## Supply All Kinds of Springs

Kathysia industrial Co., Ltd was reorganized from Zhengzhou spring factory, which founded in 1957, having more than 60 years of professional experience in this field. Kathysia is a designated spring products supplier by the Chinese ministry of machinery industry, and a member of China spring association.

We Supply all kinds of Springs for all applications, If you can’t find a stock spring for your application, or would like to match a competitor’s spring not offered through this website, Our engineering staff is ready to answer your questions or assist in designing the right spring for your application.

### schoolphysics ::Welcome::

Each part of the drawing shows what happens when an extra 50g is added to the spring. The spring is getting longer and longer. We call the difference in length between the new length and the length without any weight on the spring the extension of the spring.

Color coding is the consistent measure for extension springs (a 150lb red spring for a 7' door could have been manufactured in several different sizes) If you are not sure what color your old spring was, use a bathroom scale to weigh the door while it is unsprung and disconnected from your door opener.

From the data table you plot a graph of total force (= tension) versus the total extension in the spring length (graph sketched on the left). (the tension in the spring equals the force created downwards by the weight of mass). Draw the line of best fit from the 0,0 graph origin. If the spring is truly elastic a linear graph is obtained.

ANSWER: A spring rated at 50#s is more than enough to handle a 42# door. The length of the spring i critical, since the old spring will have stretched some with age. Just orders springs that are close to the length of the old springs, preferably slightly smaller. Compensate by adjusting the lengths of the cables during installation. by Donald R a

Hooke's law is a law of physics that states that the force (F) needed to extend or compress a spring by some distance x scales linearly with respect to that distance. That is: =, where k is a constant factor characteristic of the spring: its stiffness, and x is small compared to the total possible deformation of the spring. The law is named after 17th-century British physicist Robert Hooke.

### Chrome Silicon

Optimum Spring manufactures extension, torsion and compression springs with Chrome Silicon - ASTM A 401 - Spring Wire Properties Our website is currently under maintenace. If you need to reach us for a Request for Quotation or any Questions

If we add weight in increasing increments to a spring, the extension of the spring will be directly proportional to the weight added. We can predict the weight (force) added to a spring simply by knowing the resulting extension when the weight is added to the spring. For example, our mystery weight was added, and the extension was 46.2cm.

May 09, 2008聽路 Yes, RD, that is the standard graph you get when you permanently stretch a spring. But when it comes out of the box with the coils are squashed together you get a (force / extension) graph which doesn't go through the origin however little you stress it. This is because a fraction of a Newton is needed before the spring starts to stretch at all.

Definition of Extension Spring Calculations: The process of calculating the shear modulus of a spring wire, young's modulus of spring wire, poission's ratio for spring wire along with a springs wire diameter, mean diameter and number of active coils to obtain an extension spring calculation.

$3798 /each. The Overbuilt 150 lb. Extension Springs (2-Pack) are made of spring steel and designed to be mounted perpendicular above the horizontal track of the garage door. They stretch to provide lifting power for the garage door.

### HOOKE'S LAW AND A SIMPLE SPRING

If a weight, W = mg, is hung from one end of an ordinary spring, causing it to stretch a distance x, then an equal and opposite force, F, is created in the spring which acts to oppose the pull of the weight. If W is not so large as to permanently distort the spring, then this force, F, will restore the spring to its original length after the

Initial Tension. The design of an extension spring is affected by the spring's initial tension. The Springulator offers a unique function that allows you to adjust your extension spring initial tension to see how this affects the rate, active coils, part weight, body length and allowable stress.

In an actual experiment, either F or x could be the independent variable depending on how you set up the measurement. If you load the spring by hanging weights off the end and measure the net stretch, then F is independent and x is dependent. I

UTC Physics 1030L: Spring Constant 70 show (6) the calculation for the percent difference between the two determined values of k and for (7) the ratio of me-spring to mspring. 4. Graphs: Include your graph of (1) F vs. 螖x from part I of the experiment and (2) T2 vs. m from part II of the experiment.

Measurement of mass vs. weight . Weight is measured using a scale which effectively measures the pull on the mass exerted by the gravity of the earth. Mass of a body is measured by balancing it equally with another known amount of mass. Mass may be measured using a pan balance while Weight may be measured using a spring balance.

### Understanding the Garage Door Spring Color Code and

If the spring is broken just measure its companion spring which will be the same length. Selecting the Right Extension Spring - While measuring torsion springs to make sure you get the right one is fairly easy getting the right extension spring is even easier. That鈥檚 because garage door extension springs have a stripe of color on them that indicates their size.

A standard 25 steel gauge 8 x 7 residential garage door from Unique, Raynor, Amarr, Haas, Midland, DoorLink, Garaga, Northwest, Hormann, Delden, Clopay, Midamerica, Martin, Overhead, C.H.I, Wayne 鈥?Dalton and Windsor will weigh approximately 75 鈥?80 LBS, and an insulated will garage door weigh approximatly 85 鈥?90 LBS.

Garage door stretch springs are rated by there lifting capacity usually using a weight. If you need to purchase springs for a door weighing 160 lbs you would order 160lb springs. The pair together would be capable of lifting the 160lb door.

Century Spring warehouses the largest inventory of high-grade carbon steel and stainless steel extension springs in the world. As the leading extension spring manufacturer, Century's extension springs available in a variety of finishes, tolerances & ends including hook & full-loop configurations.

spring constant (k) is measured in newtons per metre (N/m) extension (e), or increase in length, is measured in metres (m) Example. A force of 3 N is applied to a spring.

### What do force extension graphs for springs show?

1 Answer 1. active oldest votes. up vote 0 down vote. The force vs extension graph which is drawn is not the net force on the spring rather it is either the external force acting on the spring (F = kx) or the force exerted by the spring (F = -kx) where x is the extension of the spring.

Spring Questions (click on the question to reveal the answers) How do we work out the extension of a spring? Where do we mark the elastic limit on a graph? If we stretch a spring beyond its elastic limit, then remove the force, will the spring go back to its original length? of page