Rockwood 31825 User manual

AIR DIE GRINDER
INSTRUCTIONS
Item #31825

2Eastwood Technical Assistance: 800.343.9353 >> [e-mail]
The ROCKWOOD AIR DIE GRINDER is a heavy-duty professional quality tool ruggedly designed for
many years of reliable service. It features positive 1/8” & 1/4”, non-slip collets for quick, convenient
and secure accessory changes. A high-torque, 4 vane, ball bearing motor provides smooth operation
and long life. Speed is easily controlled with an infinitely progressive trigger control.
CONTENTS
(1) Inline Die Grinder
(1) 1/8” Collet
(1) 1/4” Collet (installed)
(2) 14mm/19mm
Combination Collet Wrenches
(1) 1/4” MNPT, Male Quick
Disconnect Inlet Fitting
SPECIFICATIONS
Collet Sizes: 1/8” & 1/4” [3mm & 6mm]
RPM: 22,000 free speed
Air Consumption: 4 cfm [114 L/m] @ 90 PSI
Inlet thread size: 1/4” FNPT
Variable speed, 4 vane, ball bearing air motor
DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.
WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.
CAUTION used with the safety alert symbol, indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
NOTICE is used to address practices not related to personal injury.
SAFETY INFORMATION
The following explanations are displayed in this manual, on the labeling, and on all other information
provided with this product:
1/8”
Collet
✓
1/4” Collet (installed)
✓

To order parts and supplies: 800.343.9353 >> eastwood.com 3
READ INSTRUCTIONS
• Thoroughly read and understand these product instructions before using this tool.
Failure to follow all warnings can result in tool damage or serious physical injury.
• Keep these product instructions for future reference.
EYE INJURY HAZARD!
• Rapidly rotating surfaces can eject metal particles, dirt and debris at high
velocity. Always wear ANSI approved eye protection when operating this tool.
HEARING DAMAGE HAZARD!
• This Rockwood Pneumatic Tool emits high sound levels while operating. Use ANSI
approved ear protection when operating.
BURSTING HAZARD!
• Do not exceed 90 psi (6.3 bar) of tool inlet pressure. Permanent tool damage and/
or explosion could occur and cause personal injury.
INJURY HAZARD!
• This tool uses high-speed, highly abrasive cutting surfaces which can quickly
cause injury. Keep fingers and hands away from moving parts when operating.
Wear thick, well-fitting work gloves and keep loose clothing, sleeves, cords,
jewelry and hair away from moving parts.
• This tool will eject sparks at high speed which can ignite flammable materials
or injure others nearby. Do not operate near flammable materials and keep all
persons and pets away from the work area.
• Do not force tool or exert excessive side forces on tool while in use as accessories
can bend or disintegrate causing them to fragment and eject sharp pieces at
high velocity.
• Always make sure the workpiece is securely clamped or anchored to avoid sudden
movements which could result in injury.
• Frequently inspect accessories (not included) and tool condition. If damage devel-
ops, discontinue tool use immediately and replace damaged accessory. ONLY USE
replacement 1/8” or 1/4” shank accessories rated for 22,000 RPM or greater use,
otherwise severe injury or death can result in the event of accessory failure.
• Always disconnect tool from air supply when changing accessories to prevent
accidental tool starting and potential severe injury.
VIBRATION INJURY HAZARD!
• This tool will vibrate during use! Repeated exposure to vibration may cause
physical injury.

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SET-UP
• Using a good quality Teflon sealing tape (not included), thread the 1/4” MNPT, Male quick
disconnect inlet fitting into the air inlet.
INJURY HAZARD!
To avoid injury, always disconnect air supply to Die Grinder before installing
or replacing accessories.
INJURY HAZARD!
To avoid injury, only use accessories rated for High-RPM,
(22,000 or greater) use.
TO INSTALL OR SWITCH ACCESSORIES (not included)
• With air supply disconnected,
Slide the smaller 14mm end of a
Collet Wrench over the flats of the
shaft and the larger 19mm end of
a Collet Wrench over the flats of
the Collet Retainer (FIG 1).
Loosen the threaded-on Collet
Retainer to release the Collet grip
on accessory then and pull out
the accessory. Replace accessory
with one of the same size shank
by sliding the shank into the
Collet then retighten securely.
TO SWITCH TO A COLLET OF ANOTHER SIZE
• With air supply disconnected,
Slide the smaller 14mm end of a
Collet Wrench over the flats of the
shaft and the larger 19mm end of
a Collet Wrench over the flats of
the Collet Retainer. Loosen then
remove the threaded-on Collet
Retainer and place it aside for
re-installation (FIG 2).
• Withdraw the accessory
(if installed) and the Collet.
• Install Collet into bore of Shaft.
• Place accessory (not included) into Collet.
• Replace Collet Retainer and tighten securely with included Wrenches.
1/8” Collet
✓
FIG. 1
FIG. 2
1/4” Collet
✓
Collet
Retainer

To order parts and supplies: 800.343.9353 >> eastwood.com 5
CONNECTION
• Be sure that the air supply to the tool is clean and dry. Moisture in the supply line will quickly
damage the motor and valves.
• A minimum 3/8” I.D. air line should be used for optimal performance.
OPERATION
• Connect air supply, hold tool securely and depress Paddle to begin rotating action.
Speed is regulated by pressure applied to the Paddle.
MAINTENANCE
• Add several drops of air tool oil before each use by dropping directly into the air inlet.
• If tool is to be unused for an extended period, add 10 drops of air tool oil directly to the air inlet,
rotate the tool motor by hand several times to distribute the oil throughout the motor
and gearbox then store the tool, handle up.
INJURY HAZARD!
To avoid injury, always disconnect air supply to Die Grinder before installing
or replacing accessories.
INJURY HAZARD!
To avoid injury, only use accessories rated for High-RPM,
(22,000 or greater) use.

6Eastwood Technical Assistance: 800.343.9353 >> [e-mail]
NOTES

To order parts and supplies: 800.343.9353 >> eastwood.com 7
Tool doesn’t
respond to
Paddle
depression
Insufficient vol-
ume of air (CFM)
to operate tool
Verify sufficient air supply to tool.
(4 CFM @ 90 PSI minimum requirement).
Moisture or oth-
er contamination
in air supply
Check for moisture in air line and tool air inlet.
Tool perfor-
mance is slow
or sluggish
Insufficient
volume of
air (CFM) to
operate tool
Verify sufficient air supply to tool.
(4 CFM @ 90 PSI minimum requirement).
Moisture or oth-
er contamination
in air supply
Check for moisture in air line and tool air inlet.
Air Motor
is lacking
lubrication
Stop use immediately and add air tool oil directly
to air inlet.
Tool is exces-
sively noisy/
emits high
pitched sound
Air Motor
is lacking
lubrication
Stop use immediately and add air tool oil directly
to air inlet.
Tool vibrates
excessively
during use
Out of balance
condition from
damaged
accessory
Stop use immediately, check for damage and
replace accessory.
Loose Collet
Retainer Tighten loose Collet Retainer securely.
TROUBLESHOOTING

© Copyright 2017 Easthill Group, Inc. 6/17 Instruction item #31825Q Rev 1
If you have any questions about the use of this product, please contact
The Eastwood Technical Assistance Service Department: 800.343.9353 >> email: [e-mail]
PDF version of this manual is available online >> eastwood.com/31825manual
The Eastwood Company 263 Shoemaker Road, Pottstown, PA 19464, USA
US and Canada: 800.343.9353 Outside US: 610.718.8335
Fax: [phone] eastwood.com
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