GN 2404Telescopische geleiderail

Telescopische geleiderail

Telescopische geleiderail

GN 2404

Code
h1
l1 - l2
b1
b2
d1
d2
s
t
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

Rail / Runner

Heat treatable steel

  • zinc plated, blue passivated
  • Raceways hardened

Balls

Anti-friction bearing steel, hardened

Ball cage

Steel, zinc plated

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.

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

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

 
 

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.

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