GN 1440 Telescopic Slides Steel, with Full Extension, Load Capacity up to 3250 N

• 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 fastening screws reduces the load capacity. The following screws can be used for mounting:

Hexagon socket button
head screw ISO 7380
Hexagon socket low cylindrical
head screw DIN 7984 / DIN 6912

Outer slide
M 5 / M 6
M 5

Inner slide

M 5 / M 6

M 5

Type B with rubber stop

The rubber stops of type B dampen the impact of the slide in the respective end position. This feature minimizes noise development and increases the lifespan. 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 external stop elements.

Types MR / ML with rubber stop, latch in retracted position

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 with rubber stop, latch in front

Type K is used when the extension needs to stay in the front stop position for a certain amount of time. This feature allows maintenance work to be performed when the extension is expanded, for example. If larger loads occur in the latched position, they should be absorbed by external latch elements.
For the function to be activated, the slide has to be fully extended to the front, where it will automatically click into place through a pretensioned locking lever. Pressing the lever releases the slide, allowing slide to retract again.

Types QR / QL with rubber stop, latch in extended and retracted position

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.

The maximum load capacity of telescopic slides depends on the slide profile, the nominal length l₁, and the resulting stroke l₂. Furthermore, the extension width, the slide materials used, and the parts of the component options, such as the dampened self-retracting mechanism, have a considerable influence.
The information on the maximum load capacity of the telescopic slides was determined in fatigue tests under the following conditions:

• Slide arrangement vertical in pairs
• Observance of all mounting information
• Warp-resistant test set-up
• Equal distribution of the load F_S throughout the extension finish
• Standard slide spacing of 450 mm
• 10,000, 50,000 or 100,000 test cycles
  (one extraction and retraction = one cycle)
• Gradual increasing of load

Wear, performance, and maximum bending were assessed after every test segment.