Gas Spring & Strut Mounting Instructions
All gas springs contain a small amount of oil to lubricate the main seal and rod. This oil also provides end of stroke damping. If standard gas springs are operated and mounted in a rod-up orientation, fluid cannot reach the main seal or rod which leads to excessive seal wear and reduced life. It is recommended that standard gas springs be mounted rod down at least 30 degrees off horizontal. If the application cannot accommodate rod-down mounting, an oil or grease chamber should be specified. Both are optional features.
Why should springs be used rod-down ?
In order to keep the rod seal lubricated, a small amount of oil is used in every gas spring. When used rod-down, the oil is kept in contact with the rod seal which improves the sealing properties and ensure the seal will never become dry.
For this reason, one of the basic recommendations when incorporating gas springs in your design is to make sure they are used at an angle of less than 60 degrees from the vertical.
The oil used in the gas spring is also useful to obtain a high damping effect on the last few millimeters of the stroke. If the gas spring was not used rod-down, the piston would not have to go through the oil at the end of the extension and no damping effect would occur.
When this is not possible and the gas spring has to be used either rod-up or near horizontal, we specify an oil chamber or a fully damped gas spring. While these solutions are not as economical as standard gas springs, they will ensure your gas springs will last as long as a standard gas springs used with the rod facing down.
Example of a fully damped gas spring:
Click here to submit a Request for Quote
or call us today at 800.214.7034