GN 1404

Type

Type E: with rubber stop, locking device in back

Identification no.

No. 3: Fastening using through-holes on external slide and countersunk holes on inner slide

Slide profile

Steel, zinc plated, blue passivated ZB

Bearings

Roller bearing steel, hardened

Ball cage

Steel, zinc plated

Rubber stop

Plastic / Elastomer

Operating temperature -20 °C to 100 °C

Telescopic slides GN 1404 are installed vertically and in pairs. The stroke reaches ≈ 75 % of the nominal length l1 (partial extension). The rubber stops of type E dampen the impact of the slide in the two end positions and takes on the locking function of the back stop position. This feature is noticeable through a slight resistance on opening and closing. If larger static or dynamic loads occur in the direction of extension, they should be absorbed by external stop elements.

The telescopic slides are delivered in pairs. They can be installed on the extension on either the left or right side due to the mechanics. All mounting holes are easy to reach without auxiliary holes. Only the mounting holes are shown, but other production-related holes may be present.

  • other lengths and hole spacing
  • other attachment options
  • with rubber stop (without locking device)
  • other surfaces
  • with support bracket
  • with retraction dampening, external

Mounting holes - outer slide

 
l1a2a3a4a5a6
300135199231--
350135231263--
400135295327--
450135327359--
500167295327391423
600167359391487519
700199391423583615

Mounting holes - inner slide

 
l1i2i3i4
30072136168
350104168200
400104200264
450104200296
500136232328
600168296424
700168328520

Fastening screws

For the said loading forces FS to be absorbed reliably in the surrounding structure, all available through-holes of the outer and inner slide must be used. Failure to use fastening screws reduced the specificed load capacity accordingly. The following screws can be used for mounting:

Designation - standardOuter slideInner slide
Countersunk screw, Phillips | DIN 965M 5M 5
Countersunk screw, Phillips | DIN 7997Size 5Size 4.5

General information

Telescopic slides offer smooth running, wear-free, and quiet linear motion. They are used in a very wide range of applications. The spectrum ranges from the most simple extensions and drawers to high-quality variants that are used in the industrial environment on machines, production systems, and equipment. The telescopic slides have a multitude of positive features and are still very interesting from an economic standpoint. Here are a few examples of use: sliding doors, protective hoods, keyboards and PC pullouts, vehicle equipment, storage shelves, battery boxes etc.

Telescopic slides can come with a number of component options. Some are available for one of the two stop positions and in combination, and they are defined by the type in the article number.

Structure

Telescopic slides consist of an outer and inner slide as well as additionally of one or two middle slides depending on design and/or required extension lengths. The slides are interconnected through appropriately shaped geometry and move by means of ball bearings. A ball cage keeps the bearings spaced and in position.

The slides are usually mounted through countersunk holes or through-holes. Other options, such as threaded bolts or support brackets, are available as an alternative.

In regard to the length of the extension, telescopic slides can be divided into three categories: partial extension, full extension, and over extension. The categories are defined by the achievable stroke l2, which is listed in relation to the nominal length l1.

Type of extensionExtension diagram
Partial extension: l1 = 100 % -> l2 = min. 75 %____logo__1420_PG-16615-0__
Full extension: l1 = 100 % -> l2 = min. 100 %____logo__1420_PG-16617-0__
Over extension: l1 = 100 % -> l2 = min. 150 %____logo__1420_PG-16619-0__

All slides have internally constructed stops in the front and back end position. The stops prevent the slides from extending unintentionally. Depending on the available installation space and required stability, the stops are designed accordingly in a metallic form or with additional plastic or elastomer parts as a rubber stop to prevent the slides from hitting the end positions with too much force.

Also the telescopic slides can come with a variety of accessory functions. Examples include locking devices, latches, detach functions, and self-retracting mechanisms, some of which are dampened. Some additional functions are available, depending on slide variant, for the back or front stop position and in combination. Furthermore, customer-specific modifications regarding the fastening of the slides can be made.

Telescopic slides with full extension, back stop position

 

Telescopic slides with full extension, front stop position

 

StandardType of extensionLoad capacityBasic lengthMaterialFastening--
Partial extension Tper pair at 10,000 cyclesretracted positionSteel STThrough-holesCountersunk holesOuter slide, through-holes/ Inner slide, countersunk holes
Full extension |b bb|in Nin mmSt. Steel NI(Id. no. 1)(Id. no. 2)(Id. no. 3)
GN 1400T280300 - 500STX--
GN 1404T780300 - 700ST--X
GN 1408V250250 - 700STX--
GN 1410V510250 - 800STX--
GN 1412V430300 - 700STX--
GN 1414V360300 - 650STX--
GN 1418V430350 - 650STX--
GN 1420V1290300 - 1200ST-X-
GN 1422V1290300 - 800ST-X-
GN 1424V750350 - 700ST-X-
GN 1426V1380500 - 800ST-X-
GN 1430V2120400 - 1200ST-X-
GN 1432V2300400 - 800ST-X-
GN 1440 | Type BV3250300 - 1500STX--
GN 1440 | Type MV3250300 - 1500STX--
GN 1440 | Type KV3250300 - 1500STX--
GN 1440 | Type QV3250300 - 1500STX--
GN 1450V510300 - 600NIX--
GN 1460V1050250 - 800NI-X-

StandardComponent features
without rubber stopwith rubber stop, back-frontLocking device backLocking device back, detach functionLatch backLatch frontLatch back-frontSelf-retracting mechanism, dampened / not dampenedPush to open - mechanismExtension on both sides
Type |bbb|Type FType MType KType Q
GN 1400X---------
GN 1404-XX-------
GN 1408-X-X------
GN 1410-X-X------
GN 1412-X-X---X--
GN 1414-X-X---X--
GN 1418-X-X----X-
GN 1420-XX-------
GN 1422-X-----X--
GN 1424-X-----X--
GN 1426-X-------X
GN 1430-XX-------
GN 1432-X-----X--
GN 1440 | Type B-X--------
GN 1440 | Type M-X--X-----
GN 1440 | Type K-X---X----
GN 1440 | Type Q-X----X---
GN 1450-X-X------
GN 1460-X-X------

General installation information

Follow the installation information below when mounting telescopic slides. Ideally this information should have already been taking into account in the design of the extensions. Doing so ensures smooth running, quiet, and low-wear operation of the slides over a long period of time and guarantees function in the long run.

  • Telescopic slides are generally installed in pairs so that the mounting surfaces of the housing and extension side are level, parallel, and perpendicular and have to be aligned with one another correctly in regard to position. Furthermore attention should be given to adequate stability of the receiving structure so as to keep geometric errors caused by elastic deformation as minimal as possible.
  • Fastening holes should be applied in such a way that excludes twisting or warping of the slides during mounting. Also the slides need to be positioned in the direction of extraction in such a way that the extensions reach the end position at the same time on retraction and extraction. In this way, an equal amount of stress acts on the rubber stops and locking devices.
  • The width of the respective slide installation spaces should be designed with a tolerance of +0.2 / +0.5 mm. The slides will then tension slightly in the direction of the middle of the extension. This promotes optimum performance and a long lifespan.
  • Before mounting, the inner slides should be moved to the front and back stop position once to allow the ball cages to assume their intended position. Installation should also take place at room temperature.
  • After mounting, check the telescopic slides and extensions for ease of movement. If something is wrong, such as sticking or warping, the cause has to be determined and eliminated through appropriate actions.

Mounting holes, fastening screws

In general use all holes intended for fastening when mounting telescopic slides. Doing so will ensure that the forces resulting from the maximum load capacity FS (nominal load) can be transferred safely from the telescopic slides from and to the surrounding structure. Failure to use fastening screws reduces the specified load capacity accordingly.

The outer and inner slides have other openings and auxiliary holes in addition to the holes intended for mounting. The catalog drawings and the CAD data available for download do not show these holes to exclude confusion and design faults. These holes are needed, among other things, for the fastening of type-dependent component features, such as the self-retracting mechanisms.

Some slide variants have fastening options for screws of various sizes. In this case, all positions of a size or type should be used. Auxiliary holes, which ensure that all mounting holes can be reached, are found accordingly in the CAD data, but are not pictured in the catalog drawings.

The type and specification of suitable screws can be found on the respective catalog pages. It is generally recommended to use screws of tensile strength class 8.8 under consideration of the specified tightening torque.

Installation position

Telescopic slides are preferably installed arranged vertically and in pairs in a horizontal position. This ensures that the highest possible stability and torsional stiffness is reached in the smallest installation spaces and allows for absorption of the maximum load (nominal load). The performance features are optimum in this installation position, and wear is reduced to a minimum.

The horizontal or lying installation of the slide is likewise possible with certain restrictions. The maximum load in this case is only about 20 % to 25 % of the specified nominal load. The less favorable slide profile results, therefore, in considerably higher bending in the extended state. As a result, the ball cages may leave streaks on the heads of the fastening screws. In case of doubt, check the function under load in a test set-up.

Installing slides in a perpendicular position to the direction of extraction is not recommended because increased cage slip occurs in this case. This means that the upper and lower end position of the slide can be reached in some circumstances only with an increased amount of force after a few cycles since the force of gravity causes the ball cage to become dislocated from its correct position.

The following examples show possible installation positions of telescopic slides that are considered favorable or acceptable and some that are regarded as unfavorable and should, therefore, be avoided.

favorablevertically, both sides, favorable
____logo__1420_MT-16647-0______logo__1420_MT-16649-0__
acceptablevertically shifted, on both sides, acceptablevertically inclined, on both sides, acceptable
____logo__1420_MT-16651-0______logo__1420_MT-16653-0__
unfavorablevertically, on one side, unfavorablehorizontally, on both sides, unfavorable
____logo__1420_MT-16655-0______logo__1420_MT-16657-0__

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