Installing Ball Bearing Guide Rails (for High-Density Disk Enclosures)

Prerequisites

The following installation tools and materials are ready:

• M3 to M6 Phillips screwdriver
• Marker
• M6 screw
• M4 screw
• M3 screw
• Installation templates
• Ball bearing guide rail components (including ball bearing guide rails, M3 screws, M4 screws, M6 screws, and installation templates)

Context

• High-density disk enclosures must be installed on ball bearing guide rails. Stacking the enclosures will cause damage.
• Ball bearing guide rails must be installed horizontally.

Before performing the installation, you are advised to count several U scales upward from the position of the first scale at the bottom of the mounting bar, and then mark the position to ensure that the front and rear heights of the ball bearing guide rails are the same.

• You are advised to install storage devices in the cabinet from bottom up.
• Configure a pair of ball bearing guide rails for each high-density disk enclosure.
• The ball bearing guide rails can be extended from 600 mm to 915 mm.

Procedure

1. Pull out the inner rail of the ball bearing guide rails, as shown in Figure 5-46.
   1. Pull out the inner rail until the buckle is exposed.
   2. Press the buckle and pull out the inner rail from the ball bearing guide rail. See step (2) in Figure 5-46.

   Put the removed inner rail into an ESD bag. The inner rail will be used in installing a high-density disk enclosure.

   Figure 5-46 Pulling out an inner rail
   

   For the right ball bearing guide rail, press the buckle downward. For the left ball bearing guide rail, press the buckle upward.

2. Pull out the rail bracket of a ball bearing guide rail, as shown in Figure 5-47.
   1. Loosen the four M3 screws on the ball bearing guide rails shown in (1) of Figure 5-47.
   2. Remove the rail bracket, as shown in (2) of Figure 5-47.

   The rail bracket will be used to fix the cable tray.

   Figure 5-47 Removing a rail bracket
   

3. Install the left inner rail (identified by L) of the ball bearing guide rails.
   1. Loosen the two M4 screws on the external rail of the ball bearing guide rail, adjust the length of ball bearing guide rail.
      Figure 5-48 Loosening screws
      

      Align the ball bearing guide rails with the mounting bar of the cabinet in advance. If the distance is not longer than 10 mm between the front and rear brackets of the ball bearing guide rails and the front and rear ends of the mounting bar, loosen the two M4 screws on the external rail of the ball bearing guide rail (pull out the middle guide rail to expose the two M4 screws on the ball bearing guide rail), as shown in Figure 5-48. If the distance is longer than 10 mm, remove the two M4 screws and align the distance.

   2. Align the bottom edge of the ball bearing guide rail with the integer U scales on the front mounting bar, and insert the front positioning pins of the ball bearing guide rail into the square holes. Use M6 screws to fix the front bracket of the ball bearing guide rail, as shown in Figure 5-49.
   3. Stretch the rear bracket of the ball bearing guide rail and insert the rear positioning pins into the square holes of the rear mounting bar. Use M6 screws to secure the guide rail in place, as shown in Figure 5-49.
      Figure 5-49 Installing a ball bearing guide rail
      

   4. Fasten the two M4 screws on the ball bearing guide rail, as shown in Figure 5-50.
      Figure 5-50 Fastening screws
      

4. Install the right inner rail (identified by R) of the ball bearing guide rails.

   The installation method of the right inner rail is similar to 3.

5. Install the ball bearing guide rail bracket, as shown in Figure 5-51.
   1. Install the rail bracket and slide the bracket to the ball bearing guide rail. See step (1) in Figure 5-51.
   2. Fasten the four M3 screws on the ball bearing guide rail. See step (2) in Figure 5-51.

   Fasten two screws at the top and bottom of the bracket of the ball bearing guide rail, respectively.

   Figure 5-51 Installing a ball bearing guide rail bracket
   

6. After the installation, use the installation templates to check the distance between the left and right guide rails, and ensure that the template can snatch into the ball bearing guide rails, as shown in Figure 5-52.

   If the installation templates cannot snatch into the guide rails, loosen the M6 screws on the guide rails and mounting bars, and slightly adjust the distance between the left and right guide rails. After the installation templates successfully snatch into the guide rails, fix the M6 screws.

   Figure 5-52 Inserting installation templates
   

7. Check the installation of the ball bearing guide rails.
   1. In front of the cabinet, check whether the ball of the ball bearing guide rail is placed at the most front end of the middle rail. If not, slide it to the most front end of the middle rail, as shown in Figure 5-53.
      Figure 5-53 Sliding the ball to the most front end of the middle rail
      

   2. Check whether the middle rail of the ball bearing guide rail is completed inserted, that is, the edges of the middle rail and external rail are at the same vertical plane, as shown in Figure 5-54.

   If the middle guide rail is not in place, high-density disk enclosures may fail to be pushed in or pulled out smoothly later. Release the inner rail latch to push the rail into the guide rail.

   Figure 5-54 Sliding the middle rail to align it with the edges of the external rail