SYSTEM DESIGN
South Bend Tools
For Machines Mfd. Since 9/20
Model SB1092 & SB1094
-23-
S Y S T E M D E S I G N
General
Duct Material
Always make sure there are no open flames
or pilot lights in the same room as the dust
collector. There is a risk of explosion if too
much fine dust is dispersed into the air with an
open flame present.
Always guard against static
electrical buildup by grounding
all dust collection lines.
Plastic duct generates static
electrical buildup that can cause
fire or shock. Properly ground it
to reduce this risk.
The Model SB1092/SB1094 works quite well as a
point-of-use dust collector, or for collecting dust
from up to two (Model SB1092) or four (Model
SB1094) machines simultaneously. The locking
swivel casters make it easy to move around the
shop near the machine being used.
Tips for Optimum Performance
• Avoid using more than 10' of flexible hose on
any ducting line. The ridges inside flexible
hose greatly increase static pressure loss,
which reduces suction performance.
• Keep ducts between the dust collector and
machines as short as possible.
• Keep ducting directional changes to a
minimum. The more curved fittings you use,
the greater the loss of suction at the dust-
producing machine.
• Gradual directional changes are more
efficient than sudden directional changes
(i.e. use 45° elbows in place of 90° elbows
whenever possible).
• The simpler the system, the more efficient
and less costly it will be.
You have many choices regarding main line and
branch line duct material. For best results, use
smooth metal duct for the main line and branch
lines, then use short lengths of flexible hose to
connect each machine to the branch lines.
Plastic duct is also a popular material for home
shops. However, be aware that there is a fire or
explosion hazard if plastic duct material is not
properly grounded to prevent static electrical
buildup (refer to System Grounding at the
end of this section). Another problem with using
plastic duct is that it is less efficient per foot
than metal.
Plastic Duct
The popularity of plastic duct is due to the fact
that it is an economical and readily available
product. It is also simple to assemble and
easily sealed against air loss. The primary
disadvantage of plastic duct for dust collection is
the inherent danger of static electrical buildup.
Figure 27. Examples of plastic ducting components.
