Dynabrade 53249 Guide

Safety, Operation and Maintenance –Save This Document and Educate All Personnel
PD13.30
October, 2013
Model Thread RPM Exhaust
53249 5/8"-11 6,000 Side
WARNING
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 Requirements for the Use, Care and Protection of Abrasive Wheels – ANSI B7.1, Compressed Air and Gas Institute (CAGI) Safety Code
for Portable Air Tools – B186.1, 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.
Find The Most Current Offering of Support Documents and Accessories at www.Dynabrade.com
Read and understand tool manual before work starts
to reduce risk of injury to operator, visitors, and tool.
Ear protection to be worn when exposure to sound,
exceeds the limits of applicable Federal, State or
local statues, ordinances and/or regulations.
Practice safety requirements.Work alert, have proper
attire, and do not operate tools under the influence
of alcohol or drugs.
Air line hazard, pressurized supply lines and flexible
hoses can cause serious injury. Do not use damaged,
frayed or deteriorated air hoses and fittings.
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.
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.
SAFETY INSTRUCTIONS
DO NOT USE Tool for Anything Other Than Its Intended Applications.
Training: Proper care, maintenance, and storage of your air tool will maximize tools performance and reduce chance for accident.
Employer's Responsibility: Provide operators with safety instructions and training for safe use of tools and accessories.
Report to Your Supervisor any Condition of the Tool, Accessories or Operation you Consider Unsafe.
Tool Intent: Depressed Center Wheel Grinders are used to grind; metal or stone surfaces using 9" (230 mm) diameter,
7/8" center hole or 5/8"-11 threaded Type 27 reinforced grinding wheels.
Carefully Read and Understand the General
and Wheel Grinder sections found in Tool
Safety and Operating Guidelines (PN00001676)
Before Handling or Using Tool.
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.
Type 27 Grinding
Wheel Sold Separately
3 hp, Depressed Center
Wheel Grinder
9" Diameter, Vertical
GRINDER

2
MAINTENANCE INSTRUCTIONS
Important: To keep tool safe, a Preventative Maintenance Program is
recommended. The program should included inspection of the tool and all
related accessories and consumables, including air lines, pressure regulators,
filters, oilers, etc. refer to CAGI B186.1 for additional maintenance information.
If accessory or tool breakage occurs, investigate failure to determine the cause
and correct before issuing tool for work. Use the following schedule as a
starting point in developing a Preventative Maintenance Program. If tool does
not operate properly (RPM, Vibration, Start/Stop) after these scheduled
checks or at any time, the tool must be repaired and corrected before returning
tool to use.
INSTALLATION
• To ensure long life and dependable service, use a Closed Loop Air System
and Filter-Regulator-Lubricator (FRL) as diagramed below.
• Each tool should have its own dedicated hose connected to an air supply
FRL. Quick disconnects should be installed at the FRL in an effort to reduce
contamination into the tool. Securely affix all fittings and hose assemblies.
• 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:
1pt/473ml) is recommended.
MAINTENANCE SCHEDULE
Daily (every 8 hours):
• Inspect tool and accessories for damage or broken parts. Replace items
as necessary to ensure proper operation and safety.
Lubricate motor as recommended. Use Dynabrade Air Lube (P/N
95842: 1 pt/473 ml) 10W/NR. (1 drop/minute of air lube per 20 SCFM.)
• Check air line pressure with a gage. (MAX. 90 PSIG or 6.2 Bar operating
pressure at the air inlet of the tool.)
Right angled gear and wick system through gear case fitting with 3
plunges of gear oil (P/N 95848) and grease gun (P/N 95541). (Prime
grease gun prior to use.)
• Check tool for proper operation: If operating improperly or demonstrates
unusual vibration, the tool must be serviced and problem corrected before
further use.
Every 20 Hours or Once a Week Which Ever Comes First:
• Check free speed of tool without the abrasive accessory mounted. Measure
RPM (speed) with tachometer and with air pressure set at 90 PSIG while the
tool is running. If a governed tool is operating at a higher speed than the
RPM marked on the tool housing, the tool must be serviced and corrected
before use. A non-governed tool may exceed the RPM marked on the tool
by 10% when operated at free speed with no accessories.
• If tool is running fast look for worn, damaged or missing governors, air
control rings and silencers. Special care must be taken when servicing
governors and speed control devices. Injection molded governor assemblies
are non-serviceable and must be replaced.
• If tool is running slow look for clogged inlet screen, air stream, silencer(s)
or a malfunctioning governor (see concerns for servicing governors).
Service as required.
Every 50 Hours:
Lubricate planetary gears through gear case grease fitting with 3
plunges of grease (P/N 95542) and grease gun (P/N 95541). (Prime
grease gun prior to greasing.)
See Page 4 for any Additional Maintenance Information
REPAIR
• Use only genuine Dynabrade replacement parts to ensure quality. To order
replacement parts, specify Model#, Serial# and RPM of your air tool.
• 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 is available which includes high wear and medium
wear motor parts.
• Air tool markings must be kept legible at all times, if not, reorder housing
and replace. User is responsible for maintaining specification information.
After maintenance is performed on tool, add a few drops of
Dynabrade Air Lube (P/N 95842) to the tool inlet and start the tool
a few times to lubricate air motor. Verify RPM (per 20 hr maintenance
schedule), vibration and operation.
HANDLING & STORAGE
• Use of tool rests, hangers and/or balancers is recommended.
• Protect tool inlet from debris (see Notice).
• DO NOT carry tool by air hose or near the tool throttle lever.
• Store accessories in protective racks or compartments to prevent damage.
• Follow the handling instructions outlined in the operating instructions when
carrying the tool and when changing accessories.
• Protect accessories from exposure to water, solvents, high humidity,
freezing temperature and extreme temperature changes.
END OF USE/ DISPOSAL
When tool has reached its end of useful service, disassemble tool into its
primary components (i.e. steel, aluminum and plastic part) and recycle or discard
per local, state and/or federal regulations as to not harm the environment.
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.
Filter
Regulator
Lubricator
90 PSIG
(6.2 Bar)
To Tool Station
Ball
Valve
Ball
Valve
Filter
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
1DROP/MIN.
20 SCFM
LUBRICATOR SETTING
• Dynabrade Air Power Tools are designed to operate at 90 PSIG
(6.2 Bar) 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. 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.
➤
➤
➤
➤
➤
AIR SYSTEM
Closed Loop Pipe System, Sloped in Direction of Air Flow
O
W
G
O

A
1
T
25
A
8
8
T
45
A
2
T
50
O
1
A
6
O
1
O
1
T
17
T
28
A
9.8
10
9.9
12 13
15.6
15.1
15.7
15.9
15.8
14
9.5
9.2
7.13
7.7
7.3
5
4
1
3
2
7.1
6
7.2
7.4
7.5
7.9
7.10
7.10.1
7.11
7.12
8
9.10
9.1
9.4
9.6
7.6
11
15.6.1
9.3
9.7
7.8
T
17
10.1
T
8.5
19
18 17
16
PROPER ORIENTATION
OF SPRING WASHER
20
22
21
2
A
2
T
56
O
1
15.3 15.4
15.5
15.2
See Pg.4
Governor
Details
Orient Slot on
Pins to Face
Upward
Depressed Center Wheel Grinder
Complete Assembly
Model
53249 - 6,000 RPM
3
AR – “As Required”
ITEM P/N DESCRIPTION QTY.
1 07139 FLANGE 1
2 11399 WHEEL ADAPTER KIT (INC. 07139 FlANGE) 1
3 50508 SCREW 4
4 95757 WASHER 4
5 55230 9" (230 mm) GUARD ASSEMBLY 1
6 95881 O-RING 1
7 02415 MOTOR ASSEMBLY 1
7.1 55236 NUT 1
7.2 01825 BEARING 1
7.3 52469 SHIM - 0.06 MM THK AR
7.4 52470 SHIM - 1.9 MM THK AR
7.5 55203 FRONT BEARING PLATE 1
7.6 95240 PIN 1
7.7 55223 SPACER 1
7.8 55200 ROTOR 1
7.9 55204 VANE (4/PKG) 1
7.10 55201 CYLINDER ASSEMBLY 1
7.10.1 01673 PIN 2
7.11 55202 REAR BEARING PLATE 1
7.12 55216 WASHER 1
7.13 02552 BEARING 1
8 95880 O-RING 1
9.1 55227 GOVERNOR BODY 1
9.2 95578 PIN 3
9.3 55213 GOVERNOR WEIGHT - 53249 2
9.4 95240 PIN 1
9.5 55206 GOVERNOR VALVE 1
9.6 95337 GOVERNOR SHIM - 0.8 MM THK AR
9.7 95915 GOVERNOR SHIM - 0.4 MM THK AR
9.8 55209 SPRING 1
9.9 55207 GOVERNOR CAP 1
9.10 55218 OVERSPEED SHUT-OFF RING - 53249 1
10 02459 HOUSING ASSEMBLY - 53249 1
10.1 96381 GRINDER LABEL 1
11 52496 PACKING 1
12 52495 CUP NUT 1
13 52491 BUSHING 1
14 01746 O'RING 1
15 52441 THROTTLE HANDLE ASSEMBLY 1
15.1 07136 HANDLE GRIP 1
15.2 52494 THROTTLE HANDLE (INC. 07142 BUSHING) 1
15.3 01953 SAFETY LOCK LEVER 1
15.4 01017 PIN 1
15.5 01697 INLET BUSHING ASSEMBLY 1
15.6 07168 VALVE STEM ASSEMBLY 1
15.6.1 96577 O'RING 1
15.7 07145 SPRING 1
15.8 07146 PACKING 1
15.9 07147 PLUG 1
16 52169 HANDLE ASSEMBLY 1
17 96274 SCREW 2
18 01791 WASHER 2
19 52180 EXHAUST CLAMP 1
20 52164 EXHAUST COVER 1
21 55245 SILENCER 1
22 52165 GASKET 1
— 95304 24 MM WRENCH 1
Adhesive: A1= Loctite #609
A2= Loctite #271
A6= Loctite #380
A8= Loctite #567
Oil: O1= Air Lube
O
A
T
Tx
KEY
Always follow adhesive manufacturers
cleaning and priming recommendations.
Torque: N•m x 8.85 = lb•in.
X = Torque Value (N•m)

DYNABRADE, INC. www.dynabrade.com
8989 Sheridan Drive • Clarence, NY 14031-1419 • Phone: [phone] • Fax: [phone] • International Fax: [phone]
© DYNABRADE, INC., 2013 PRINTED IN USA PD13.30
MACHINE SPECIFICATIONS
LIFETIME WARRANTY
To validate Dynabrade Lifetime Warranty, you must register each tool at: www.dynabrade.com. Registration of each tool at website is required.
Dynabrade will not honor Lifetime Warranty on unregistered tools. Please view the entire Lifetime Warranty Policy at : www.dynabrade.com.
Additional Specifications: Air Inlet Thread 1/2" NPT • Hose I.D. 1/2" (13 mm)
Sound Level is the pressure measurement according to the method outlined in ISO regulation ISO-15744
Model Speed Power Sound Air Consumption Wheel Size Weight Length Height
53249 6,000 RPM 3 hp (2237 W) 85 db(A) 87 SCFM (2,464 LPM) 9" Dia. (230 mm) 11.4 lb. (5.2 kg) 9.5" (241 mm) 7.2" (182 mm)
OPTIONAL ACCESSORIES
OVERSPEED SHUT-OFF RING
If the tool stops suddenly or does not reach the rated tool speed, the overspeed shut-off ring may have activated, closing off the inlet air supply.
The tool must be serviced to correct the problem and the overspeed shut-off ring must be properly reinstalled for safe use.
DANGER
IMPROPER INSTALLATION OR SERVICING OF OVERSPEED SHUT-OFF RING MAY RESULT IN SERIOUS INJURY OR DEATH.
BEST SERVICED BY FACTORY
GOVERNOR ASSEMBLY PROPER
ORIENTATION OF OVERSPEED
SHUT-OFF RING
Install shut-off ring over both tab features on the governor body
with slot feature centered on the PIN.
Flat Side
Tab Pin
Governor
Body
Overspeed
Shut-Off Ring
Bearing
Plate
Slot
Government Printing Office (GPO)
Superintendent of Documents • Attn: New Orders
P.O. Box 371954 • Pittsburgh, PA 15250-7954 • Tel: [phone]
International Organization of Standards (ISO)
Case postale 56 • CH-1211 Geneva 20
Tel: + 41 22 749 01 11 • Fax: + 41 22 749 09 47
American National Standards Institute (ANSI)
1899 L Street, NW, 11th Floor • Washington, DC 20036
Tel: [phone]
Compressed Air & Gas Institute (CAGI)
1300 Sumner Ave. • Cleveland, OH 44115-2851
Tel: [phone] • Fax. [phone]
REFERENCE CONTACT INFORMATION
REQUIRED ACCESSORIES
Motor Tune-Up Kit
•Includes assorted
parts to help maintain
and repair motor.
Part No. 96553
Hanger Bracket
•For use with
hangers and
suspension devices.
Part No. 55248
Dynabrade Air Lube
•Absorbs up to 10% of its weight in water.
•Prevents rust and formation of sludge.
•Keeps pneumatic tools operating longer
with greater power and less down time.
Part No. 95842
1 pt.
Part No. 95843 1 gal.
Whip hoses are required for safe operation of power tool
Air line must be between the tool and quick coupler.*
*All grinders with 4"
diameter grinding
wheels or greater
CAN NOT have a
quick coupler fitting
connected directly
at the air inlet of tool.
Tool must be directly
connected to an air
line. (ISO 11148)
Flexible Air Line - Whip Hose
•1/2" I.D.
•Fittings: 1 Female and 1 Male
Part No. 95870
5' Length
IMPORTANT
Orient flat side
of shut-off
ring toward
bearing plate.