Side Inserts -- When using the installation points on the sides of the cabinet, you must use the
bevel washers that come included with the loudspeaker. These washers provide a uniform flat
surface for the shoulder of the bolt and also compensate for the draft (angle) of the sidewalls of
the cabinet. In this application, the thread length must be longer to reach through the washer,
while not “bottoming out”. The shaft should be 25.4 mm (1 inch). See Figure 3:
For side inserts, use 6 mm x 1mm
pitch x 25.4 mm thread length
steel forged shoulder eyebolt.
CAUTION
Installation must only be done by qualified persons using safe
rigging practices. Load eyebolts in accordance with the eyebolt
manufacturer’s loading guidelines.
For additional information, refer to JBL Professional’s Tech Note
Vol 1 #14, “Basic Principles for Suspending Loudspeakers”
Eyebolt Sources -- These sizes of forged shoulder steel eyebolts are available from a wide
variety of industrial hardware suppliers, or directly from JBL Professional:
EB-6X12 = 6 mm x 1mm pitch x 12 mm thread length, forged shoulder steel eyebolt, load
rated.
EB-6X25 = 6 mm x 1 mm pitch x 25.4 mm thread length, forged shoulder steel eyebolt, load
rated.
EYEBOLT APP 08/05
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