Telescopic Rail Kit

QM87xx 1U HDR 200Gb/s InfiniBand Switch Systems User Manual

The telescopic rail kit is not included in the system’s package, and can be purchased separately.

There are two installation kit options:

  • Standard depth systems should be mounted using the standard rail kit.

  • Short depth systems can be mounted using either of the rail kits.


Legacy Kit OPN

Rack Size and Rack Depth Range



600-800 mm

The following parts are included in the rail kit package (see figure below):

  • 1x Right side slider (A)

  • 1x Left side slider (B)

  • 2x Rear rail (C)

  • 2x Front rail (D)

  • 10x M6 Standard cage nuts¹ ² (E)

  • 10x M6 Standard pan-head Phillips screws¹ (F)

  • 2x Phillips100 DEG F.H TYPE-I ST.ST 6-32 X 1/4 screw with around patch (G)

  • 6x Flat head 100 DEG Phillips 4-40X3/16" ST.ST patch screws (H)

¹ Other threads are available by special order: M5, 10-32, 12-24
² G-type cage-nut is available by special order.

Rack Rail Kit Parts




The rails must be separated prior to the installation procedure.

To separate the rails:

  1. Separate rail C from sliders A/B + D.

  2. Extend the rail assembly by pulling the extension outwards (D).

    Rails Separation


Before mounting the system to the rack, select the way you wish to place the system. Pay attention to the airflow within the rack cooling, connector and cabling options.

While planning how to place the system, review the following points:

  • Make sure the system airflow is compatible with your installation selection. It is important to keep the airflow within the rack in the same direction.

  • In case there are cables that cannot bend within the rack or in case more space is needed for cable bending radius, it is possible to recess the connector side or the FRU side by 3.15” (8cm) by optional placement of the system’s rails.

  • The FRU side is extractable. Mounting the sliding rail inverted to the system will allow you to slide the FRU side of the system, in and out.

To mount the system into the rack:

  1. Install 10 cage nuts (E) into the desired 1U slot of the rack: 4 cage nuts in the non-extractable side and 6 cage nuts in the extractable side.

    Installing the Cage Nuts


  2. Mount both of the outer rails (C+D) into the rack (as illustrated below), and use 8 standard pan-head screws (F) to fix them to the rack. Do not tighten the screws yet.

    Mounting the Outer Rails into the Rack


  3. If cable accommodation is required, disassemble any of the inner rails from the brackets attached to them, by removing and scraping the connecting screws.

    Disassembling the Inner Rails for Cable Accommodation


  4. Route the power cable through either of the inner rails, and reassemble the brackets by screwing the 3 screws (per rail) provided with the rail-kit (H) with a torque of 0.7±0.05Nm.

    Cable Accommodation


  5. Secure the chassis in the inner rails screwing the 2 flat head Phillips screws (G) in the designated points with a torque of 1.5±0.2 Nm.

    Securing the Chassis in the Inner Rails


  6. Slide the switch into the rack by carefully pushing the inner rails into the outer rails installed on the rack.

    Sliding the Switch into the Rack


  7. When fully inserted, fix the switch by closing the remaining 2 screws in the middle and tightening the 8 screws inserted in Step 2 with a torque of 4.5±0.5 Nm.

To remove a unit from the rack:

  1. Turn off the system and disconnect it from peripherals and from the electrical outlet.

  2. Unscrew the two M6 screws securing the front of the inner rails’ ears to the outer rails and to the rack.

  3. Pull the unit out until braking is felt. For safety purposes, the locking mechanism will not allow a complete removal of the unit at this stage.

    Pulling the Unit Outwards


  4. Press on the locking spring (appears in red in the figure below) on both sides simultaneously, and continue pulling the unit towards you until it is fully removed.

    Locking Mechanism


© Copyright 2023, NVIDIA. Last updated on Jan 7, 2024.