Dynabrade 51450 User manual

Models:
51450 — 3,400 RPM, 5/8"-11 male spindle
51451 — 4,500 RPM, 5/8"-11 male spindle
51454 –– 3,400 RPM, M14 male spindle
51455 –– 4,500 RPM, M14 male spindle
Air Motor and Machine Parts
Parts Page Reorder No. PD02•21
Effective April, 2002
Supersedes PD98•19
.7 Hp/7° Buffer
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.
1
56
79
10 5
2
11
12
13
14 17
28
29 30
31 32
33
35
36
37
38
39
40
41
42
43
44
23 24
25
26
27
18
19 20
15
Index Key
No. Part # Description
153163 Handle Assembly
213005 Collar
313432 Spindle Cover
414355 Spindle 5/8"-11 male
07182 Spindle M14 x 2 male
502552 Bearing (2)
653191 Ring Gear
704026 Bearing (4)
853193 3,400 RPM Gear (2)
53195 4,500 RPM Gear (2)
953180 Planetary Carrier
10 53182 Gear Shaft (2)
11 01007 Bearing
12 01121 Shim Pack (3/pkg.)
13 53183 Front Bearing Plate
14 01010 Spacer
15 04017 3,400 RPM Rotor
04009 4,500 RPM Rotor
16 01185 Blades (4/pkg.)
17 01028 Cylinder
18 50767 Pin
19 13440 Rear Bearing Plate
20 02649 Bearing
21 04014 Screw
22 01041 Grease Fitting
23 51462 Housing Assy. – 51450
51463 Housing Assy. – 51451
51456 Housing Assy. – 51454
51457 Housing Assy. – 51455
(includes 13436 Bushing
& 01041 Grease Fitting)
24 01089 Throttle Lever Assembly
25 01017 Pin
26 13436 Bushing
27 13438 Handle Grip
28 13435 Valve Stem
29 13439 Ball
30 07145 Spring
31 13437 Speed Regulator
32 01024 O-Ring
33 13428 Packing
34 13427 Regulator Plug
35 01565 3,400 RPM Air Cntrl Ring
01564 4,500 RPM Air Cntrl Ring
36 95438 O-Ring
37 95711 Retaining Ring
38 94521 Muffler Base
39 94528 Muffler
40 94522 Muffler Cap
41 95375 O-Ring
42 94526 Spacer
43 94523 Inlet Adapter
44 94519 Muffler Assembly
28 N•m T
8.5 N•m T
23 N•m T
17 N•m
T
Adhesive: A2= Loctite #271
A6= Loctite #380
A8= Loctite #567
Torque: N•m x 8.85 = In. - lbs.
Grease: G1= Lubriplate 630 AA
Oil: O1= Air Lube
O
A
T
G
KEY
A2
A8
A8
A6
O1
O1
G1
A8
G1
3
8
21
4
34
16 22

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.
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.
Maintenance Instructions:
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. Dynabrade recommends one drop of air lube per minute for each 10 SCFM (example: if
the tool specifications state 40 SCFM, set the drip rate of your filter-lubricator at 4 drops per minute).
Dynabrade Air Lube (P/N 95842: 1 pt. 473 ml.) is recommended.
4. 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 Line Filter-Regulator-Lubricator — Provides accurate air
pressure regulation, two-stage filtration of water contaminants and micro-mist lubrication of pneumatic components.
Operates up to 100 SCFM @ 100 PSIG has 1/2" NPT female ports.
5. Lubricate planetary gears through the gear casing grease fitting with 2-3 plunges for every 50 hours of use, to achieve maximum gear life (order
95542 Grease and 95541 Gun).
6. Use only genuine Dynabrade replacement parts. To reorder replacement parts, specify the Model #, Serial # and RPM of your machine.
7. A Motor Tune-Up Kit (P/N 96234) is available which includes assorted parts to help maintain motor in peak operating condition. Please refer to
Dynabrade's Preventative Maintenance Schedule for a guide to expectant life of component parts.
8. 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.
• 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.
2
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 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)
51450 .7 (522) 3,400 78 dB(A) 6/46 (1,303) 90 (6.2) 5/8"-11 male 4.1 (1.9) 10-4/5 (275) 5-4/5 (148)
51451 .7 (522) 4,500 79 dB(A) 6/46 (1,303) 90 (6.2) 5/8"-11 male 4.1 (1.9) 10-4/5 (275) 5-4/5 (148)
51454 .7 (522) 3,400 78 dB(A) 6/46 (1,303) 90 (6.2) M14 x 2 male 4.1 (1.9) 10-4/5 (275) 5-4/5 (148)
51455 .7 (522) 4,500 79 dB(A) 6/46 (1,303) 90 (6.2) M14 x 2 male 4.1 (1.9) 10-4/5 (275) 5-4/5 (148)
Additional Specifications: Air Inlet Thread 1/4" NPT • Hose I.D. Size 3/8" or 10mm
Safety Instructions:
Products offered by Dynabrade should not be converted or otherwise altered
from original design without expressed written consent from Dynabrade, Inc.

Disassembly/Assembly Instructions - .7 Hp Buffer
Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.
Please refer to parts breakdown for part identification.
Motor Disassembly:
1. Disconnect tool from power source. Remove buffing pad or accessory from spindle.
2. Secure motor housing using padded vise with motor spindle facing upwards.
3. Using an adjustable pin wrench, remove 13432 Spindle Cover.
4. Remove 04014 Set Screw from housing.
6. Pull 14355 Spindle and planetary carrier assembly from housing.
7. Press planetary carrier assembly from rear 02552 Bearing. Remove ring gear and gears from 53180 Planetary Carrier.
8. Secure planetary carrier in vise and remove 14355 Arbor Adapter. Press carrier from front 02552 Bearing.
9. Grab onto rotor/pinion and pull motor assembly from motor housing.
10. Press rotor/pinion from 13440 Rear Bearing Plate. Press 02649 Rear Bearing from rear bearing plate.
11. Remove 01028 Cylinder and 01185 Rotor Blades from rotor.
12. Press rotor pinion assembly through 01007 Front Bearing and 53183 Front Bearing Plate.
Motor Disassembly Complete.
Housing Disassembly:
1. Position housing in padded vise with air inlet facing up.
2. Remove air fitting by securing 94523 Inlet Adapter with a wrench and twist air fitting from inlet adapter.
Important: 94523 Inlet Adapter must be secured before attempting to remove air fitting to avoid damaging valve body housing.
3. Remove 94523 Inlet Adapter.
4. Remove 95711 Retaining Ring from inlet adapter and separate 94521 Muffler Base from 94522 Muffler Cap. Remove 94528 Felt Muffler.
5. Remove air control ring from housing.
6. Using a 2.5mm drift pin, tap 01017 Pin from housing and remove throttle lever assembly.
7. Remove 13427 Plug. Pull 13437 Speed Regulator from housing and remove 01024 O-Rings, 07145 Spring, 13439 Ball, and 13435 Valve Stem.
Disassembly Complete.
Motor Assembly:
Important: Be sure parts are clean and in good repair before assembling. Follow all grease, oil, and torque specifications.
1. Place rotor/pinion in padded vise with threaded spindle facing upwards.
2. Slip 01010 Spacer onto rotor/pinion.
3. Place a .002" shim into 53183 Front Bearing Plate as an initial spacing and slip 01007 Bearing into plate.
Note: 01121 Shim Pack contains .001" and .002" shims.
4. Press bearing/bearing plate assembly onto rotor.
5. Check clearance between rotor and bearing plate by using a .001" feeler gauge. Clearance should be at .001" to .0015". Adjust clearance by repeating
steps 2-4 with different shim if necessary.
6. Once proper rotor gap clearance is achieved, install well lubricated 01185 Blades (4) into rotor slots. Dynabrade recommends using their 95842 Air Lube.
7. Install cylinder over rotor/pinion. Be sure air inlet holes of cylinder face away from 53183 Front Bearing Plate.
8. Press 02649 Rear Bearing into 13440 Rear Bearing Plate. Press bearing/bearing plate assembly onto rotor. Be sure that pin and air inlet holes line up
with pin slot and air inlet holes in cylinder. Important: Fit must be snug between bearing plates and cylinder. If too tight, rotor will not turn freely.
Rotor must then be lightly tapped at press fit end so it will turn freely while still maintaining a snug fit. A loose fit will not achieve the proper preload
of motor bearings.
10. Secure motor housing in padded vise so motor cavity faces upwards. Install motor assembly into housing. Be sure motor inlet is facing the handle and
it drops all the way into housing.
11. Press front 02552 Bearing onto front end of 53180 Planetary Carrier.
12. Apply #271 Loctite®to 14355 Arbor Adapter and install onto 53180 Planetary Carrier (torque 17.0 N•m/150 in. - lbs.).
13. Install gears, 04026 Bearings and 53182 Gear Shafts onto planetary carrier.
14. Slip 53191 Ring Gear over gears and press rear 02552 Bearing onto planetary carrier.
15. Apply two drops of #271 Loctite®to threads of 13432 Spindle Cover.
16. Apply #271 Loctite®to 13432 Spindle Cover and install onto housing, to secure motor (torque 28 N•m/250 in. - lbs.).
Motor Assembly Complete.
Housing Assembly:
1. Install 13438 Handle Grip.
2. Insert 13435 Valve Stem through housing and into hole in 13436 Bushing.
3. Insert 13439 Ball, 07145 Spring, 13437 Speed Regulator with 01024 O-Ring in place.
4. Install 13428 Packing onto 13427 Regulator Plug. Secure plug in place torque (8.5 N•m/75 in. - lbs.).
5. Insert 94528 Muffler into 94522 Muffler Cap. Install 94521 Muffler Base onto muffler cap.
6. Install 95438 O-Ring into groove on muffler base. Place 95375 O-Ring and 94526 Spacer into recessed area of muffler cap.
(continued on next page)
3

Dynaswivel
®
Swivels 360° at two locations which allows an
air hose to drop straight to the floor, no matter
how the tool is held.
Note: For proper connection to a 1/4" NPT
a threaded reducing bushing is required.
• 95461 3/8" NPT.
96234 Tune-Up Kit
• Includes assorted parts to help
maintain and repair motor.
95542 Grease 10 oz.
• Multi-purpose grease for all types of bearings, cams, gears.
• High film strength; excellent resistance to water, stream, etc.
• Workable range 0˚F to 300˚F.
95541 Push-type Grease Gun
• One-hand operation.
Dynabrade Air Lube
• Formulated for pneumatic equipment.
• 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.
95842: 1pt. (437 ml)
95843: 1 gal. (3.8 L)
Disassembly/Assembly Instructions (continued)
7. Slip 94523 Inlet Adapter through muffler assembly and install 95711 Retainer Ring into groove on inlet adapter.
8. Install air control ring into housing.
9. Apply Loctite®#567 to threads of 94523 Inlet Adapter and install entire muffler assembly onto housing inlet (torque 23.0 N•m/200 in. - lbs.).
10. Replace air fitting. Secure inlet adapter with a wrench before tightening air fitting.
11. Install throttle lever and 01017 Pin.
Tool Assembly Complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important: Motor should now be tested for proper operation at 90 PSIG. If motor does not operate properly or operates at a higher RPM than marked on the
tool, the tool should be serviced to correct the cause before use. Before operating, place 2-3 drops of Dynabrade Air Lube (P/N 95842) directly into air inlet
with throttle lever depressed. Operate tool for 30 seconds to determine if tool is operating properly and to allow lubricating oils to properly penetrate motor.
Loctite®is a registered trademark of Loctite Corp.
95281 Wrench – 19mm
DYNABRADE
®
DYNABRADE, INC., 8989 Sheridan Drive • Clarence, NY 14031-1490 • Phone: [phone] • Fax: [phone] • International Fax: [phone]
DYNABRADE EUROPE S.àr.l., Zone Artisanale • L-5485 Wormeldange—Haut, Luxembourg • Telephone: [phone] • Fax: [phone]
© DYNABRADE, INC., 2004 PRINTED IN USA PD02.21_Rev.1_03/04
Visit Our Web Site: www.dynabrade.com Email: [email protected]
Optional Accessories