Specifications

65
AIR SUPPLY HOSE RECOMMENDATIONS
Air Motor SCFM Hose and Fitting I.D. Recommended Length
22
(623 LMP)
1/4" 1' - 8'
28
(793 LMP)
3/8" 1' - 25'
35
(991 LMP)
3/8" 1' - 20'
45
(1274 LMP)
3/8" 1' - 10'
73
(2067 LMP)
1/2" 1' - 20'
RANDOM ORBITAL SANDER SWIRL
-
FREE CHECKLIST
THE COST OF AN AIR HOSE LEAK
PLUG CONNECTORS
Equipment Check:
Random Orbital Sander
❑
90 PSIG (6.2 Bar) is the required operating air supply
pressure. Check the air pressure at the sander while it is
running. Note: Promote the use of Dynabrade maximum flow
plugs and couplers to ensure proper airflow.
❑
Confirm that the tool is running at the rated “Free Speed” RPM.
On an average a 10,000 RPM non-vacuum sander will run at 9,500
RPM; a 12,000 RPM non-vacuum sander will run at 11,500 RPM.
A vacuum sander normally runs slightly slower.
❑
Inspect the balancer bearing (pad bearing). Remove the back-up
pad and rotate the balancer bearing shaft while holding the
counterbalance stationary. The balancer shaft should turn freely.
Back-Up Pad
❑
Inspect the face of the sanding pad. The pad must be flat and smooth,
without any defects. Check if they are using a Dynabrade back-up pad
that is “weight-mated” to the sander. Using another pad can make the
sander vibrate excessively and lead to an unacceptable finish.
Sanding Techniques:
❑
Always START the sander ON the surface, and STOP the sander
OFF the surface.
❑
When sanding keep the sander, and pad FLAT on the surface.
Important: Do not exert heavy downward force on the sander. Apply
enough downward force to keep the back-up pad and abrasive flat on
the surface allowing the back-up pad to orbit freely over the surface.
Compare Airflow SCFM (LPM)
All information based upon size
of I.D. at 90 PSIG (6.2 Bar) in
conjunction with mating coupler.
Sanding Techniques
(
Continued
)
❑
Follow a set pattern when sanding. It is suggested to
pass over the surface following a “North, South, East, West”
pattern (see below), overlapping each pass 1/4 the diameter
of the back-up pad and
abrasive. This insures
that the previous
scratches are
removed and
that a uniform
finish is achieved.
Two “patterns”
per sanding
step are
recommended.
❑
Frequently inspect abrasive for tears, folds, or build-up.
When changing abrasive to proceed to the next sanding
step, first inspect the condition of the abrasive that is on
the sander. If any defects are noticed in that abrasive,
remove it and install another piece of the same grain and
sand the work surface again before proceeding on to the
next sanding step.
❑
Always clear away sanding dust and abrasive debris
before progressing to the next sanding step with a finer
“grit” abrasive.
One 1/16" hole in a hose leaks at 100 PSIG:
➤ 4.25 cubic feet per minute (CFM)
➤ 255 cubic feet per hour
➤ 2,040 cubic feet in an 8-hour day
➤ 6,120 cubic feet per 24 hours
The cost of one leaking air hose:
240
x
6,120
=
1,468,800
working days leakage in cf air lost in cf
per year per 24 hours per year
1,468,800
x
$.00041
*
=
$602.21
*
air lost in cf cost per cf based on typical total cost
per year energy cost per kilowatt-hour per year!
Common Plug
Connector
25 SCFM (708 LPM)
Dynabrade
Plug Connector
76 SCFM (2,152 LPM)
*Costs will vary based on local charges per kilowatt-hour.
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