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Parts Page Reorder No. PD01•92

Effective October, 2001

1Hp Extension Type 1 Wheel Grinders

Governor Controlled

Air Tool Manual – Safety, Operation and Maintenance

Models:

52376 – 12,000 RPM

3" Dia. x 3/8" x 1/2" Wide
Reinforced Grinding Wheel

52377 – 15,000 RPM

3" Dia. x 3/8" x 1/2" Wide
Reinforced Grinding Wheel

52378 – 18,000 RPM

3" Dia. x 3/8" x 1/2" Wide
Reinforced Grinding Wheel

52379 – 12,000 RPM

4" Dia. x 3/8" x 1/4" Wide
Reinforced Grinding Wheel

523

80

 – 15,000 RPM

4" Dia. x 3/8" x 1/4" Wide
Reinforced Grinding Wheel

SAFETY LEGEND

WARNING

WARNING

Read and understand tool manual 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

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.

WARNING

Air line hazard, pressurized supply lines and flexible

hoses can cause serious injury. Do not use dam-

aged, frayed or deteriorated air hoses and fittings.

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 Safety
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.

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:

Abrasive Extension Type 1 Wheel Grinders are ideal for cleaning metal before welding, grind and smooth weld seams, remove imperfections, smooth surfaces
prior to painting or plating.  Ideal for foundries, welding shops, fabrication plants, steel mills and shipyards.

Do Not Use Tool For Anything Other Than Its Intended Applications.

Training:  

Proper care, maintenance, and storage of your tool and abrasive wheels will maximize performance.

• Employer's Responsibility – Provide operators with safety instructions and training for safe use of tools and accessories.

Accessory Selection:

• Only use 

reinforced

type 1 wheels.

• Abrasive/accessory RPM (speed) rating MUST be approved for AT LEAST the tool RPM rating.
• Before mounting an abrasive wheel or accessory, visually inspect for defects.  Do not use defective wheels or accessories.
• Mount only recommended accessories.  See back page of manual and Dynabrade catalog.
• Follow tool specifications before choosing size and type of accessory.
• Only use recommended fittings and air line sizes.  Air supply hoses and air hose assemblies must have a minimum working pressure rating of 150 PSIG (10 bars, g) or 150 

percent of the maximum pressure produced in the system, whichever is higher.  (See tool Machine Specifications table.)

OPERATING INSTRUCTIONS

Warning:

Always wear eye protection.  Operator of tool is responsible for following:  accepted eye, face, respiratory, hearing and body protection.
Always use wheel guard.  Make sure it is positioned to best protect the operator and make sure it is securely fastened.  Wheel guards that have been subject to a
wheel breaking must be replaced.

(Continued on next page)

SAVE THIS DOCUMENT, EDUCATE ALL PERSONNEL

Summary of Contents for 52376

Page 1: ...c Power Tools Safety Requirements and applicable State and Local Regulations SAFETY INSTRUCTIONS Carefully Read all instructions before operating or servicing any Dynabrade Abrasive Power Tool Product...

Page 2: ...re that no one is in the unguarded plane of the wheel rotation Increase the speed of the tool gradually The wheel must be run at free speed for at least one minute before applying the wheel to work Du...

Page 3: ...pe 1 grinding wheels from exposure to water solvents high humidity freezing temperatures and extreme temperature changes DO NOT USE type 1 grinding wheels that have been dropped or show signs of crack...

Page 4: ...tion Labels 53723 Housing Model 52376 53724 Housing Model 52377 53725 Housing Model 52378 52726 Housing Model 52379 52727 Housing Model 52380 31 96444 Pin 32 51949 Safety Lever Assembly 33 51946 Valve...

Page 5: ...an and in good repair before assembling Follow grease oil and torque specifications 1 Place 51921 Rotor into a padded vise with male thread facing upwards 2 Slip 51927 Rotor Spacer over rotor shaft an...

Page 6: ...ar see back cover for Optional Accessories with wheel adapter facing downward 2 Install 51945 Valve Seat by aligning 3 male prongs with three deep slots on insert Make certain valve seat is pressed fl...

Page 7: ...Nut 1 X 2 51964 Front Flange 1 X 3 51963 Rear Flange 1 X 4 51983 3 Guard 1 X 51984 4 Guard 1 X 5 53616 3 Spindle Adapter 1 X 53615 4 Spindle Adapter 1 X 6 96512 Retainer Ring 1 L 7 51956 Felt Seal 1...

Page 8: ...ow compared to standard plug design Plug has ported design to prevent starving of the air tool Dynabrade Air Lube Formulated for pneumatic equipment Absorbs up to 10 of its weight in water Prevents ru...

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