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Parts Page Reorder No. PD09•52

Effective October, 2009

.7 hp Vacuum Cut-Off Tool

For 

ø

3" (76 mm) Mounted Diamond Wheels

Air Tool Manual – Safety, Operation and Maintenance

Model:

52418

– 20,000 RPM
– 3/8" Collet
– Accepts 3" Mounted 

Diamond Wheels with 3/8"Mandrel

– 1in. O.D. Vacuum Port

SAVE THIS DOCUMENT, EDUCATE ALL PERSONNEL

SAFETY INSTRUCTIONS

Carefully Read all instructions before operating or servicing any Dynabrade

®

Abrasive Power Tool.

Products offered by Dynabrade are not to be modified, converted or otherwise altered from the original design without expressed written consent from Dynabrade, Inc.

Tool Intent: 

.7hp 3" Vacuum Cut-Off Tool is ideal for trimming fiberglass, silicone, quartz, stone, composites, ceramic and carbon graphite. An appropriate external vacuum source is required that is

suitable for material being processed.

Do Not use tool for anything other than its intended applications.

This power tool is not intended for use in potentially explosive atmospheres and is not insulated against contact with electrical power.

Training: 

Proper care, maintenance, and storage of your air tools will maximize their performance.

• Employer's Responsibility  – Provide .7 hp 3" Vacuum Cut-Off Tool operators with safety instructions and training for safe use of tools and accessories.

Accessory Selection:

• USE ONLY 3" Mounted Diamond Impregnated Steel Wheels with 3/8" diameter mandrel with 2 in. minimum length.
• DO NOT use router bits.
• Abrasive/accessory RPM (speed) rating MUST be approved for AT LEAST the tool RPM rating.
• Before mounting an accessory, visually inspect for defects. Do not use defective accessories.
• USE ONLY recommended accessories. Reference Dynabrade catalog and this tool manual.

SAFETY LEGEND

WARNING

Read and understand this tool manual before operating your air tool. Follow all safety rules for the protection of operating person-
nel as well as adjacent areas. Always operate, inspect and maintain this tool in accordance with the American National Standards
Institute (ANSI) Safety Code for Portable Air Tools – B186.1. For additional safety information, refer to Safety Requirements for the
Use, Care and Protection of Abrasive Wheels – ANSI B7.1, Code of Federal Regulation – CFR 29 Part 1910, European Committee for
Standards (EN) Hand Held Non-Electric Power Tools – Safety Requirements and applicable State and Local Regulations.

WARNING

Some dust created by sanding, grinding, drilling, and other construction activities contain chemicals known to cause cancer, birth 
defects or other reproductive harm. Some examples of these chemicals are:

Lead from lead-based paints

Crystalline silica from bricks and cement and other masonry products

Arsenic and chromium from chemically treated lumber

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well
ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles.

FIND THE MOST CURRENT OFFERING OF SUPPORT DOCUMENTS AND ACCESSORIES @ WWW.DYNABRADE.COM

WARNING

Read and understand tool manual before

work starts to reduce risk of injury to

operator, visitors, and tool.

WARNING

Eye protection must be worn at all times,

eye protection to conform to ANSI Z87.1.

WARNING

Respiratory protection to be used when exposed to

contaminants that exceed the applicable threshold

limit values required by law.

WARNING

Air line hazard, pressurized supply lines and flexible

hoses can cause serious injury. Do not use damaged,

frayed or deteriorated air hoses and fittings.

WARNING

Practice safety requirements. Work alert,

have proper attire, and do not operate tools under

the influence of alcohol or drugs.

WARNING

Ear protection to be worn when exposure to sound,

exceeds the limits of applicable Federal, State or

local statues, ordinances and/or regulations.

Summary of Contents for 52418

Page 1: ...g person nel as well as adjacent areas Always operate inspect and maintain this tool in accordance with the American National Standards Institute ANSI Safety Code for Portable Air Tools B186 1 For additional safety information refer to Safety Requirements for the Use Care and Protection of Abrasive Wheels ANSI B7 1 Code of Federal Regulation CFR 29 Part 1910 European Committee for Standards EN Han...

Page 2: ... jewelry is properly restrained Secure inlet bushing on air tool with a wrench before attempting to install the air fitting to avoid damaging housing assembly BEFORE MOUNTING A WHEEL after all tool repairs and whenever a cut off tool is issued for use check tool RPM speed with tachometer with air pressure set at 90 PSIG while the tool is running If tool is operating at a higher speed than the RPM ...

Page 3: ...tions Tag Reorder No 95903 for safety information After maintenance is performed on tool add a few drops of Dynabrade Air Lube P N 95842 to the air line and start the tool a few times to lubricate air motor Check for tool vibration before mounting abrasive wheel accessory Handling and Storage Use of tool rests and storage hangers are recommended Protect tool inlet from debris see Notice below DO N...

Page 4: ...95558 Retaining Ring 27 01477 Valve Stem 28 95730 O Ring 29 01024 O Ring 30 01247 Speed Regulator Assy 31 01464 Seal 32 01472 Tip Valve 33 01468 Spring 34 01564 Air Control Ring 35 95711 Retaining Ring 36 95438 O Ring 37 94521 Muffler Base 38 94524 Sintered Muffler 39 94525 Felt Muffler 40 94522 Muffler Cap 41 95375 O Ring 42 94526 Spacer 43 94523 Inlet Adapter 44 94520 Muffler Assembly 45 94300 D...

Page 5: ...pacer can now be removed Motor Disassembly Complete Valve Disassembly 1 Secure the valve body housing in a vise by holding on the flats so that the air inlet is pointing up 2 Important 94523 Air Inlet must be held stationary with a wrench while removing any air fitting from the air inlet 3 Remove the 94523 Air Inlet 4 Refer to the exploded view of the 94520 Muffler on the front of this parts page ...

Page 6: ...e threads of the lock ring and install these parts onto the motor housing torque to 34 N m 300 in lbs 13 The motor can now be checked for proper adjustment With the motor housing still mounted in the vise pull up on the end of the rotor shaft while turning it back and forth apply 10 15 lbs force Perform the same procedure while pushing down on the rotor shaft with the same amount of force The roto...

Page 7: ...kg 1 T 15 01008 Bearing Plate 1 X 16 50767 Pin 2 X 17 01010 Rotor Spacer 1 X 18 01028 Cylinder 1 X 19 01185 Blade 4 pkg 1 T 20 55021 Rotor 1 X 21 01721 Bearing Plate 1 X 22 02649 Bearing 1 T 23 52623 Housing 1 X 24 01089 Safety Lock Lever 1 X 25 01017 Pin 1 L 26 95558 Retaining Ring 1 T 27 01477 Valve Stem 1 T 28 95730 O Ring 1 D 29 01024 O Ring 1 D 30 01247 Speed Regulator Assy 1 T 31 01464 Seal ...

Page 8: ...ed Mounted Wheels Mounted Wheels have 2 1 4 mandrel 93906 Continuous Rim 93907 Side Spoked 96529 Motor Tune Up Kit Includes assorted parts to help maintain and repair motor 96240 Bearing Press Tool This tool is designed to safely press a bearing into a bearing plate and onto a shaft 96213 Bearing Removal Tool This tool is designed to pass through the I D of the bearing plate and push against the I...

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