See full version: Calculate and design your own gas spring application now
The cover is 750 mm = 0.75 m long. So in Nm (Newton meter) the hand force at the end of the cover is 27.47N x 0.75m = 20.60Nm. That is also the difference between the red square (moment of the gas springs in Nm) and the green square (moment of the cover in Nm). Red is namely at approx. 80 Nm and green at approx. 60 Nm. here
You cannot see the calculated force here. You can only see this on the order confirmation. You do see a + and a – standing. The calculation tool has calculated a force and with the + and – you can change the force in steps. For the 6-15, 8-19 and 10-23 this is done in steps of 20N, for the 4-12 it is done in steps of 10N and for the 14-18 it is done in steps of 50N. For example, if you like the calculation, but you would like the cover to open a little lighter and close more heavily, you can click on the + once. In the simulation you will immediately see what happens with the different hand forces. So it is often the case: the lighter the cover opens, the heavier the cover closes, and vice versa.
If all data entered in step 1 matches the actual situation, it is better not to check this box. The center of gravity will then be calculated automatically. The center of gravity (black-and-white sphere in the simulation) will be near the center of the cover. Only if the center of gravity of the cover is somewhere else, you can indicate where this should be located in this extra option. Try to determine this as precisely as possible and enter this at this step. here
You can also operate the cover with the mouse by clicking on it and holding down the button. You will also see what happens when you raise or lower the cover. The blue arrow always shows which hand force is still needed to keep the cover in this position and in which direction. When you release the cover, it will open, close or remain in the same position. If you click on “Assembly drawing”, you can save and/or print the assembly drawing. more
Let’s take a look at the example above. The cover is held at 46 degrees. A manual force of 2.8 kg is still needed to keep the cover in that position, otherwise the cover will open further automatically. How to read the 2.8 kg from the graph? Given that 1kg = 9.81N. So 2.8 kg is 2.8 x 9.81 = 27.47 N. You can see that in the graph next to the blue square. You can ignore that in the graph it’s called -27.47N (so negative). It has been decided to call the force negative to close the cover and positive to open the cover. The blue square is on the lower blue line, because the gas spring is inserted and that it is therefore heavier than sliding out. here
Flip-Over Design Example
This type of mounting can be identified by the fact that the end at the lowest point when closed, remains in its lowest position when fully open. It can also be identified by the moving mounting point being located closer to the hinge than the fixed mounting point.
Click here to download and complete our Gas Spring Sizing Form or here to download our Gas Spring Application Enquiry Form and submit either when completing our Ask The Expert form to help our designers and engineers with your query.
Unless a means is utilised to lubricate the rod then it is advised to mount rod down, ensuring proper lubrication of the main seal in the closed position.
Gas struts are not just found on vehicles, they are also being increasingly used in many, many applications. They are being found fitted to agricultural machinery doors, boat openings, beds with under storage, caravan storage compartments- if it opens, chances are, you can fit a gas strut to it!
So here at SGS Engineering, we've created a How To video, to show How To Fit Gas Struts To Just About. Anything! In this particular video, we are 'upcycling' a piece of furniture which is a foot stool.
Gas struts are a really useful invention, and provide lifting power, a smooth gliding opening and closing, and most importantly support the weight of the opening.
Watch our video above to find out how to fit, to get some inspiration- and have a think about what you could fit gas struts to.
The important part is for the open/closed length, and the lbs of force, where the pivot points are located on the hatch and frame.
They also make push-pull scales which could measure the preasure you need, we use these at work all the time. Honestly I dont know were to get one but they are pretty simplistic. here
Okay. how about an accurate bath scale and a rod to measure the weight of the hatch while on the hinges. here