3Com Router 6000 Family
Installation Manual
Chapter 8
Installing B68 Cabinets
3Com Corporation
8-21
1) M12 expansion bolt 2) Outer dimensions of the cabinet
3) Cabinet rear 4) Inner wall or reference
Figure 8-24 Layout of the mounting holes and cabinet feet (multiple cabinets)
III. Drilling holes
Use a percussion drill with Φ16 bit to drill holes for bolting racks with M12 expansion screws.
When drilling holes, hold the drill handle firmly with both hands, keeping the bit perpendicular
to the floor to prevent damages to the floor or tilted holes.
All the holes must have the same depth in the range 52 mm to 60 mm (2.0 in. to 2.4 in.). Clean
the holes before measuring their net depth. After drilling a hole, use a dust collector to clean
the dust.
The bit is difficult to position on the floor that is hard and smooth. In this case, punch a small
hole on the marks for the mounting holes before drilling.
Note that the precision of marking and drilling is essential to hardware installation. Low
precision can cause many problems during installation.
Caution:
The depth of drilling is between 52 mm and 60 mm (2.0 in. to 2.4 in.). Otherwise, you
will be unable to install or fasten the expansion bolts.