut on the threaded rod, and welded 2 bars to either side of the nut (running parallel to the threaded rod) how would I calculate the amount of linear force I am exerting? The...

I am in search of 1000 5mm x 30mm Allen Head Thread Forming/cutting zinc plated steel Screw but can not seem to find this particular screw anywhere! Does anyone know where I can find this screw? or possibly have it manufactured? Thank you, Mooref2

I've always seen the "hamburger and fries $4.00 " handwritten on the bottom of the menu at the Mexican restaurant across the street, but never tried it. It just didn't seem right, but I went ahead and got it for breakfast this morning. It was quite a bit of food for four bucks, but they threw a...

as i just finished my REU and was on my way to take my flight back home. one of the students offered to give me a ride to the bus stop so that i can take the bus to the airport, which is about an hour away from school. this is where the main problem occurred: there were 2 bus stops near the...

I purchased a pair of Nike AirMax 360 [size 13] shoes from a Nike retail outlet in Vadodara, GJ, India. I bought it during a sale for Rs. 10,000 (250$). I got it at 40% discount i.e. at Rs. 6000 (150$). These shoes have air-padded soles i.e. the soles are filled with pressured air [or whatever]...

I've been taking this numerical analysis class for 6 weeks. I should be getting an A+ in the class based on my understanding of the material and how hard I work. However right now I only have a B.(I've working my ass off to boost my medicore gpa) On the midterm there was a proof where we had...

Hi, Please help me in solving this problem. I need to calculate the dia of the Allen screw. I have an assembly (2 parts). Hydraulic fluid is passing thru the drilled hole. I need to calculate the dia of the Allen screw (for fastening 2 plates). The load is acting parallel to the fluids...

Homework Statement You have a screw with the distance between the threads being equal to 0.1mm. It takes a torque of 10Nm to turn the screw about 2pi radians. What would the torque be to turn a screw with the z distance equal to 0.2mm. Explain your reasoning. Homework Equations Not sure...

Hi everyone I am trying to learn how do I correctly draw, with a ruler (where are milimeters visible as much as possible) and pencil, on already given surface screw thread and on another surface (different task) how do I correctly draw, let's say, pair (or it can be just one too - study of...

Homework Statement K this is a question from GRE Testbook. At Blinky Burgers restaurant, two hamburgers and five orders of French fries cost the same as four hamburgers and two orders of French fries. If the restaurant charges $1.50 for a single order of French fries, how much does it...

It is a multi positional obstructed screw, nut , bolt starter, it is very functional and can save hours of build time, material costs are well below a £1, the tool could be a throw away or reusable for repeat jobs. Would there be a market for such an invaluable tool?

Does anyone have an idea as to the relative abundance of each of these types? Why will one type occur over the other in a given situation? Thanks, -Scott

Homework Statement A cat is standing 1m in front of a mirror. a virtual image is formed 10.0m behind the mirror. what is the radius of curvature for the mirror? Homework Equations 1/f = (1/do)+(1/di) f=+/-(1/2)*R The Attempt at a Solution (1/1m + 1/10m)^-1 = .909 .909*2 = 1.82...

Could somebody help me with this? Let’s say I have a screw that is 0.25” dia. I want to screw this screw into the wall. First question: If I turn this screw 2 times around its axis, how far the screw will go into the wall? Second question: If I rotate the screw at 10 RPM what is its linear...

I have been given the masses of 5 cups, each with a different amount of screws inside. 1st cup = 13g 2nd cup = 19g 3rd cup = 8g 4th cup = 26g 5th cup = 38g I need to find the mass of a single screw. I was not given any equations or data besides those masses I have no clue how to approach this...

I'm looking for a couple of Allen screws hard to find I guess. Cap diameter 1/8 " Thread diameter 1/16 " Length: 3/4" I searched everywhere with no luck.

Hello folks! I am about to finish the chapter "Circular motion" in my script but there is the following problem that is keeping me busy and I would very appreciate every help I can get! A M10-Screw with a pitch of 1.5 mm (means, that the screw goes 1.5 mm per revolution into the thread) is...

I have a lot of electronics, computers, CBs, HAMs located within my room. During a few events I left a non-magnetic screw driver on the floor. The next day it became magnetic. It was slightly humorous. :-p

Ok it is a doctor who tool, but vibration is notorious for loosening nuts bolts screws, otherwise there would be no need for locking wire, spring washers etc, so would it be possible to have a vibration producing tool that could undo stuborn fasteners, such a tool would be an invaluable tool...

For 10kN vertical load,I just need some instructions to follow and if someone can provide schemes and more details will be great:))))THANKS!

In a screw gauge, the pitch is defined as the distance traveled in one rotation. Is it also equal to the length of one main scale division? If the length of one main scale division is not given, then can we take it to be equal to the pitch? Or do we take it as equal to some other default value.

A shelf bracket is mounted on a vertical wall by a single screw, as shown in Figure P12.59. Neglecting the weight of the bracket, find the horizontal component of the force that the screw exerts on the bracket when an F = 86.0 N vertical force is applied as shown. Ok so we have three...

Hello everyone, we found 3 igan values: 1, 2, 3 for the last case: 3 we came out with 0 -1 0 0 -1 0 2 -2 -2 he wrote b = 0, a = c; then said igan vecotr is: 0 1 1 but clearly shoouldn't it be: 1 0 1 ?

hi does anyone knows how a power screw works, illustrations would be helpful.. thanks ss

can anybody explain me right handed screw rule

I only use gas for heating water, so I'm considering a solar water heater. It seems dumb not to go solar here in Arizona. I was wondering do any of you have a solar water heater? How do you like it? Do you have any plans on how to build one?