GN 1440-QL Telescopic Slides With rubber stop, latch in back and in front, left

Telescopic slides GN 1440 are installed vertically and in pairs. The stroke reaches ≈100 % of the nominal length l₁ (full extension). Patented plastic ball cages ensure extremely smooth running of the slide.

Telescopic slides of various types, for example, with and without latch, can be combined freely, which is why GN 1440 is delivered as a single unit and not in pairs. Due to the symmetrical mechanical design, the types B and K can be mounted on either the left or right side of the extension.

All mounting holes are easy to reach through auxiliary holes. Only the mounting holes are shown, but other production-related holes may be present.

* The bore is only usable on types B and K. | ** The bore is only usable on types B, MR and ML.

For the said loading forces F_S to be absorbed reliably in the surrounding structure, all available through-holes of the outer and inner slide having a diameter (Ø) of 6.6 must be used. Alternatively, holes with a diameter (Ø) of 5.2 are available. The elongated holes, Ø 6.6 x 3.4, facilitate adjustment during mounting when needed. Failure to use mounting screws reduces the load capacity. The following screws can be used for mounting:

The rubber stops dampen the impact of the slide in the two respective end position. This feature minimizes noise development and increases the service life. Attached to the slides in a partially concealed, partially visible manner, the stops meet each of the requirements in regard to shape, material, and hardness.

If larger static or dynamic loads occur in the direction of extension, they should be absorbed by additional end stops.

Types MR / ML are used in applications in which the slide needs to be locked in the back end position. This feature prevents the slide from extending on its own, for example due to an inclined position. If larger loads occur in the direction of extension in the latched position, they should be absorbed by additional latch elements.

When closed, the latch mechanism locks into place under spring load via a recess on the outer rail. Pressing the release lever releases the inner and middle slide for extension. Back in the retracted position, the mechanism automatically locks into place again via the recess on the outer slides by moving over a ramp.

Type K is used when the extension is to remain in the extended position for a certain amount of time. This feature allows maintenance work to be performed with the slide being extended, for example. If larger loads occur in the latched position, they should be absorbed by additional latch elements.

For the function to be activated, the slide has to be fully extended to the front, where it will automatically lock into place via a pretensioned latching lever. Pressing the lever releases the slide, allowing slide to retract again.

Types QR / QL combine the features of types MR, ML and K. The inner and middle slide lock into place in the two end positions.

In contrast to the locking of type K, types QR / QL are operated via an internal linkage. Pressing the green release lever activates the locking rocker, releasing the slide rail for retraction or extension.