Dynabrade 51235, 51236 Safety, Operation And Maintenance

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: Vacuum Disc Sander is ideal for coatings removal in non-ferrous metal and non-spark applications.

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 Vacuum Disc Sander operators with safety instructions and training for safe use of tools and accessories.

Accessory Selection:

• Use only 2" Locking-Type Sanding Discs.

• 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. Reference Dynabrade catalog and this tool manual.

• DO NOT USE- grinding wheels or cut-off wheels.

Parts Page Reorder No. PD08•33

Effective July, 2008

2" Dia. Vacuum Disc Sanders

Air Tool Manual – Safety, Operation and Maintenance

51235 – 25,000 RPM, Self-Generated Vacuum

1" O.D. Port
2" (51mm) Discs Maximum

51236 – 25,000 RPM, Central Vacuum

1-1/4" I.D. Threaded Hose Cuff
2" (51mm) Discs Maximum

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.

SAVE THIS DOCUMENT, EDUCATE ALL PERSONNEL

SAFETY LEGEND

WARNIN

G

WARNING

Ear protection to be worn when exposure to sound,

exceeds the limits of applicable Federal, State or

local statues, ordinances and/or regulations.

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 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.

WARNING

Practice safety requirements. Work alert,

have proper attire, and do not operate tools under

the influence of alcohol or drugs.

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

Model 51236 Shown

Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

To Tool Station

Closed Loop Pipe System

(Sloped in the direction of air flow)

Ball

Valve

Ball

Valve

Filter

Regulator

Lubricator

Air Flow

Drain
Valve

Drain
Valve

Air Compressor

and Receiver

Drain Valve

Air Hose

Air Flow

Refrigerated

Air Dryer

2

Filter

Regulator

Lubricator

90 PSIG
(6.2 Bar)

SAFETY INSTRUCTIONS CONT.

• Follow tool specifications before choosing size and type of accessory.

• Only use recommended fittings and air line sizes. Air supply hoses and air hose accessories must have a minimum working pressure 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 personal protective equipment. Operator of tool is responsible for the 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.

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

• Working end of tool has a potential of cutting and severing.

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.

• BEFORE MOUNTING A BACK-UP PAD, after all tool repairs and whenever a Vacuum Disc Sander 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 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.

• Disconnect air hose from tool when changing abrasive discs.

• 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 Vacuum Disc Sander 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. Test tool at its free speed (RPM) in a protected area for at least one minute before
applying the tool to the work.

• Release throttle lever when air supply is interrupted.

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

• Air tools are not intended for use in explosive atmospheres and are not insulated for contact with electric power sources.

• 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.

• Ensure that sparks and debris resulting from work does not create a hazard.

• USE ONLY ON NON-FERROUS MATERIALS.

• This tool has rear exhaust. Exhaust may contain lubricants, vane material, bearing grease, and other materials flushed thru the tool.

Warning: Sanding certain materials can create explosive dust. It is the employers responsibility to notify the user of acceptable dust levels.

• Sanding certain materials can cause sparks which can cause fires or explosions. It is the users responsibility to make sure the work area is free of flammable materials.

• Always use dust extraction or suppression systems which are suitable for the materials being processed.

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

Air System

1 DROP/MIN.

20 SCFM

LUBRICATOR SETTING

•

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 of moisture.
To facilitate removing moisture from air supply, the
installation of a refrigerated air dryer after the
compressor and the use of drain valves at each
tool station is recommended.

➤

➤

➤

➤

➤

➤

90 PSIG MAX

(6.2 Bar)

Air Tool

Back-Up Pad/Abrasive Mounting

• Disconnect air source from the tool.

• Secure spindle with wrench.

• Thread back-up pad onto spindle securely.

• Check mounting by rotating spindle, make certain abrasive disc is
concentrically mounted and back-up pad is not excessively warped.

Side View

Back-Up Pad

Spindle

Housing

Vacuum Port

Shroud

Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

Maintenance Instructions

Important: To keep tool safe a preventative maintenance program is recommended whenever portable power tools are used. The program should include
inspection of air supply lines, air line pressure, proper lubrication and repair of tools. Refer to ANSI B186.1 for additional maintenance information.

•

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: 10681 Air Line Filter-Regulator-Lubricator — Provides accurate air
pressure regulation, two-stage filtration of water contaminants and micro-mist lubrication of pneumatic components.

•

Dynabrade recommends one drop of air lube per minute for each 20 SCFM (example: if the tool specification states 40 SCFM, set the drip rate on the
filter-lubricator to 2 drops per minute). Dynabrade Air Lube (P/N 95842: 1 pt 473 ml) is recommended.

Routine Preventative Maintenance:

•

Check free speed of tool regularly using a tachometer and after repair and maintenance. Remove abrasive and back-up pad before testing.

•

Inspect back-up pad regularly for nicks, cuts, sharp edges, flatness and runout. Replace damaged or worn back-up pad with genuine
Dynabrade back-up pad.

•

Inspect shroud for wear or damage. Shrouds that are severely worn or subject to a disc breakage must be replaced.

•

Inspect accessories before mounting. Do not mount accessories that are damaged or cracked.

•

Check accessory - speed rating. Rating on accessory must be greater than the tool speed marked on the housing.

•

If accessory breakage occurs, investigate to determine the cause and correct before issuing tool for work.

•

Mineral spirits are recommended when cleaning the tool and parts. Do not clean tool or parts with any solvents or oils containing acids, ester,
ketone, 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 96049) 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. User is responsible for maintaining specification information i.e.:
Model #, S/N, and RPM. (See Assembly Breakdown)

•

Blow air supply hose out prior to initial use.

•

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 tool vibration before mounting abrasive wheel accessory.

Handling and Storage:

•

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

•

Protect tool inlet from debris (see Notice below).

•

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

•

Protect tool from exposure to water, solvents, high humidity, freezing temperature and extreme temperature changes.

•

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

•

Store accessories in protective racks or compartments to prevent damage.

•

Store abrasive discs prior to use at 40-50% relative humidity and 60-80˚F (15-27˚C) to reduce curling.

Machine Specifications

3

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

Number hp (W) RPM Level SCFM (LPM) Thread PSIG (Bars) Pound (kg) Inch (mm) Inch (mm)

51235 .4 (276) 25,000 92 dB(A) 20 (566) 1/4"-20 male 90 (6.2) 1.4 (.6) 9-3/4 (249) 3-7/8 (98)

51236 .4 (276) 25,000 81 dB(A) 20 (566) 1/4"-20 male 90 (6.2) 1.7 (.7) 10-1/4 (261) 3-7/8 (98)

Additional Specifications: Air Inlet Thread 1/4" NPT • Hose I.D. 1/4" (6mm)
Sound Level is the pressure measurement according to the method outlined in ISO regulation ISO-15744.
Warning: Ear protection to be worn when exposure to sound exceeds the limits of applicable Federal, State or local statutes, ordinances and/or regulations.

Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade

Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade