Power Fist 9073925 User manual

V1.0 9073925
Please read and understand all instructions before use. Retain this manual for
future reference.

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SPECIFICATIONS
Voltage Rating 120V AC
Amperage Rating 10A
Frequency Rating 60Hz
No Load Speed 900 to 3,700 RPM
Arbor Size 3/4 in.
Drum Size 4 in.
Handle Type D-handle
Cord Size (AWG) 16
Cord Length 6 ft
Cord Type PVC
Weight 18 lb
INTRODUCTION
The drum sander is ideal for sanding wood and metal surfaces for painting
or nishing. The abrasive drums and sanding drums are easily removed and
secured to the spindle with a screw.
SAFETY
WARNING! Read and understand all instructions before using this tool.
The operator must follow basic precautions to reduce the risk of
personal injury and/or damage to the equipment.
HAZARD DEFINITIONS
Please familiarize yourself with the hazard notices found in this manual. A
notice is an alert that there is a possibility of property damage, injury or death
if certain instructions are not followed.
DANGER! This notice indicates an immediate and specic hazard that will result in severe
personal injury or death if the proper precautions are not taken.
WARNING! This notice indicates a specic hazard or unsafe practice that could result in a
serious injury if the proper precautions are not taken.
CAUTION! This notice indicates a potentially hazardous situation that may result in minor
or moderate injury if proper practices are not taken.
NOTICE! This notice indicates that a specic hazard or unsafe practice will result in
equipment or property damage, but not personal injury.
V1.0 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER 9073925
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WORK AREA
1. Operate in a safe work environment. Keep your work area clean, well-lit
and free of distractions. Place lights so you are not working in a shadow.
2. Keep anyone not wearing the appropriate safety equipment away from
the work area.
3. Store unused tools properly in a dry, safe and secure location to prevent
rust, damage or misuse.
4. Do not install or use in the presence of ammable gases, dust or liquids.
PERSONAL SAFETY
WARNING! Wear personal protective equipment approved by the
Canadian Standards Association (CSA) or American National Standards
Institute (ANSI).
PERSONAL PROTECTIVE EQUIPMENT
1. Always wear impact safety goggles that provide front and side protection
for the eyes. Eye protection equipment should comply with CSA Z94.3-07
or ANSI Z87.1 standards based on the type of work performed.
2. Wear protective clothing designed for the work environment and tool.
3. Non-skid footwear is recommended to maintain footing and balance in the
work environment
4. Wear the appropriate rated dust mask or respirator. Wear a NIOSH
approved respirator when working on materials that produce hazardous
fumes, dust or particulate matter.
a. The dust generated while sanding certain wood species and wood
products can be injurious to your health. Always operate your sander
in a well ventilated area and provide for proper dust removal. Dust
collection systems should be used whenever possible. Splinters,
airborne debris and dust can cause irritation, injury, and/or illness.
PERSONAL PRECAUTIONS
Control the tool, personal movement and the work environment to avoid
personal injury or damage to tool.
1. Do not operate any tool when tired or under the inuence of drugs,
alcohol or medications.
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2. Avoid wearing clothes or jewelry that can become entangled with the
moving parts of a tool. Keep long hair covered or bound.
3. Do not overreach when operating a tool. Proper footing and balance
enables better control in unexpected situations.
4. Securely hold this tool using both hands. Using a tool with only one hand
can result in loss of control.
5. Support the workpiece or clamp it to a stable platform. Holding the
workpiece by hand or against your body may lead to personal injury.
SPECIFIC SAFETY
WARNING! DO NOT let comfort or familiarity with product (gained from
repeated use) replace strict adherence to the tool safety rules. If you use
this tool unsafely or incorrectly, you can suer serious personal injury.
WARNING! Some surfaces contain materials which can be toxic. When
working on materials that may contain lead, asbestos, copper chromium
arsenate or other toxic materials, extra care should be taken to avoid
inhalation and minimize skin contact.
1. Use the correct tool for the job. This tool was designed for a specic
function. Do not modify or alter this tool or use it for an unintended
purpose.
2. The sanding drum is active when power is applied. Keep hands and ngers
away from the sanding area. Any body part coming into contact with the
tool's moving parts could cause an injury.
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POWER TOOL PRECAUTIONS
1. Do not use any power tool with a malfunctioning power switch or control.
A power tool that fails to respond to the controls is dangerous and can
cause an injury. A qualied technician must repair and verify the power
tool is operating correctly, before it can be used.
2. Shut the power o and disconnect the drum sander from the power
supply (if possible) before making any adjustments, changing accessories,
cleaning, servicing or when storing. Such preventive safety measures
reduce the risk of starting the tool accidentally.
3. Never force the tool. Excessive pressure could bend or break the drum
sander, resulting in damage to the tool, your workpiece or serious
personal injury. If the drum sander runs smoothly under no load, but
does not run smoothly under load, then excessive pressure is being used.
4. Check if the drum sander's moving parts are misaligned or binding before
each use. Correct the issue before using the drum sander to avoid an
injury or damage to the tool.
5. Always be aware of the position of your hands relative to the drum
sander. Avoid awkward hand positions where a sudden slip could cause a
hand to move into the sanding drum. Never reach behind or beneath the
drum sander.
6. Only use accessories that are specically designed for use with the drum
sander. Ensure the sanding drum is tightly installed.
7. Only use a sanding drum that exceeds the Speed rating (see
Specications).
8. Before using the drum sander on a workpiece, test the drum sander by
running it at the highest speed rating for at least 30 seconds in a safe
position. Stop immediately if there is any abnormal vibration or wobbling.
Check the tool to determine the cause.
9. Never touch the sanding drum or workpiece during or immediately after
use. They may be hot and could inict a burn injury.
10. The material and the motor housing can get very hot during operation.
Stop work until the tool cools down to a safe temperature.
11. Do not cover the air vents. Proper cooling of the motor is necessary to
ensure normal life of the tool.
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12. Never use a tool with a sanding drum that is cracked or worn. Change the
sanding drum before using it.
13. Do not place the drum sander down until the sanding drum has stopped
moving. The drum sander may catch the surface of work material and
wrench itself free, causing injury to the user or others in the work area.
14. Never point the drum sander towards yourself. It could inict an injury.
ELECTRICAL SAFETY
WARNING! Do not touch or handle a live tool with any part of your body
that is wet or damp. Wet skin reduces resistance to electrical current,
increasing the danger of a serious or fatal shock.
1. Do not alter any parts of the tool or accessories. All parts and accessories
are designed with built-in safety features that may be compromised if
altered.
2. Protect yourself against electric shocks when working on electrical
equipment. Avoid body contact with grounded surfaces. There is an
increased chance of electrical shock if your body is grounded.
3. Do not expose the drum sander to rain, snow, frost or any other damp
or wet conditions. Water entering a tool will increase the risk of electric
shock.
4. In the event of a power failure, turn o or unplug the machine as soon as
the power is interrupted. The possibility of accidental injury could occur if
the power returns and the unit is not switched o.
5. Make certain the power source conforms to requirements of your
equipment (see Specications).
6. A polarized plug has two blades of dierent widths, allowing only one
way to insert the plug into the outlet. If the outlet does not accept a
polarized plug, contact a qualied electrician to install a polarized outlet.
Do not alter the plug, as this may compromise the built-in safety feature.
V1.0 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER 9073925
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POWER CORD SAFETY
1. Insert the power cord plug directly to the power supply whenever
possible. Use extension cords or surge protectors only when the tool's
power cord cannot reach a power supply from the work area.
a. When operating a tool outside, use an outdoor extension cord
marked W-A or W. These cords are rated for outdoor use and reduce
the risk of electric shock.
2. Do not operate this tool if the power cord is frayed, damaged or poorly
spliced, as an electric shock may occur, resulting in personal injury or
property damage.
3. Discontinue use if a power cord feels more than comfortably warm while
operating the tool.
4. Keep all connections dry and o the ground to reduce the risk of electric
shock. Do not touch the plug or wiring with wet hands.
5. Prevent damage to the power cord by observing the following:
a. Place the power cord in a position that prevents it from coming into
contact with the tool or getting caught by the workpiece. The cord
should always stay behind the tool.
b. Do not pull on the cord to disconnect the plug from an outlet.
c. Keep the cord away from heat, oil, sharp edges or moving parts.
6. Position the cord so it is not be stepped on, tripped over or otherwise
subjected to damage or stress.
7. Do not wrap the cord around the tool, as sharp edges may cut insulation
or cause cracks if wound too tight. Gently coil cord and either hang on a
hook or fasten with a device to keep cord together during storage.
KICKBACK PRECAUTIONS
Kickback is a sudden reaction whensnags or is caught on the material. If
kickback occurs:
•The sanding drum may pass over a body part, causing a seriously injury
•The tool may strike bystanders.
•Kickback can also damage the tool or workpiece.
Kickback can be avoided by taking proper precautions:
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1. Maintain a rm grip on the tool and position your body and arms to allow
you to resist a kickback. Kickback will propel the tool in the direction
opposite the sanding drum's direction of rotation. The tool may pull out of
your grasp.
a. Use clamps or a vice to hold down smaller workpieces.
2. Only use a sanding drum designed for the tool.
3. Large panels may sag under their own weight. Place supports under the
panel on both sides of the work area.
VIBRATION PRECAUTIONS
1. This tool vibrates during use. Repeated or long-term exposure to vibration
may cause temporary or permanent physical injury. Take frequent breaks
when using the tool.
2. If you feel any medical symptoms related to vibrations (such as tingling,
numbness, and white or blue ngers), seek medical attention as soon as
possible.
3. Wear suitable gloves to reduce the eects of vibration.
4. DO NOT use this tool before consulting a physician if one of the following
applies:
a. Pregnant
b. Impaired blood circulation to the
hands
c. Past hand injuries
d. Nervous system disorders
e. Diabetes
f. Raynaud's Disease
UNPACKING
WARNING! Do not operate the tool if any part is missing. Replace
the missing part before operating. Failure to do so could result in a
malfunction and personal injury.
Remove the parts and accessories from the packaging and inspect for damage.
Contents: • Drum Sander
• Sanding Drum
V1.0 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER 9073925
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• Hex Wrench • Wrench
IDENTIFICATION KEY
A. Safety Guard
B. D-handle
C. Housing
D. Speed Dial
E. Soft Grip
F. Sanding Drum
G. Transfer case
H. Carbon Brush Cap
I. Trigger
J. Power cord FIGURE 1.
ASSEMBLY & INSTALLATION
D-HANDLE ASSEMBLY
1. Position the D-handle so the bolt holes align with the mounting holes
on the tool's body on either side (see Identication Key). Make sure the
handle curves toward the safety guard.
2. Insert the short screw into the handle on the gear box side and tighten
until hand-tight.
3. Insert the longer screw into the longer handle arm and tighten until
hand-tight.
INSTALL THE DRUM
WARNING! Unplug the drum sander from the power supply before
making any adjustments involving the sanding drum to avoid a serious
injury or amputation.
1. Insert the hex wrench into the fastening screw on the side of the drum.
2. Insert the wrench onto the shaft's ats near the gearbox to hold the shaft
in place.
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3. The screw's thread is left-hand. Turn the screw clockwise to loosen.
4. Remove the screw and washer and set aside.
5. Pull the drum from the shaft and set aside or place in storage.
6. Align the groves in the new drum with the spline keys on the shaft.
7. Push the drum onto the shaft.
8. Reinstall the washer and screw. Hold the ats with the wrench and turn
the screw counterclockwise to tighten. Stop when hand-tight.
DUST PORT
The dust port directs the accumulated dust from the tool. Connect a dust
collection system to the port. Continue to wear a dust mask, as suspended dust
may still be in the air.
OPERATIONS
Set the tool's speed by rotating the variable speed dial to the appropriate
number. Speed increases as higher numbers are selected. The speed can be
changed without turning o the tool, as long as the tool is no longer touching
the workpiece.
SANDING
1. Check that the work surface is free from debris before sanding.
2. Set the tool's speed by rotating the variable speed dial to the appropriate
number. Speed increases as higher numbers are selected. The speed can
be changed without turning o the tool, as long as the tool is no longer
touching the workpiece.
3. Firmly grasp both the front and rear handles.
4. Start the drum sander and allow it to attain full speed.
5. Hold the drum sander rmly and apply it to the workpiece.
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6. Move the drum sander across the workpiece lightly, letting the tool to do
the work.
a. Move the tool only forward and backwards for the best result. Lift it
when you need to move laterally to a new section on the workpiece.
b. Overlap the previous work path with the sanding drum on each
subsequent pass to make sure no areas are missed on the workpiece.
7. Avoid rocking or tilting the drum sander. This can cause deep cuts and
gouges in the work surface.
8. Keep the drum sander in motion. Pausing in one spot will allow the drum
sander to eat into the work, creating an uneven surface.
9. Lift the drum sander while still under power. Once clear of the workpiece,
switch the power o and and allow the sanding drum to slow to a stop
before placing the tool down.
CARE & MAINTENANCE
1. Maintain the tool with care. A tool in good condition is ecient, easier to
control and will have fewer problems.
2. Inspect the tool components periodically. Repair or replace damaged or
worn components.. Only use identical replacement parts when servicing.
3. Only use accessories intended for use with this tool. Follow instructions
for changing accessories.
4. Keep the tool handles or gripping surfaces clean and dry.
5. Maintain the tool’s labels and name plates. These carry important
information. If unreadable or missing, contact Princess Auto Ltd. for
replacements.
6. Check the carbon brushes periodically. Replace brushes when they have
about 1/4 in. remaining or the brush displays signs of breakage, crumbling
or burning. Check that the new brushes can move freely in the brush
holder. Run the motor for 15 minutes without load to shape the brushes,
so that they are properly aligned with the commutator.
WARNING! Only qualied service personnel should repair the tool. An
improperly repaired tool may present a hazard to the user and/or others.
9073925 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER V1.0
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CARBON BRUSH MAINTENANCE
The carbon brushes may require maintenance when the motor performance of
the tool decreases or stops working completely.
1. Remove the brush cap from the brush holder on each side of the motor
housing.
2. Remove the carbon brushes from the housing. Keep track of how the
carbon brushes are orientated during removal. The concave surface must
be oriented in the same way if the brushes are reused. This will prevent
unnecessary wear after reinstalling them.
3. Clean old carbon brushes before reinstalling them. Rub the contact areas
with a pencil eraser.
4. Reinsert the old carbon brushes in the same orientation to reduce wear.
5. Replace both carbon brushes if either is worn down more than 50 percent.
6. When installing the carbon brushes make sure the carbon portions of the
carbon brushes contact the motor armature and that the springs face
away from the motor. Also, make sure the springs operate freely.
7. Replace the brush caps. Do not overtighten.
IMPORTANT! New carbon brushes tend to spark when rst used until
they wear and conform to the motor's armature.
CLEANING
• Wipe down exterior surfaces with a damp cloth to remove accumulated
dust.
DISPOSAL
Recycle a tool damaged beyond repair at the appropriate facility.
Contact your local municipality for a list of disposal facilities or by-laws for
electronic devices, batteries, oil or other toxic liquids.
V1.0 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER 9073925
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TROUBLESHOOTING
Visit a Princess Auto Ltd. location for a solution if the tool does not function
properly or parts are missing. If unable to do so, have a qualied technician
service the tool.
Problem(s) Possible Cause(s) Suggested Solution(s)
The drum
sander will not
start.
1. Supplied power is interrupted.
2. Carbon brush commutator is
dirty.
3. Fuse or breaker tripped.
4. Motor components are
defective.
5. Motor has overheated.
6. Extension cord or power
supply cord is damaged.
1. Check that power supply is still
available.
2. See Carbon Brush Maintenance.
3. Replace fuse or reset breaker.
4. Have a qualied technician
service the tool.
5. Allow motor to cool before
attempting to use.
6. Replace damaged power cord.
Motor starts
slow and
doesn't reach
operation speed.
1. Voltage is too low.
2. Motor is damaged.
3. Extension cord is too long or
wire gauge is too thin.
1. Conrm power source amps
and voltage matches or
exceeds those of the drum
sander. Remove other tools or
devices on the same electrical
circuit.
2. Have a qualied technician
service the tool.
3. Eliminate the use of an
extension cord. If an extension
cord is needed, use one with
the proper diameter for its
length and load.
Tool is making
unusual sounds. 1. The drum sander's parts may
be rubbing or binding.
2. Carbon brush commutator is
dirty.
3. Worn tool components
1. Check for obstructions or
misaligned tool components.
Lubricate, repair or replace
the components based on the
particular problem.
2. Clean the commutator and
carbon brushes (see Carbon
Brush Maintenance).
3. Check and replace worn parts.
9073925 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER V1.0
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Problem(s) Possible Cause(s) Suggested Solution(s)
Performance
decreases over
time.
1. The sanding drum is dull or
damaged
2. Carbon brushes worn or
damaged.
1. Keep the sanding drum sharp.
Replace as needed
2. Clean the commutator and
carbon brushes (see Carbon
Brush Maintenance).
Overheating 1. Forcing machine to work too
fast.
2. The sanding drum is dull or
damaged
3. Blocked motor housing vents.
4. Extension cord is too long or
wire gauge is too thin.
1. Allow machine to work at its
own rate.
2. Keep the sanding drum sharp.
Replace as needed
3. Blow dust out of motor using
compressed air.
4. Eliminate the use of an
extension cord. If an extension
cord is needed, use one with
the proper diameter for its
length and load.
Machine slows
when operating. 1. Low voltage due to
insuciently powered circuit.
2. Feed rate into the sanding
drum too great.
1. Attach to power circuit with
adequate amperage.
2. Slow rate of feed into the
sanding drum.
Sanding grit
does not remain
on the sanding
drum.
1. Exposed to dry conditions that
have caused the adhesive to
become brittle.
2. The sanding drum is damaged
or creased.
1. Store the sanding drum in
a location that does not
have extreme temperature or
dryness.
2. Store the sanding drum at.
Deep grooves
appear in the
workpiece.
1. Sanding grit is too coarse.
2. Sanding across the wood grain.
3. Excessive pressure against the
sanding drum.
4. The drum sander is held too
long in one place.
1. Change to a ner grit.
2. Sand with the wood grain.
3. Reduce pressure on workpiece
while sanding.
4. Move the drum sander more
often while sanding.
The sanding
drum is clogged.
1. Sanding a soft wood.
2. Excessive pressure against the
sanding drum.
1. Clean the sanding drum with a
dressing stick frequently.
2. Reduce pressure on workpiece
while sanding.
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Burns appear on
workpiece.
1. Excessive pressure against the
sanding drum.
2. The drum sander is held too
long in one place.
3. Sanding grit is too ne.
1. Reduce pressure on workpiece
while sanding.
2. Move the drum sander more
often along the workpiece.
3. Change to a coarser grit.
Machine slows
when operating.
1. Low voltage due to
insuciently powered circuit.
2. Wrong gauge extension cord.
1. Attach to power circuit with
adequate amperage.
2. Replace with a thicker gauge
extension cord.
9073925 VARIABLE-SPEED ELECTRIC DRUM SANDER/POLISHER V1.0
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PARTS BREAKDOWN
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PARTS LIST
# DESCRIPTION QTY
1 Gear box cover 1
2 Screw ST4×16-F 9
3 Screw ST5×25-F 4
4 Gear box 1
5 Screw cap M8*13*6.5 1
6 Small Gear 1
7 Bearing, 6001 1
8 Screw M4×8 4
9 Rotor 1
10 Magnetic Ring 1
11 Bearing 608 1
12 Bearing sleeve 608 1
13 Dust guide ring 1
14 Screw ST4×65 2
15 Stator 1
16 Housing 1
17 Carbon brush 1
18 Tension spring 2
19 Carbon brush holder 2
20 Carbon Brush Cap 2
21 Handle housing, right 1
22 Constant speed PCB 1
23 Switch 1
24 Cable plate 1
25 Power cord sleeve 1
26 Power cord 1
27 Handle housing, left 1
28 Shaft 1
29 Flat Key 1
# DESCRIPTION QTY
30 Transfer case 1
31 Bearing 6002z2 zz 2
32 Circlip Ø32 2
33 Circlip Ø15 1
34 Drive Belt 1
35 Gear 1
36 Transfer case cover 1
37 Circlip Ø12 1
38 Retaining ring 1
39 Drive Gear 1
40 Screw M4 x 16 6
41 Round pin 2
42 Circlip for shaft Ø15 1
43 Woodru Key 2
44 Intermediate shaft 1
45 Big gear 1
46 Wave washer 1
47 Circlip for shaft Ø10 1
48 Needle Bearing HK0810 1
49 Safety Guard 1
50 Screw M4 x 12 2
51 Drum 1
52 Flat key 6 X 86.5 2
53 Flat washer 1
54 Screw M8 × 25 3
55 Dust collector 1
56 D-handle 1
57 Hex Wrench 1
58 Wrench 1
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V1,0 9073925
Vous devez lire et comprendre toutes les instructions avant d'utiliser l'appareil.
Conservez ce manuel afin de pouvoir le consulter plus tard.

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