-30-
Model W1867/W1868/W1869 (For Machines Mfd. Since 11/18)
SE
TU
P
Determine.Required.CFMs
Figure.42.
CFM requirements labeled for each
machine.
400
400
600
850
400
250
100
Table Saw
Planer/
Moulder
Miter
Saw
Jointer Sander
Planer
Shaper
Dust
Collector
3.
Directional changes should be kept to a
minimum. The more directional change
fittings you use directly increases the
overall resistance to airflow.
4.
Gradual directional changes are more
efficient than sudden directional changes
(i.e. use the largest corner radius possible
when changing hose or pipe direction).
5.
Each individual branch line should have a
blast gate immediately after the branch
to control suction from one machine to
another.
6.
The simpler the system, the more efficient
and less costly it will be.
Since each machine produces a different amount
of sawdust, the requirements for the minimum
amount of CFM to move that sawdust is unique
to the machine (for example, a planer produces
more sawdust than a table saw). Knowing this
required CFM is important to gauging which size
of duct to use.
Refer to the figure below for a close estimation
of the airflow each machine requires. Keep in
mind that machines that generate the most
sawdust should be placed closest to the dust
collector. If the machine has multiple dust ports,
the total CFM required is the sum of all ports.
If the machine does not have a built-in dust port,
use the following table to determine which size
of dust port to install.
Figure.41..
Dust port size and quantity per
average machine.
Machine..................Average.Dust.Port.Size
Table Saw ........................................ 4"
Miter/Radial-Arm Saw .......................... 2"
Jointer (6" and smaller) ....................... 4"
Jointer (8"-12") .................................. 5"
Thickness Planer (13" and smaller) .......... 4"
Thickness Planer (14"-20") ..................... 6"
Shaper ............................................ 4"
Router (mounted to table) .................... 2"
Bandsaw .......................................... 4"
Lathe .............................................. 4"
Disc Sander (12" and smaller) ................. 2"
Disc Sander (13-18") ............................ 4"
Belt Sander (6" and smaller) .................. 2"
Belt Sander (7"-9") .............................. 3"
Edge Sander (6" x 80" and smaller) .......... 4"
Edge Sander (6" x 80" and larger) ............ 5"
Drum Sander (24" and smaller) ...........2 x 4"
Drum Sander (24" and larger) .............4 x 4"
Widebelt Sander (18" and smaller) ........... 5"
Widebelt Sander (24"-37" single head) ..2 x 6"
Widebelt Sander (24"-51" double head) .5 x 4"
Write the required CFM for each machine on
your sketch, as shown in the
Figure
below.
Machine.
Dust.Port.Size
Approximate.
Required.CFM
2"
100
2.5"
150
3"
250
4"
400
5"
600
6"
850
7"
1200
8"
1600
9"
2000
10"
2500
Figure.40..
Approximate required air flow for
machines, based on dust port size.
Summary of Contents for W1867
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