Dynabrade 52665, 52666, 52667, 52668, 52669 Safety, Operation And Maintenance

PD01•12

February, 2001

1 hp Die Grinder

Governor Controlled

Air Tool Manual – Safety, Operation and Maintenance

Models:

52665 – 9,000 RPM, 1/4"
52666 – 12,000 RPM, 1/4"
52667 – 15,000 RPM, 1/4"
52668 – 18,000 RPM, 1/4"
52669 – 20,000 RPM, 1/4"
52685 – 9,000 RPM, 6mm
52686 – 12,000 RPM, 6mm
52687 – 15,000 RPM, 6mm
52688 – 18,000 RPM, 6mm
52689 – 20,000 RPM, 6mm

SAFETY LEGEND

WARNING

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

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 damaged,

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 personnel
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: Die Grinders are ideal for removal and polishing of materials using deburring, cleaning and polishing accessories.

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

Training: Proper care, maintenance, and storage of your tool will maximize its performance.

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

Accessory Selection:

• 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.

• 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. (See tool Machine Specifications table.)

• DO NOT use – cut off wheels or router bits.

OPERATING INSTRUCTIONS

Warning: Always wear eye protection. Operator of tool is responsible for following: accepted eye, face, respiratory, hearing and body protection.
Caution: Hand, wrist and arm injury may result from repetitive work, motion and overexposure to vibration.

(continued on next page)

SAVE THIS DOCUMENT, EDUCATE ALL PERSONNEL

To Tool Station

Closed Loop Pipe System

(Sloped in the direction of air flow)

Ball

Valve

Ball

Valve

Filter

Coupler

Regulator

Lubricator

Air Flow

Drain
Valve

Drain
Valve

Air Tool

Air Compressor

and Receiver

Drain Valve

Air Hose

90 PSIG MAX

(6.2 Bar)

Air Flow

Refrigerated

Air Dryer

2

Filter

Regulator

Lubricator

90 PSIG

(6.2 Bar)

OPERATING INSTRUCTIONS (continued)

• Keep hand and clothing away from working end of the air tool.

Operation: Be sure that any loose clothing, hair and all 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.

• 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 marked on the tool
housing, or operating improperly, the tool must be serviced and corrected before use.

Caution: Tool RPM must never exceed abrasive/accessory RPM rating. Check accessory manufacturer for details on maximum operating speed or special

mounting instructions.

• With power source disconnected from air tool, mount recommended accessory into collet assembly.

• The mandrel diameter of the abrasive/accessory must insert freely, but not loosely, all the way to the base of the collet body before tightening the collet cap. Use
wrenches provided.

• Connect air tool to power source. Be careful NOT to depress throttle lever in the process. Do not expose air tool to inlet pressure above 90 PSIG or (6.2 Bars).

Caution: After installing the accessory, before testing or use and/or after assembling tool, the grinder must be started at a reduced speed to check for good balance.

Gradually increase tool speed. DO NOT USE if tool vibration is excessive. Correct cause, and retest to insure safe operation.

• Make sure that work area is uncluttered, and visitors are at a safe range from the tools and debris.

• Use a vise or clamping device to hold work piece firmly in place.

• Do not apply excessive force on tool or apply “rough” treatment to it.

• Always work with a firm footing, posture and proper lighting.

Report to your supervisor any condition of the tool, accessories, or operation you consider unsafe.

Air System

1 DROP/MIN.

20 SCFM

LUBRICATOR SETTING

MANDREL MOUNTING

Correctly Mounted

•

Dynabrade Air Power Tools are designed to
operate at 90 PSIG (6.2 Bar/620 kPa) maximum
air pressure at the tool inlet, when the tool is
running. Use recommended regulator to control
air pressure.

•

Ideally the air supply should be free from moisture.
Incorporating a refrigerated air dryer after the
compressor and drain valves at each tool station
(as shown) further reduces moisture from
condensation in the air supply.

Caution: The mandrel shall be inserted to the full depth of the gripping jaws of the collet. At least one-half the mandrel length shall be inserted into the collet to prevent

excessive overhang. Refer to accessory manufacturer's instructions for proper overhang. (Ref. ANSI B186.1)

Warning: Sliding the accessory’s mandrel out from the collet insert creates an “OVER HANG” condition. This practice is NOT recommended, reducing the free speed of the tool

by reducing the air pressure must be done to avoid cutting tool breakage and serious injury.

Collet Cap

Collet Body

Collet Insert

➤

➤

➤

➤

➤

➤

Maintenance Instructions

Important: A Preventative Maintenance Program is recommended whenever portable grinders are used.

•

Use only genuine Dynabrade replacement parts to insure quality. To order replacement parts, specify Model#, Serial# and RPM of your air tool.

•

It is strongly recommended that all Dynabrade rotary vane air tools be used with a Filter-Regulator-Lubricator to minimize the possibility of misuse due to
unclean air, wet air or insufficient lubrication. Dynabrade recommends the following: 11411 Air Filter-Regulator-Lubricator (FRL) – Provides accurate air
pressure regulation and two stage filtration of water contaminants. Operates 55 SCFM/1,558 LPM@90 PSIG with 1/2" NPT female ports.

•

Dynabrade recommends one drop of air lube per minute for each 10 SCFM (example: if the tool specification states 40 SCFM, set the drip rate on the
filter-lubricator to 4 drops per minute). Dynabrade Air Lube (P/N 95842: 1 pt 473 ml) is recommended.

Routine Preventative Maintenance: Check free speed of grinder using a tachometer. This governor controlled grinder should be speed checked every 20
hours of use or weekly, whichever occurs more frequently.

•

DO NOT disassemble the governor for any reason. Reorder correct speed – governor assembly (See Assembly Breakdown) and recheck free speed of
tool with a tachometer.

•

Periodically remove the collet insert and clean the inside diameter and slots from debris to keep accessories secure and reduce vibration.

•

Mineral spirits are recommended when cleaning the tool and parts. Do not clean tool or parts with any solvents or oils containing acids, esters,
ketones, chlorinated hydrocarbons or nitro carbons.

•

DO NOT clean or maintain tools with chemicals that have a low flash point (example: WD-40

®

).

•

A Motor Tune-Up Kit (P/N 96532) is available which includes high wear and medium wear motor parts.

•

Air tool labels must be kept legible at all times, if not, reorder label(s) and replace. (See Assembly Breakdown)

•

Blow air supply hose out prior to initial use.

•

DO NOT carry tool by air hose or near the tool throttle lever.

•

Visually inspect air hoses and fittings for frays, visible damage and signs of deterioration. Replace damaged or worn components.

•

Refer to Dynabrade's Warning/Safety Operating Instructions 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 excessive tool vibration.

Handling and Storage:

•

Use of tool rests, hangers and/or balancers is recommended.

•

Protect grinding wheels from exposure to water, solvents, high humidity, freezing temperatures and extreme temperature changes.

•

DO NOT USE grinding wheels that have been dropped or show signs of cracks, nicks or other defects.

•

Store accessories in protective racks or compartments to prevent damage.

Machine Specifications

3

Notice

All Dynabrade motors use the highest quality parts and metals available and are machined to exacting tolerances. The failure of quality pneumatic motors
can most often be traced to an unclean air supply or the lack of lubrication. Air pressure easily forces dirt or water contained in the air supply into motor
bearings causing early failure. It often scores the cylinder walls and the rotor blades resulting in limited efficiency and power. Our warranty obligation is
contingent upon proper use of our tools and cannot apply to equipment which has been subjected to misuse such as unclean air, wet air or a lack of
lubrication during the use of this tool.

One Year Warranty

Following the reasonable assumption that any inherent defect which might prevail in a product will become apparent to the user within one year from the
date of purchase, all equipment of our manufacture is warranted against defects in workmanship and materials under normal use and service. We shall
repair or replace at our factory, any equipment or part thereof which shall, within one year after delivery to the original purchaser, indicate upon our
examination to have been defective. Our obligation is contingent upon proper use of Dynabrade tools in accordance with factory recommendations,
instructions and safety practices. It shall not apply to equipment which has been subject to misuse, negligence, accident or tampering in any way so as to
affect its normal performance. Normally wearable parts such as bearings, contact wheels, rotor blades, etc., are not covered under this warranty.

Model Motor Motor Sound Maximum Air Flow Spindle Air Pressure Weight Length Height

Number HP (W) RPM Level CFM/SCFM (LPM) Thread PSIG (Bars) Pound (kg) Inch (mm) Inch (mm)

52665 1 (744) 9,000 82 dB(A) 5/36 (1,020) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52666 1 (744) 12,000 83 dB(A) 5/38 (1,076) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52667 1 (744) 15,000 80 dB(A) 5/39 (1,104) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52668 1 (744) 18,000 81 dB(A) 6/40 (1,133) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52669 1 (744) 20,000 80 dB(A) 6/44 (1,256) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52685 1 (744) 9,000 82 dB(A) 5/36 (1,020) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52686 1 (744) 12,000 83 dB(A) 5/38 (1,076) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52687 1 (744) 15,000 80 dB(A) 5/39 (1,104) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52688 1 (744) 18,000 81 dB(A) 6/40 (1,133) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

52689 1 (744) 20,000 80 dB(A) 6/44 (1,256) 3/8"-24 male 90 (6.2) 1.9 (.9) 8-3/4 (221) 1-7/8 (48)

Additional Specifications: Air Inlet Thread 3/8" NPT • Hose Size 3/8" or 10mm • Air Flow Rate Based At Max HP. • Air Pressure 90 PSIG Max