Rockwood 31741 User manual

3" CUT OFF TOOL
INSTRUCTIONS
Item #31741

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The ROCKWOOD 3” CUT-OFF TOOL is a heavy-duty professional quality tool ruggedly designed for
many years of reliable service. It features a heavy-gauge wheel guard for maximum safety and a
ball bearing motor for smooth operation and long life. Speed is easily controlled with an infinitely
progressive throttled trigger control.
CONTENTS
(1) 3” Cut-Off Tool
(1) Flat Wrench
(1) Hex Key Wrench, 5mm
(1) 3” x 3/8” x 1/16”,
26,000 RPM
Cut-Off Wheel
(1) 1/4” MNPT,
Male quick-disconnect
Inlet Fitting
SPECIFICATIONS
Arbor Size: 3/8” [9.5mm]
Replacement Cut-Off Wheel Size: 3/8” [9.5mm] x 3” with a min. 20,000 RPM rating
Maximum Cutting Depth: 11/ 16” [17. 5mm ]
RPM: 20,000 free speed
Air Consumption: 6 cfm [169 L/m] @ 90 PSI [6.2 Bar]
Inlet Thread Size: 1/4” FNPT
Variable Speed, 4 Vane, Ball Bearing Air Motor

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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.
• Dust and fine particles are generated while cutting which can contain
hazardous or toxic substances. Breathing this dust can cause many
serious respiratory health conditions. Always use NIOSH approved
respiratory protection while using this tool.
EYE INJURY HAZARD!
• Rapidly rotating surfaces can eject metal particles, dirt and oils at high ve-
locity. Always wear ANSI approved eye protection when operating this tool.
HEARING DAMAGE HAZARD!
• The Rockwood Pneumatic Cut-Off Tool emits high sound levels while
operating. Use ANSI approved ear protection when operating this tool.
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:

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BURSTING HAZARD!
• Do not exceed 90 psi (6.3 bar) of tool inlet pressure. Permanent tool
damage and/or bursting could occur and cause personal injury.
INJURY HAZARD!
• This tool has high-speed, highly abrasive cutting surfaces which can quickly
cause severe 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 a trail of sparks at high speed which can ignite flammable
materials or injure others nearby. Do not operate in the vicinity of flammable
materials and keep all persons and pets away from the work area.
• Do not force tool or exert side forces on Cut-Off Wheel while cutting as
the tool body can suddenly kick back or twist causing severe hand or wrist
injury. Cut-Off Wheels can shatter with excessive side force causing them
to disintegrate and eject sharp pieces at high velocity.
• Always make sure the workpiece being cut is securely clamped or anchored
to avoid sudden movements which could result in injury.
• Frequently inspect Cut-Off Wheel and tool condition. If cracks or chips
develop, discontinue tool use immediately and replace damaged Wheel.
ONLY USE replacement Wheels rated at 20,000 RPM or greater. Severe
injury can result in the event of Cut-Off Wheel failure.
VIBRATION INJURY HAZARD!
• This tool will vibrate during use! Repeated exposure to vibration may cause
physical injury. Always disconnect tool from air supply when changing Cut-
Off Wheels to prevent accidental tool starting and potential severe injury.

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SET-UP & CONNECTION
• Wrap white thread sealing tape (not included) around the threads of the 1/4” Male NPT quick
disconnect fitting, then thread it into the 1/4” NPT inlet threads of the Cut-off tool.
• Attach Air Supply to Inlet Fitting.
SET-UP
• The Cut-Off Wheels are removed
and installed by gripping the
flats on the output shaft with the
included Flat Wrench while placing
the Included Hex Key Wrench into
the Socket Head Wheel Retaining
Screw threaded into the shaft. Turn
the screw in a counter-clockwise
direction when viewed from the
end. Remove Retaining Washer
(note outward orientation of beveled
edge) then remove cutting wheel
(FIG 1).
• Place replacement wheel over the stepped 3/8” [9.5mm] diameter portion of the shaft, replace
Retaining Washer in the proper bevel-out position then use the wrenches to tighten (FIG 1).
Be sure that the air supply to the tool is clean and dry.
Moisture in the supply line will quickly damage the air motor and valves.
A minimum 3/8” I.D. air line should be used for optimal performance.
INJURY HAZARD!
Disconnect air supply from the tool to prevent accidental starting and
potential injury while installing or removing Cut-off Wheels.
Be sure the Socket Head Wheel Retaining Screw is securely tightened on the
output shaft before operating tool.
FIG. 1

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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 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.
• With the air supply disconnected, periodically check that the Socket Head Wheel Retaining
Screw is tight.
INJURY HAZARD!
Disconnect air supply from the tool to prevent accidental starting and
potential injury while installing or removing Cut-off Wheels.
INJURY HAZARD!
To avoid injury, only use replacement Wheels rated for High-RPM,
(20,000 or greater) use.

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Tool Doesn’t
Respond to
Trigger
Depression
Insufficient vol-
ume of air (CFM)
to operate tool
Verify sufficient air supply to tool.
(6 CFM @ 90 PSI minimum requirement.
Moisture or other
contamination in
air supply.
Check for moisture in air line and tool air inlet.
Tool Perfor-
mance is Slow
or Sluggish
Insufficient vol-
ume of air (CFM)
to operate tool.
Verify sufficient air supply to tool.
(6 CFM @ 90 PSI minimum requirement.
Moisture or other
contamination in
air supply.
Check for moisture in air line and tool air inlet.
Air Motor is lack-
ing lubrication.
Stop use immediately and add air tool oil
directly to air inlet.
Tool Vibrates
Excessively
During Use
Out of balance
condition from
damaged Cutting
Wheel
Stop use immediately, check for and replace
cracked or broken Cutting Wheel.
Loose Wheel
Retaining Screw
Tighten loose Socket Head Wheel Retaining Screw
Tool emits excessive noise during use.
TROUBLESHOOTING

© Copyright 2017 Easthill Group, Inc. 7/17 Instruction item #31741Q 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/31741manual
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
ADDITIONAL ITEMS
#28105 Pack of 5, 3” x 3/8” x 1/16” Cut-Off Wheels