GN 1440 Telescopic Slides Steel, with Full Extension, Load Capacity up to 731 lbf

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

For the listed loading forces FS to be absorbed reliably in the surrounding structure, all available through holes of the outer and inner slide having a Ø of 6.6 mm must be used. Alternatively, holes with a Ø of 5.2 mm are available. The slotted holes, Ø 6.6 x 3.4 mm, facilitate adjustment during mounting. Failure to use mounting screws reduces the load capacity. The following screws can be used for mounting:

Designation - Standard
Socket button head screw ISO 7380
Low head socket cap 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 dampen the impact of the slide in the two end positions. 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 regards 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 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 extended position

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 the 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 cross-section and the nominal length l₁ as well as the resulting stroke l₂. Furthermore, the extension width, the slide materials used and the components of the equipment options, such as the dampened self-retracting mechanism, have a corresponding influence.
The information on the maximum load capacity of the telescopic slides was determined in endurance tests under the following conditions:

• Slide arrangement in pairs, side mount
• Observance of all mounting information
• Warp-resistant test setup
• Equal distribution of the maximum load F_S over the entire extension area
• Standard slide spacing of 450 mm
• 10,000 or 100,000 test cycles (one extension and one retraction = one cycle)
• Gradual increase of the load

Wear, performance, and maximum bending were assessed after each test section.