Changzhou Colewell Machinery Co., Ltd.

All gas springs contain a small amount of oil to lubricate the main seal and rod. This oil also provides end of stroke damping.

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 millimetres 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, an oil chamber or a fully damped gas spring should be specified. While these additional features add to the spring cost, they will enable your gas springs to reach their maximum operational life.