This standard specifies the basic dimension series of telescopic rails (hereinafter referred to as rails) used for connecting electronic equipment racks, cabinets and plug-in boxes. This standard applies to the basic dimensions of rails used for connecting racks, cabinets and plug-in boxes specified in GJB 100 and GJB/Z 28. The rails used in civil electronic equipment can also be implemented as a reference. SJ 20742-1999 Basic Dimension Series of Telescopic Rails SJ20742-1999 Standard Download Decompression Password: www.bzxz.net

FL9910, Military Standard of Electronic Industry of the People's Republic of China
SJ 20742—1999
Series of basic dimensions of telescopic slide rails
Published on November 10, 1999
Implementation on December 1, 1999
Approved by the Ministry of Information Industry of the People's Republic of China 1 Scope
Military Standard of Electronic Industry of the People's Republic of China Basic Dimensions Series of Telescopic Slide Rails
Series of basic dimensions of telescopic slide rails
1.1 Subject Content
SJ 20742--1999
This standard specifies the basic dimension series of telescopic guide rails (hereinafter referred to as guide rails) used for connection between electronic equipment racks, cabinets and plug-in boxes.
1.2 Scope of application
This standard applies to the basic dimensions of guide rails used for connection between racks, cabinets and plug-ins specified in GJB100 and GJB28. Guide rails used in civil electronic equipment can also be implemented as a reference. 2 Reference documents
GJB/Z28-97 Basic dimension series of plug-ins and plug-ins GJB 100-86 Basic dimension series of panels, racks and cabinets GJB2825-97 Modular requirements for military radar cabinets, plug-ins and plug-ins 3 Definitions
There are no provisions in this chapter.
4 General requirements
4.1 The guide rails should be able to meet the requirements of installation on racks, cabinets and plug-ins, and ensure that the plug-ins can be pushed and pulled flexibly and reliably in the racks and cabinets. 4.2 The length, pull-out length, width and height of the guide rails can be designed according to the structural requirements and load of the product. 4.3 The installation dimensions of the guide rails must be compatible with the series holes on the racks and cabinets. 5 Detailed requirements
5.1 Basic components of guide rails
The schematic diagram of the guide rail structure is shown in Figure 1.
The Ministry of Industry and Information Technology of the People's Republic of China promulgated iKAoNrKAca on November 10, 1999
Implementation on December 1, 1999
Inner guide rails
5.2 Basic dimensions of guide rails
Middle guide rails
SJ 20742—1999
Outer guide rails and machine lock connection brackets
Outer guide rails
Plug-in padlock plate
Sketch of guide rail structure
The basic dimensions of guide rails are shown in Figure 2.
Figure 2 Basic dimensions of guide railsWww.bzxZ.net
5.2.1 Dimension series of guide rail length L 330, 380, 430, 480, 530, 580, 630, 730 mm.5.2.2 Dimension series of guide rail pull-out length L, - 2-
SJ20742-1999
360, 420, 480, 540, 600, 660, 720, 780 mm. 5.2.3 Dimension series of guide rail width B 5.2.3.1 According to the requirements of GJB 2825, the guide rail width B ≤ 13 mm. 5.2.3.2 When the guide rail width is ≥ 13 mm, the width of its active part must be less than 13 mm. 5.2.4 Dimension series of guide rail height H. The dimension series of guide rail height H is shown in Table 1.
Guide rail height (H)
40～70
Note: The guide rail height H is related to factors such as load, width, structure and material, and needs to be considered comprehensively. Additional remarks:
This standard is under the jurisdiction of China Electronics Technology Standardization Research Institute. This standard was drafted by the State-owned No. 786 Factory. Qiu Jinling.
Main drafters of this standard: Sheng Daolai Liao Lihua: Wang Yinquan
Project code: B74001.
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