Dynabrade 50302, 50306, 52560, 52563, 52561 Safety, Operation And Maintenance
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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: Right-Angle Grinders are ideal for removal of material using Reinforced Type 27 grinding wheels.
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 right-angle grinder operators with safety instructions and training for safe use of tools and accessories.
Accessory Selection:
• Use only Reinforced Type 27 grinding wheels with the proper arbor diameter.
• 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.
• 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 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 are worn, damaged or have been subject to a wheel
breaking must be replaced. (continued on next page)
Parts Page Reorder No. PD09•37
Effective July, 2009
Supersedes PD02•23
1hp Right Angle 4", 41/2"- 5" Grinders
Governor Controlled
Air Tool Manual – Safety, Operation and Maintenance
Models:
50302 – 12,000 RPM, 4" (100mm)
Depressed Center Wheel Grinder
(5/8" Arbor Hole)
50306 – 12,000 RPM, 4
1
/2"- 5" (115- 125 mm)
Depressed Center Wheel Grinder
(7/8" Arbor Hole)
SAVE THIS DOCUMENT, EDUCATE ALL PERSONNEL
SAFETY LEGEND
G
Read and understand tool manual before
work starts to reduce risk of injury to
operator, visitors, and tool.
Eye protection must be worn at all times,
eye protection to conform to ANSI Z87.1.
Respiratory protection to be used when exposed to
contaminants that exceed the applicable threshold
limit values required by law.
Practice safety requirements. Work alert,
have proper attire, and do not operate tools under
the influence of alcohol or drugs.
Ear protection to be worn when exposure to sound,
exceeds the limits of applicable Federal, State or
local statues, ordinances and/or regulations.
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 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.
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
For Serial No. 08E1000A and Higher
WARNIN
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
WARNING
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 Tool
Air Compressor
and Receiver
Drain Valve
Air Hose
Air Flow
Refrigerated
Air Dryer
2
Filter
Regulator
Lubricator
90 PSIG
(6.2 Bar)
OPERATING INSTRUCTIONS (continued)
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.
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 WHEEL, after all tool repairs and whenever a grinder 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.
• 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, make sure that no one is in the unguarded plane of the wheel before starting the grinder. IN A PROTECTED AREA, test run the wheel
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 wheel at its free speed (RPM) in a protected area for at least one minute before applying the wheel to the work.
• 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.
• This tool has rear exhaust. Exhaust may contain lubricants, vane material, bearing grease, and other materials flushed thru the tool.
Warning: Grinding certain materials can create explosive dust. It is the employers responsibility to notify the user of acceptable dust levels.
• Grinding 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.
Report to your supervisor any condition of the tool, accessories, or operation you consider unsafe.
Air System
•
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.
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TYPE 27 Wheel Mounting
• With power source disconnected from the air tool.
• Clean spindle and flange mounting surfaces. Inspect for nicks, cuts and sharp edges.
• Install drive flange with raised boss facing outward. Engage bottom flange slot and spindle flats on Model 50306.
• Check for flange flatness and runout by rotating spindle and drive flange together.
• Install reinforced type 27 depressed center wheel over spindle thread and over raised boss on flange.
• Install outer flange nut with raised boss facing toward abrasive wheel and secure flange firmly against the wheel using
94925 Pin Wrench (provided).
• Check for wheel firmness by holding the spindle and pulling on the edge of the wheel in the tightening direction.
Caution: Over tightening the outer flange nut can cause damage to the wheel and/or flanges. For thin wheel designs, install
outer flange nut with raised boss facing outward and secure flange firmly against the wheel. Using 94925 Pin
Wrench (provided).
• Use only Dynabrade flanges: Model 50302: (2) 50359 Flanges for 4" wheels with 5/8" arbor holes.
Model 50306: 50306 & 53697 Flanges for 4
1
/2" - 5" wheels with 7/8" arbor holes.
Side View
Right Angle Housing
Driving Flange
Outer Flange Nut
Spindle
Reinforced
Type 27 Wheel
Safety Guard
1 DROP/MIN.
20 SCFM
LUBRICATOR SETTING
90 PSIG MAX
(6.2 Bar)
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 Filter-Regulator-Lubricator (FRL) – Provides accurate
air pressure regulation and two stage filtration of water contaminates.
•
Lubricate wick system through the angle gear oil fitting with 2-3 plunges for every 8 hours of use, to achieve maximum gear life. Important: Use only
the recommended angle gear oil for the wick system. Do not contaminate the wick with any other oil or grease product (order 95848 Gear
Oil and 95541 Gun).
•
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 right-angle grinder using a tachometer. This governor controlled right-angle 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.
•
Inspect flanges regularly for nicks, cuts, sharp edges, flatness and runout. Replace damaged or worn flanges with genuine Dynabrade flanges.
•
Inspect wheel guard for wear or damage. Guards that are bent and severely worn or subject to a wheel breakage must be replaced.
•
Inspect grinding wheels before mounting. Do not mount wheels that are damaged or cracked.
•
Check grinding wheel - speed rating. Rating on wheel must be greater than the tool speed marked on the housing.
•
If grinding wheel 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, 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. 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 reinforced type 27 depressed center wheel from exposure to water, solvents, high humidity, freezing temperature and
extreme temperature changes.
•
DO NOT USE type 27 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.
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.
Machine Specifications
3
Model Motor Tool Sound Air Flow Rate Air Pressure Wheel Weight Length Height
Number hp (W) RPM Level SCFM (LPM) PSIG (Bars) Diameter Pound (kg) Inch (mm) Inch (mm)
50302 1 (746) 12,000 80 dB(A) 40 (1138) 90 (6.2) 4" 4.5 (2.0) 11-3/4 (299) 3-5/8 (92)
50306 1 (746) 12,000 80 dB(A) 40 (1138) 90 (6.2) 4
1
/2" -5" 4.8 (2.2) 11-3/4 (299) 3-13/16 (98)
Additional Specifications: Air Inlet Thread 3/8" NPT • Hose I.D. Size 3/8" (10 mm) • Air Flow Rate Based At Max HP. • Air Pressure 90 PSIG Max
Lifetime Warranty
All Dynabrade portable pneumatic power tools are rigorously inspected and performance tested in our factory before shipping to our customers. If a
Dynabrade tool develops a performance problem and an inherent defect is found during normal use and service, Dynabrade will warrant this tool against
defects in workmanship and materials for the lifetime of the tool. Upon examination and review at our factory, Dynabrade shall confirm that the tool qualifies
for warranty status, and will repair or replace the tool at no charge to the customer. Normally wearable parts and products are NOT covered under this
warranty. Uncovered items include bearings, contact wheels, rotor blades, regulators, valve stems, levers, shrouds, guards, O-rings, seals, gaskets and other
wearable parts. Dynabrade’s warranty policy is contingent upon proper use of our tools in accordance with factory recommendations, instructions and safety
practices. It shall not apply to equipment that has been subjected to misuse, negligence, accident or tampering in any way so as to affect its normal
performance. To activate lifetime warranty, customer must register each tool at www.dynabrade.com. Dynabrade will not honor lifetime warranty on
unregistered tools. A one-year warranty will be honored on all unregistered portable pneumatic power tools. Lifetime warranty applies only to portable
pneumatic tools manufactured by Dynabrade, Inc. in the USA. Lifetime warranty applies only to the original tool owner; warranty is non-transferable.
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