PROPOINT 8348690 User manual

Please read this manual before use.
User Manual
1/4 IN. COMPOSITE ANGLED
AIR DIE GRINDER
V 3.0 8348690

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8348690 V 3.0
1/4 IN. COMPOSITE ANGLED
AIR DIE GRINDER
SPECIFICATIONS
Air consumption 3 CFM @ 90 PSI
No Load Speed 22,000 RPM
Collet 1/4 in. & 1/8 in. Collet
Air Inlet 1/4 in. NPT Air Inlet
Sound Level 80 dB
INTRODUCTION
This Die Grinder has an extended muffler design to reduce the
sound level and an ergonomic grip. A safety lock lever and heat
treated cast iron cylinder for safety and extended tool life. A
gearless motor reduces the downtime of the tool. The lightweight
thermal-insulated housing reduces cold air transmission and
vibration while working.

4 For technical questions call 1-800-665-8685
V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
IMPORTANT SAFETY PRECAUTIONS
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. Before
allowing someone else to use this tool, make sure they are aware
of all safety information.
WARNING! The warnings, cautions and instructions discussed in
this instruction manual cannot cover all possible conditions and
situations that may occur. Common sense and caution are factors
that cannot be built into this product, but must be supplied by
the operator.
NOTE: Keep this manual for safety warnings, precautions,
operating, inspection and maintenance instructions.
WORK AREA
1. Operate in a safe work environment. Keep your work area
clean and well lit.
2. Do not use in the presence of flammable gases or liquids.
3. Keep anyone not wearing the appropriate safety equipment
away from the work area.
4. Minimize distractions in the work environment. Distractions
can cause you to lose control of the tool.
5. Store tools properly in a safe and dry location to prevent rust
or damage.
6. Always lock up tools and keep them out of the reach of
children.
PERSONAL SAFETY
CAUTION! Wear protective equipment approved by the Canadian
Standards Association (CSA) or American National Standards
Institute (ANSI) when using the tool.
1. Head Protection
a. Always wear impact safety goggles that provide front
and side protection for the eyes.
b. Wear the appropriate rated dust mask or respirator.

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
c. Wear earplugs if the power tool or work environment is
noisy.
d. Wear a full-face shield if your work creates metal filings
or wood chips.
e. Wear a hard hat to protect your head from falling
objects.
2. Gloves
a. The gloves should provide protection based on the work
materials.
b. Wear suitable gloves to reduce the effects of vibration.
3. Protective Clothing
a. Wear protective clothing designed for the work
environment and tool. Examples are electrical non-
conductive clothes or clothes treated to resist corrosive
liquids or materials.
4. Foot Protection
a. Steel toe footwear or steel toe caps to prevent injury
from falling objects.
b. Non-skid footwear is recommended to maintain footing
and balance.
5. Control the tool, personal movement and the work environment
to avoid personal injury or damage to tool. Stay alert, watch what
you are doing and use your common sense.
a. Keep articles of clothing, jewelry, hair, etc., away from
moving parts to avoid entanglement with a tool.
b. Do not operate any machine/tool when tired or under
the influence of drugs, alcohol or medications.
c. Do not overreach when operating a tool. Proper
footing and balance enables better control of a tool in
unexpected situations.
d. Use clamps or other practical ways to support or
secure the workpiece to a stable platform. Holding the
workpiece by hand or against your body is not stable
and may lead to loss of control and injury.

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V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
VIBRATION PRECAUTIONS
1. This tool vibrates during use. Repeated or long-term
exposure to vibration may cause temporary or permanent
physical injury, particularly to the hands, arms and shoulders.
2. Anyone using vibrating tools regularly or for an extended
period should first be examined by a doctor and then have
regular medical check ups to ensure medical problems are
not being caused by or worsened from tool use.
3. If you feel any medical symptoms related to vibrations
(such as tingling, numbness, and white or blue fingers), seek
medical attention as soon as possible.
4. DO NOT use this tool 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
5. Do not smoke while operating the tool. Nicotine reduces the
blood flow to the hands and fingers, increasing the risk of
vibration-related injury.
6. Wear suitable gloves to reduce the effects of vibration.
7. Use the tool with the least amount of vibration, when there is
a choice between different processes.
8. Do not use for extended periods. Take frequent breaks to
when using this tool.
9. Let the tool do the work. Grip the tool as lightly as possible
(while still keeping safe control of it).
10. To reduce vibrations, maintain the tool as explained in this
manual. If abnormal vibrations occur, stop using this tool
immediately.

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
SPECIFIC SAFETY PRECAUTIONS
1. Keep hands and fingers away from grinding area. Any part of
body coming in contact with moving parts could cause injury.
2. To maintain complete control, firmly hold your rotary die
grinder with both hands. Do not place hands over air vents.
Proper cooling of motor is necessary to ensure normal life of
tool.
3. Never point the cutter towards yourself. If it should slip,
part of your body could come in contact with moving parts,
causing injury.
4. Never force the tool. Excessive pressure could bend or break
the mandrel, resulting in damage to the tool, your work piece
or serious personal injury. If your grinder runs smoothly
under no load, but does not run smoothly under load, then
excessive pressure is being used.
5. Use an appropriate dust respirator when working for an
extended period of time. This will help prevent breathing in
the fine dust created while working.
WARNING! Immediately switch off the tool if any of the following
occurs:
• The switch or trigger is broken.
• The tool will not shut off on it own. Disconnect from air
source.
• The user sees or smells smoke.
• The user smells the odour of scorched insulation
AIR TOOL PRECAUTIONS
1. Air tools produce more noise than their electric counterparts.
Extended exposure to this noise may cause hearing loss.
a. Wear ear protection gear to eliminate or reduce the
noise.
b. If possible add a muffling device to the air tool’s
exhaust.
2. Do not operate this tool if the air hose is damaged.
a. Inspect the tool’s air line for cracks, fraying or other
faults before each use.

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V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
b. Discontinue use if a hissing can be heard from the air
line or connectors while operating the tool.
c. Take the following steps if either of the above situations
occur:
i. Tag or mark the tool as “defective” or “out of
service” until repaired.
ii. Contact a qualified person repair or replace the
defective component/hose.
3. Prevent damage to air hose by observing the following:
a. Never use the hose to carry the tool.
b. Keep the air hose of the tool and the tool’s work path
while in operation. The hose should always stay behind
the tool.
c. Keep the hose away from heat, oil, sharp edges or
moving parts.
d. Do not allow people, mobile equipment or vehicles to
pass over unprotected air hose.
i. Position air hose away from traffic areas.
ii. Place hose in reinforced conduit.
iii. Place planks on either side of the hose to create a
protective trench.
e. Do not wrap hose around the tool as sharp edges may
pierce the hose or cause cracks if wound too tight.
Gently coil the hose and either hang on a hook or fasten
with a device to keep hose together when storing.
4. An air hose under pressure that is damaged or disconnected
from an air tool may whip around and cause damage to the
work area or personal injury. Secure the compressor’s air
hose to a fixed or permanent structure with clamps or cable
ties.

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
AIR COMPRESSOR
Ensure the compressor
used with the tool can
supply the required
Cubic Feet per Minute
at the required PSI (see
Specifications).
1. Use proper size and
type of air pressure
line and fittings.
2. Use only clean,
dry, regulated
compressed air at
the rated range as
marked on the tool.
CAUTION! Do not use an
air source other than an
air compressor to power
this tool.
3. Always use an air regulator, an in-line filter and a moisture
trap in your compressed air system. These accessories will
increase the tool’s life and keeps the tool in good working
condition. See the diagram for recommended components of
an air line.
4. Avoid using an air hose that is too long. The longer the hose,
the lower the pressure that reaches the tool, possibly causing
it to cease functioning. As well, a longer hose can become a
tripping hazard.
5. Air tool CFM consumption ratings are based upon a 25% duty
cycle. If you require continuous duty, a larger compressor is
required.

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V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
AIR SOURCE INSTALLATION
WARNING! Never use pure oxygen, carbon dioxide, combustible
gases or any bottled gas as an air source for a tool. Such gases
are capable of causing an explosion and serious injury to persons.
1. Set the air pressure regulator on the air compressor to the
recommended PSI level (see Specifications). Do not exceed
the tool recommended air pressure. Excess pressure could
result in damage to the tool, to your workpiece or serious
injury.
2. Prepare a standard 1/4 in. air connector for use with your
tool. Wrap the threaded portion of the air connector with
thread tape. Wrap in a clockwise direction so it will not
unravel when attaching to a quick connector. Attach it to the
tool air inlet and tighten.
3. Attach a standard quick connector to the air source’s hose.
Attach the air hose to the tool’s air connector.
4. Check the air line and its connections for air leaks. Do not
use the tool until you have repaired all air leaks.
DISCONNECTING AIR SOURCE
WARNING! Failure to follow these steps could result in severe
injury, tool or property damage.
Disconnect tool from air source before cleaning, servicing,
changing parts/accessories or when not in use.
1. Turn hopper regulator to the OFF position.
2. Turn the air regulator to the OFF or L position.
3. Turn off the air compressor.
4. Disconnect the air pressure hose.
5. Discharge any residual pressure inside the tool.

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
AIR TOOL LUBRICATION
CAUTION! NEVER use a penetrating oil to lubricate the tool.
Penetrating oil may act as a solvent that will break down the
grease and cause the tool to seize up.
1. All air tools are packed in grease to prevent corrosion of
internal parts during shipping and storage. We recommend
you clean this out to have optimum performance from your
new air tool. Add a generous amount of air tool oil in the
air inlet, and then run the tool under no load until exhaust is
clear to remove packing grease.
2. It is very important that the tool is lubricated. Without
lubrication, the tool will not work properly and parts will wear
prematurely. Manually adding a drop or two of air tool oil into
the tool’s male connector once a day is better than using an
automatic in-line lubricator. In-line lubricators should only be
required when there are multiple users of the same tool.
3. Air tool oil is the only recommended lubricant for use in all
air tools. Do not use other types of lubricants to oil your
tools. Using the wrong lubricant will cause premature tool
failure and/or loss of power. Substitutes may harm the rubber
compounds in the tool’s O-rings and other seals.
4. Keep the airline lubricator filled and correctly adjusted. The
in-line lubricator should be regularly checked and filled with
air tool oil. Proper adjustment of the in-line lubricator is
performed by placing a sheet of paper next to the exhaust
ports and holding the throttle open approximately 30 seconds.
The lubricator is properly set when a light stain of oil collects
on the paper. Excessive amounts of oil should be avoided.
5. Avoid adding too much air tool oil during normal use. Too
much oil can cause premature power loss and eventual tool
failure. The tool will need to be taken apart by a qualified
technician and cleaned of excess oil.

12 For technical questions call 1-800-665-8685
V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
6. In the event that it becomes necessary to store the tool for
an extended period of time (overnight, weekend, etc.), it
should receive a generous amount of lubrication at that time.
The tool should be run for approximately 30 seconds to
ensure oil has been evenly distributed throughout the tool.
The tool should be stored in a clean and dry environment.
UNPACKING
1. Carefully remove the parts and accessories from the box.
Retain packaging material until you have carefully inspected
and satisfactorily installed or operated the tool.
2. Make sure that all items in the parts list are included.
3. Inspect the parts carefully to make sure the tools and
accessories were not damaged while shipping.
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 serious personal injury.
PARTS IDENTIFICATION
Contents:
• 1/4 in. Composite Angled Air Die Grinder (preassembled)
• 17 mm open-end wrench
• 12 mm open-end wrench

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
ASSEMBLY
NOTE: When this manual refers to a part number, it refers to the
included parts list.
INSTALL AIR CONNECTOR
Prepare a standard 1/4 in. NPT male air connector for use with your
tool.
1. Wrap the external threads of the male connector with sealant
tape.
a. Wrap tape in a clockwise direction so it will not unravel.
b. Do not tape all the threads. Leave several open at the
front to attach the tool.
2. Screw the connector into the tool’s air inlet and tighten with
a wrench until snug.
3. Run compressor at a low volume and check the connection
for air leaks. Do not use the tool until all air leaks are repaired
or the faulty component is replaced.
OPERATION
INSTALLATION OF ACCESSORIES
1. Select the appropriate accessory for the task. Only use a
stone which is specifically designed for use with the die
grinder. Make sure they are capable of handling the tool’s
maximum speed of 22,000 RPM. Make sure the accessory is
tightly installed.
2. Attach the accessory to the grinder.
a. Push the spanner in the collet shaft.
b. Insert mandrel into collet chuck a minimum of 1/4 in.
to prevent wheel or file from disengaging with grinder
while in use.

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V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
NOTE: Inserting mandrel a minimum of 1/4 in. into collet chuck
minimizes vibration, delivers better results, and reduces the risk of
injury.
c. Tighten collet chuck securely with wrench provided.
NOTE: Always check the accessory for tightness before each use.
A loose accessory can be thrown from tool with considerable force,
causing injury.
3. Connect the tool to the air hose.
4. Place the stone over the work piece and turn on the die
grinder.
5. Use grinding wheels when working with hard materials and
rotary files for milling soft materials such as nonferrous
metals (aluminum, brass, copper, etc.) Using grinding
wheels when working with soft materials will clog the wheel,
preventing it from cutting as it was designed.
Important: Never use wheels or files rated below 22,000 RPM.
Wheels or files rated for less than 22,000 RPM could disintegrate
while in use, causing serious injury.
WARNING! Do not allow the tool to run with no load for an
extended period of time as this will shorten it’s life.

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
MAINTENANCE
1. Maintain the tool with care. A tool in good condition is efficient,
easier to control and will prevent unnecessary problems.
2. Keep the tool handles clean, dry and free from oil/grease at
all times.
3. Follow instructions for lubricating and changing accessories.
4. Inspect the tool fittings periodically. Have damaged or
worn components repaired or replaced by an authorized
technician.
5. Inspect the tool fittings, alignment and hoses and power
supply cord and components periodically. Have damaged
or worn components repaired or replaced by an authorized
technician.
6. Maintain the tool’s label and name plate. These carry
important information. If unreadable or missing, contact
Princess Auto Ltd. for replacements.
WARNING! Disconnect the grinder from air supply before
changing accessories, servicing or performing maintenance.
Replace or repair damaged parts.
7. Check for damaged parts. Before using any tool, any part
that appears to be damaged should be carefully checked
to determine that it will operate properly and perform its
intended functions. Check for alignment and binding of
moving parts, for broken parts or mounting fixtures, or for
any other condition that may affect proper operation. Any
part that is damaged should be repaired or replaced by a
qualified technician.
a. Check tool speed regularly with a tachometer. If tool
is operating at a higher speed than the RPM marked
on the tool, the tool should be serviced to correct the
cause before use.
8. When servicing, use only identical replacement parts. Only
use accessories intended for use with this tool. Replace
damaged parts immediately. Non-authorised parts may be
dangerous.

16 For technical questions call 1-800-665-8685
V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
9. Keep the tool clean. Wipe the tool with a clean cloth and
periodically blow out all areas with compressed air. If
compressed air is not available, use a brush to remove dust
from all areas. Do not use harsh chemicals or solvents to
clean the tool. Be sure to switch power OFF and disconnect
the air source during maintenance and inspection.
a. Some silencers on air tools may clog with use. Clean and
replace as required.
10. Regularly inspect all mountings and screws to ensure
tightness. Should any screws become loose, tighten
immediately.
11. If repairs are required, bring your tool to an authorized
service center.
12. All pro.point air motors should be lubricated. (see
Lubrication section)
CAUTION! Only qualified service personnel should repair the tool.
LUBRICATION
Only use the lubricants supplied with the tool or specified by
the manufacturer. Other lubricants may not be suitable and may
damage the tool or cause a malfunction during use.
CAUTION! NEVER use a penetrating oil to lubricate the tool.
Penetrating oil may act as a solvent that will break down the
grease and cause the tool to seize up.
STORAGE
When not in use for an extended period, apply a thin coat of
lubricant to the steel parts to avoid rust. Remove the lubricant
before using the tool again.
DISPOSING OF TOOL
If your tool has become damaged beyond repair, do not throw it
out. Bring it to the appropriate recycling facility.

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
PARTS BREAKDOWN
Part # Description Qty
1 Plug Screw 1
2 O-Ring 1
3 O-Ring 1
4 Air Regulator 1
5 Valve Spring 1
6 O-Ring 1

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V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
Part # Description Qty
7 Valve Stem 1
8 O-Ring 1
9 Motor Housing 1
10 Valve Bushing 1
11 Muffler 1
12 Air Inlet 1
14 Lever 1
15 Lever Pin 1
16 Pad 1
17 Pin 1
18 Bearing Plate 1
19 O-Ring 1
20 Connect Nut 1
21 Angle Head 1
22 Bearing 1
23 Bearing Plate 1
24 Locating Pin 1
25 Cylinder 1
26 Rotor 1
27 Rotor Blade 5
28 Rotor Collar 1
29 Bearing Plate 1
30 Bearing 1
31 Spindle 1
32 Collet 1
33 Collet Nut 1
34 Housing Cap 1
35 12 mm Wrench 1
36 17 mm Wrench 1

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8348690 1/4 in. Composite Angled Air Die Grinder V 3.0
TROUBLE SHOOTING
If the tool does not function properly or if it is missing parts,
contact Princess Auto Ltd. for a solution. If unable to do so, have a
qualified technician service the tool.
Problem(s) Possible cause(s) Suggested solution(s)
Tool runs at
normal speed
but loses
power under
load.
Motor parts worn. Have a qualified technician
replace worn parts.
Lack of air tool oil. Pour air tool oil into air inlet
per instructions.
Tool runs
slowly. Air
flows slightly
from exhaust.
Motor parts
jammed with dirt
particles.
OR
Air flow blocked
by dirt.
• Check air inlet filter for
blockage.
• Pour air tool oil into air
inlet as per instructions.
• Operate tool in short
bursts.
• Disconnect air supply.
Free motor by rotating
drive shank manually
where applicable.
• Repeat above as
needed. If this fails,
bring to Princess Auto
Ltd. or to a qualified
technician.
Excessive air tool
oil in tool. Run tool under no load for short periods of time until
exhaust clears.
Build up of
shipping grease. See Removing Packing Grease section.
Air Flow Regulator
is in the closed
position
Open regulator to correct
position

20 For technical questions call 1-800-665-8685
V 3.0 1/4 in. Composite Angled Air Die Grinder 8348690
Problem(s) Possible cause(s) Suggested solution(s)
Tool will not
run. Air flows
freely from
exhaust.
O-rings throttle
valve dislodged
from seat inlet
valve.
Have a qualified technician
replace the O-ring.
Damage or
excessive wearing
of internal parts.
Bring to Princess Auto Ltd.
or a qualified technician.
Material buildup
impeding motor
vanes.
Clean internal mechanism.
Tool will not
shut off. O-rings throttle valve dislodged
from seat inlet
valve.
Bring to Princess Auto Ltd.
or a qualified technician.
Loss of power
or erratic
performance.
Excessive drain
on the air line.
Moisture or
restriction in the
air hose. Incorrect
size or type of
hose connectors.
Check the air supply. Ensure
tool is connected to a 3/8 in.
I.D. or larger air hose with no
kinks or restrictions and that
the fittings are connected
properly.
Air compressor
has insufficient
flow.
Ensure tool is connected to
a compressor with a rated
flow that matches the tool.