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Table 17. Static and sliding rails
Sliding and static rail
Product
Rail identifier Mounting
R640
B6
B4
Screws are not included in either kit as threaded racks are offered with various thread designations. Users must therefore provide their own
screws when mounting the rails in threaded racks.
NOTE:
Screw head diameter for the sliding rails must be 10 mm or less.
Other key factors governing proper rail selection include the following:
•
Spacing between the front and rear mounting flanges of the rack
•
Type and location of any equipment mounted in the back of the rack such as power distribution units (PDUs)
•
Overall depth of the rack
The static rails offer a greater adjustability range and a smaller overall mounting footprint than the sliding rails. This is because of their
reduced complexity and lack of need for CMA support.
Table 18. Static rails adjustability
Product
Rail
Rail type
identifier
R640
B6
Sliding
B4
Static
The adjustment range of the rails is a function of the type of rack in which they are being mounted. The Min/Max values listed above
represent the allowable distance between the front and rear mounting flanges in the rack. Rail depth without the CMA represents the
minimum depth of the rail with the outer CMA brackets removed (if applicable) as measured from the front mounting flanges of the rack.
Rail type
interface
ReadyRails II
Sliding
ReadyRails
Static
Rail adjustable range (mm) Rack types supported
Square
Min
Max
630
883
608
879
Rack types supported
4-Post
Square
Round
√
√
√
√
Round
Threaded
Min
Max
Min
616
876
630
594
872
604
2-Post
Thread
Flush
√
X
√
√
Rail depth—mm
Without
CMA
Max
897
714
890
622
Rack rails
Center
X
√
With CMA
845
N/A
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