Dynabrade 52503 Important Operating, Maintenance And Safety Instructions
Models:
52503 — 2" Disc Sander
Parts Page Reorder No. PD01•76R
Effective September, 2001
Air Motor and Machine Parts
.4 Hp/7°/Rear Exhaust
Disc Sander
Always operate, inspect and maintain this tool in accordance with the Safety Code for portable air tools (ANSI B186.1) and any other applicable safety codes and regulations. Please
refer to Dynabrade
’s Warning/Safety Operating Instructions for more complete safety information. See inside for Important Operating, Maintenance and Safety Instructions.
1 51344 2" Disc Pad
2 50133 Adapter
3 01560 Exhaust Cover
4 01580 Silencer
5 02649 Bearing
6 54529 Shim Pack (3/pkg.)
7 01478 Front Bearing Plate
8 01479 Spacer
9 50767 Pin (2)
10 01480 Blades (4/pkg.)
11 01594 Rotor
12 01476 Cylinder
13 02673 Rear Bearing Plate
14 02696 Bearing
15 02679 Shield
16 01546 Housing
17 01548 Gasket
18 01461 Lock Nut
19 01558 Collar
20 95523 O-Ring
21 01470 Insert
22 01488 Housing - 52503
23 01448 Throttle Lever
01462 Safety Throttle Lever
24 12132 Pin
25 95558 Retaining Ring
26 01449 Valve Stem
27 95730 O-Ring
28 01024 O-Ring
29 01469 Speed Regulator Assy.
30 01464 Seal
31 01472 Tip Valve
32 01468 Spring
33 01568 Air Control Ring
34 95711 Retaining Ring
35 01578 Inlet Adapter
36 01486 Felt Silencer (4)
37 01379 Bronze Muffler
38 96065 O-Ring
39 01446 Air Deflector
40 95620 Retaining Ring
41 94535 Muffler Assembly
17
18
19
20 21
26
25
23
24
30 31
32
34
29
33
1
4
5
6
7
8
911
12
9131415
36 37 38
39
40
41
27
28
16
A
8
Right Hand
Threads
Left Hand Threads
Index Key
No. Part # Description
45 N•m
T
28 N•m
T
17 N•m
T
23 N•m
T
A
T
O
Adhesive: A
8
= Loctite #567
Torque: N•m x 8.85 = In. - lbs.
Oil: O
1
= Air Lube
KEY
For Serial Number 1B1000 and Higher
A
8
O
1
A
8
O
1
2
3
10
22
35
!
WARNING
Important Operating, Maintenance and Safety Instructions
Carefully read all instructions before operating or servicing any Dynabrade®Abrasive Power Tool.
Warning: Hand, wrist and arm injury may result from repetitive work motion and overexposure to vibration.
Important: All Dynabrade rotary vane air tools must be used with a Filter-Regulator-Lubricator to maintain all warranties.
Operating Instructions:
Warning: Eye, face, respiratory, sound and body protection must be worn while operating power tools. Failure to do so may result in serious injury or death.
Maintenance Instructions:
Follow safety procedures posted in workplace.
1. With power source disconnected from tool, securely fasten abrasive/ accessory on tool.
2. Install air fitting into inlet bushing of tool. Important: Secure inlet bushing of tool with a wrench before attempting to install the air fitting to avoid
damaging valve body housing.
3. Connect power source to tool. Be careful not to depress throttle lever in the process.
4. Check tool speed with tachometer. If tool is operating at a higher speed than the RPM marked on the tool or operating improperly, the tool should be
serviced to correct the cause before use.
1. Check tool speed regularly with a tachometer. If tool is operating at a higher speed than the RPM marked on the tool, the tool should be serviced to
correct the cause before use.
2. Some silencers on air tools may clog with use. Clean and replace as required.
3. All Dynabrade rotary vane air motors should be lubricated with two drops of Dynabrade Air Lube (P/N 95842: 1 pt. 473 ml.) every four hours of use.
4. It is strongly recommended that all Dynabrade rotary vane air tools be used with a Filter-Regulator-Lubricator to minimize the possibly of misuse due to
unclean air, wet air or insufficient lubrication. Dynabrade recommends the following: 11405 Air Line Filter-Regulator-Lubricator — Provides accurate air
pressure regulation, two-stage filtration of water contaminants and micro-mist lubrication of pneumatic components. Operates 40 SCFM @ 100 PSIG
has 3/8" NPT female ports.
5. Use only genuine Dynabrade replacement parts. To reorder replacement parts, specify the number and serial number of your machine.
6. A Motor Tune-Up Kit (P/N 96049) is available which includes assorted parts to help maintain motor in peak operating condition.
7. Mineral spirits are recommended when cleaning the tool and parts. Do not clean tool or parts with any solvents or oils containing acids, esters
keytones, chlorinated hydrocarbons or nitro carbons.
Safety Instructions:
Products offered by Dynabrade should not be converted or otherwise altered
from original design without expressed written consent from Dynabrade, Inc.
• Important: User of tool is responsible for following accepted safety codes such as those published by the American National Standards Institute (ANSI).
• Operate machine for one minute before application to workpiece to determine if machine is working properly and safely before work begins.
• Always disconnect power supply before changing abrasive/accessory or making machine adjustments.
• Inspect abrasives/accessories for damage or defects prior to installation on tools.
• Please refer to Dynabrade’s Warning/Safety Operating Instructions Tag (Reorder No. 95903) for more complete safety information.
• Warning: Hand, wrist and arm injury may result from repetitive work, motion and overexposure to vibration.
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 Y ear 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 Air Flow Rate Air Pressure Spindle Weight Length Height
Number HP (W) RPM Level CFM/SCFM (LPM) PSIG (Bars) Thread Pound (kg) Inch (mm) Inch (mm)
52503 .4 (298) 25,000 87 dB(A) 3/20 (510) 90 (6.2) 1/4-20" male 1.3 (.6) 7-1/2 (191) 3-3/4 (95)
Additional Specifications: Air Inlet Thread 1/4" NPT • Hose I.D. Size 1/4" or 8mm
(PD01•76R)
2
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