GN 2404 Telescopic linear slides with partial extension


  • RoHS

Description

Specification

Rail / Runner
Heat treatable steel
  • zinc plated, blue passivated
  • Raceways hardened
Balls
Anti-friction bearing steel, hardened
Ball cage
Steel, zinc plated

Information

Telescopic linear slides GN 2404 are used, for example, for storage drawers and sliding doors, or in jigmaking for a sliding motion in a linear direction.
If the support screw is removed on both sides, the sliding distance extends the length of the rail plus an additional distance of slightly more than half the length of the rail.
External elements should limit the maximum sliding distance; the supports of the rail have been designed to guard against the inadvertent extraction of the runner from the rail.

On request

  • other lengths (based on the standard lengths grid dimension of 80 mm)
  • Special lengths (bore, start and end distances)

Technical information

Structure

All linear slides consist of an outer rail with a runner moving inside. Anti-friction bearings, kept at a distance and in position by means of a ball cage, lie between the rail and the runner. Rail and runner are made of heat treatable steel, enabling their use in industrial environments with higher requirements in terms of load rating, quiet operation and useful service life.
All designs are available in the nominal rail dimensions h1 = 28, 35 and 43 mm and may also be supplied beyond the standard range in lengths from 130 mm to 1970 mm, appropriate for individual requirements.
Linear slides are normally adjusted so that a clearance-free (i.e. moderately pre-stressed) match-up is created between rail and runner. The raceways of the rails and runners are induction hardened, which combined with the antifriction bearings results in lower wear and longer service life. Linear slides are permanently lubricated with a high-grade special grease designed for linear guide rail systems.
Depending on requirements, a variety of different types are available. Sliding distances of the runners are inside, partly outside or entirely outside the length of the rails. Fully extendable telescopic linear slides consist of linear slides directly interconnected at the rails, the runners or with the help of an intermediate profile.
To mount linear slides, countersinks in the rails and, depending on type of construction, threaded or countersunk holes in the runners are available. The compact style is generally advantageous for use in tight spaces.

Types

Telescopic linear slides with partial extension

Assembly examples

Load rating of telescopic linear slides

When selecting a suitable linear slide, it is primarily the available space, the desired stroke and the load carried which must be taken into consideration. The values listed below are intended as guidelines for selecting the most suitable nominal rail size.
The details on load rating are non-binding guide values given without liability and does not constitute any type of guarantee or warranty of its intended use. The user must determine in each individual case whether a product is suitable for the intended application. Environmental factors and aging may affect the stated values.

DescriptionLoad rating-Permissible load torques--
-Co rad in NCo ax in NMx in NmMy in NmMz in Nm
GN 2404-28-130645452302317
GN 2404-28-2101165816866027
GN 2404-28-2902015141019013541
GN 2404-28-3702540178030921552
GN 2404-28-4503065214554031664
GN 2404-28-5303595251562543574
GN 2404-35-2902100147021815556
GN 2404-35-3702685188034824769
GN 2404-35-4503270228551536580
GN 2404-35-53043503045787553101
GN 2404-35-610493034501025722113
GN 2404-35-690551038601295914125
GN 2404-43-37035402480444313119
GN 2404-43-45049053435735514151
GN 2404-43-530630544151090766184
GN 2404-43-6107725541015251065210
GN 2404-43-6908185573018501295240
GN 2404-43-7709490653024051685273
No details on the permissible load torques are given for the telescopic linear slides as these are normally used for paired applications. Loads of these dimensions occur to a minor degree because it may be assumed that the surrounding construction has sufficient rigidity and stiffness. Transferring load torques within certain limited is permitted.

Static load and deflection

The load values given in the tables refer to a maximum permissible force allowed to act in the middle of the fully extended profile rail at the third segment.
If the given values are observed and if the telescopic linear slide is fully extended, a minor deflection (sag) occurs at the end of the runner or of the rail. This has normally no detrimental effect on the proper function of the application. If required, guide values may be given if requested.

Mounting screws, assignment of the mounting holes

The standard mounting hardware is DIN 7991-10.9 countersunk head screws, to be mounted with the recommended tightening torque. Depending on type, not all mounting holes may be utilized. In general, these holes can be left unused. In exceptional cases, especially in bilateral stroke, mounting holes can be accessed by loosening the support screws and by pulling out the runner. The support screws are then put back in place.

Traversal speed, cage slip

The traversal speed in linear slides can be as much as 0.8 m/s. The particular application and the installation length can have an effect on this value. In the event of rapid changes of direction and high accelerating forces, cage slip may occur in some cases, especially in long ball cages. In cases such as these, the cage does not move synchronously with half the speed of the runner, but gradually loses its correct position owing to the slip. Whenever possible, running a blank stroke to the end of the traversal distance should be provided for back positioning.
Telescopic linear slides with partial extension GN 2404
GN 2404
Filter
Description h1 l1 - l2 b1 b2 d1 d2 s t Weight
GN 2404-28-130 28 130 - 74 12.3 12.9 M 5 5.5 4 7 290
GN 2404-28-210 28 210 - 116 12.3 12.9 M 5 5.5 4 7 460
GN 2404-28-290 28 290 - 148 12.3 12.9 M 5 5.5 4 7 640
GN 2404-28-370 28 370 - 190 12.3 12.9 M 5 5.5 4 7 810
GN 2404-28-450 28 450 - 232 12.3 12.9 M 5 5.5 4 7 990
GN 2404-28-530 28 530 - 274 12.3 12.9 M 5 5.5 4 7 1170
GN 2404-35-290 35 290 - 159 16.5 17 M 6 6.5 3.5 10 900
GN 2404-35-370 35 370 - 203 16.5 17 M 6 6.5 3.5 10 1110
GN 2404-35-450 35 450 - 247 16.5 17 M 6 6.5 3.5 10 1350
GN 2404-35-530 35 530 - 279 16.5 17 M 6 6.5 3.5 10 1590
GN 2404-35-610 35 610 - 323 16.5 17 M 6 6.5 3.5 10 1830
GN 2404-35-690 35 690 - 367 16.5 17 M 6 6.5 3.5 10 2070
GN 2404-43-370 43 370 - 208 21 22 M 8 8.5 4.5 13.5 1920
GN 2404-43-450 43 450 - 243 21 22 M 8 8.5 4.5 13.5 2340
GN 2404-43-530 43 530 - 278 21 22 M 8 8.5 4.5 13.5 2760
GN 2404-43-610 43 610 - 313 21 22 M 8 8.5 4.5 13.5 3170
GN 2404-43-690 43 690 - 363 21 22 M 8 8.5 4.5 13.5 3590
GN 2404-43-770 43 770 - 398 21 22 M 8 8.5 4.5 13.5 3730