108
Dukane Manual Part No. 403–566–01
DPC
™
II Plus and EZ Welder System – User’s Manual
Attaching The Mounting
Stud To A Horn Or A Booster
1. Inspect the stud for cracks or damaged threads.
Replace the stud if it is cracked or otherwise
damaged.
2. Remove any foreign matter from the threaded
stud and the mating hole.
3. Thread the mounting stud into the input* end
of the horn or the input* end of the booster
and tighten to the following torque specifica-
tions using an allen wrench in the socket head
of the mounting stud. Table 10—I lists the
torque specifications in units for both English
and Metric systems of measurements. Figure
10–5 is a handy conversion graph if you require
intermediate values not listed in the tables.
DO NOT hold the booster by the mounting
rings when tightening stud. The mounting rings
have a shear pin which could snap under ex-
cessive torque. Use a spanner wrench (on horns
with spanner wrench holes) or an open end
wrench (on horns with wrench flats) to keep
the horn or booster from turning in your hand.
• 70 inch-lbs for an 8mm threaded stud
• 100 inch-lbs for a 3/8" x 24 threaded stud
• 160 inch-lbs for a 1/2" x 20 threaded stud
*
Always assemble the mounting studs that mate boost-
ers, transducers and horns to the input end of the
horn or the input end of the booster first. This is
shown in Figures 10–6 and 10–7.
NEVER thread a stud into the transducer or the out-
put end of the booster first. See Booster Notes in
this section for correctly identifying the output end
of a booster.
inch–lbs ft–lbs N–m
70 5.8 7.9
100 8.3 11.3
160 13.3 18.1
Table 10—I Stud Torque Unit Conversions
NOTE
Do not apply any grease to the stud threads or
the tapped hole. This may cause the stud to
loosen. If the stud wanders within the joint, it
can vibrate, resulting in excessive heat. In some
cases, this can melt the tooling material.
NOTE
To convert inch-lbs to ft-lbs, divide by 12
To convert inch-lbs to Nm, divide by 8.852
To convert ft-lbs to Nm, multiply by 1.356
To convert Nm to ft-lbs, multiply by 0.7376
Torque specifications have a tolerance of about
± 10%.
See Figure 10–4 for a handy conversion graph.
