Dynabrade 52279 User manual

53163 – Handle (Std. on 52297, 52299)

901185 Blade (4/pkg.)

10 55021 Rotor

11 01743 Bearing Plate

12 02649 Bearing

13 01739 Housing

14 01548 Gasket

15 01461 Lock Nut

16 01558 Collar

17 95523 O-Ring

18 01470 Insert

Air Motor and Machine Parts

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.

WARNING

Models:

52279 – 15,000 RPM, 6 mm Collet

52292 – 15,000 RPM, 1/4" Collet

52293 – 18,000 RPM, 1/4" Collet

52294 – 20,000 RPM, 1/4" Collet

52295 – 18,000 RPM, 6 mm Collet

52297 – 20,000 RPM, 1/4" Collet

52298 – 20,000 RPM, 6 mm Collet

52299 – 20,000 RPM, 6 mm Collet

Parts Page Reorder No. PD01•106

Effective December, 2001

.7 Hp/Short Shank/ Rear Exhaust

Die Grinder

See reverse side for Accessories and Important Operating, Maintenance and Safety Instructions.

*Optional 01462 Safety lock lever assembly available.

Adhesive: A8= Loctite #567

Torque: N•m x 8.85 = In. - lbs.

Oil: O1= Air Lube

Shade Parts represent 94520 Muffler Assembly

Please indicate:

Model #, Serial #, and RPM

when ordering replacement parts.

A8O1

17 N•m T

34 N•m T

45 N•m

23 N•m T

1Collet Assembly

50010 1/4"

50015 6 mm

204034 Rear Exhaust Cover

301007 Bearing

401121 Shim (3/pkg.)

501008 Bearing Plate

650767 Pin (2)

701010 Spacer

801028 Cylinder

Index Key

No. Part # Description

01606 15,000 RPM

01543 18,000 RPM

01564 20,000 RPM

31 95711 Retaining ring

32 95438 O-Ring

33 94521 Muffler Base

34 94524 Sintered Muffler

35 94525 Felt Muffler

36 94522 Muffler Cap

37 95375 O-Ring

38 94526 Spacer

39 94523 Inlet Adapter

19 01448 Throttle Lever

20 12132 Pin

21 95558 Retaining Ring

22 01449 Valve Stem

23 95730 O-Ring

24 01024 O-Ring

25 01469 Regulator Assembly

26 Housing (See Chart)

27 01464 Seal

28 01472 Tip Valve

29 01468 Spring

30 Air Control Ring

Index Key

No. Part # Description

1 2 3

75 8

10 11 12 13

3938373635343332

3029

2019*

282726

KEY

Left Hand Threads A8

Model# Housing#

52279 02165

52292 02166

52293 02167

52294 02168

52295 02169

52297 02168

52298 02170

52299 02170

Right Hand Threads

(PD01•106)

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. An Air Line Filter-Regulator-Lubricator must be used with this air tool to maintain all warranties. 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, please specify the Model #, Serial # and RPM of your machine.

6. A Motor Tune-Up Kit (P/N 96045) is available which includes assorted parts to help maintain motor in peek 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.

•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 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.

Safety Instructions:

Products offered by Dynabrade should not be converted or otherwise altered

from original design without expressed written consent from Dynabrade, Inc.

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)

15,000 RPM Models .7 (522) 15,000 78 dB(A) 5/34 (963) 90 (6.2) 3/8"-24 male 2.3 (1.0) 8-1/8 (206) 5-1/2 (140)

18,000 RPM Models .7 (522) 18,000 80 dB(A) 5/34 (963) 90 (6.2) 3/8"-24 male 2.3 (1.0) 8-1/8 (206) 5-1/2 (140)

20,000 RPM Models .7 (522) 20,000 77 dB(A) 5/37 (1,048) 90 (6.2) 3/8"-24 male 2.3 (1.0) 8-1/8 (206) 5-1/2 (140)

Additional Specifications: Air Inlet Thread 1/4" NPT • Hose I.D. Size 3/8" (10 mm)

Disassembly/Assembly Instructions-.7 Hp Rear Exhaust

Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.

Notice: Dynabrade strongly recommends the use of their 52296 Repair Collar (sold separately) during assembly/disassembly activities. Failure to

use this collar will highly increase the risk of damage to the valve body of this tool. Please refer to parts breakdown for part identification.

Motor Disassembly:

1. Disconnect tool from power source.

2. Secure air tool in vise using 52296 Repair Collar. Remove Collet Cap and Collet Insert.

3. With an open-end wrench remove 04034 Rear Exhaust Cover by turning counter-clockwise.

4. Pull motor assembly out of housing.

5. Press rotor from 01743 Rear Bearing. Press 02649 Bearing from bearing plate.

6. Remove 01028 Cylinder, blades (4) and 01010 Spacer from rotor. Note: 01007 Bearing, 01008 Front Bearing Plate and spacer are a slip fit onto rotor.

Optional: To disassemble the valve body from the motor housing, peel back 01558 Collar to expose 01461 Lock Nut. Unscrew lock nut/valve body from

housing (left hand threads).

Motor Disassembly Complete.

Valve Body Disassembly:

1. Position valve body in vise using 52296 Repair Collar 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 sintered muffler and felt muffler.

5. Remove air control ring from valve body. Using needle nose pliers, remove 01468 Spring, 01472 Tip Valve and 01464 Seal.

6. Using a 2.5 mm drift pin, tap 12132 Pin from housing and remove throttle lever.

7. Remove 95558 Retaining Ring. Push 01469 Regulator from valve body.

Disassembly Complete.

Motor Assembly:

Important: Be sure parts are clean and in good repair before assembling.

1. Place rotor in padded vise with a threaded spindle facing upwards.

2. Slip 01010 Spacer onto rotor.

3. Place a .002" shim into front bearing plate as an initial spacing and slip 01007 Bearing into plate. Note: 01121 Shim Pack contains .001" and .002" shims.

4. Install bearing/bearing plate assembly onto rotor.

5. Tighten collet body onto rotor (torque to 17 N•m/150 in. - lbs.).

6. 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 1-5 with different shim if necessary.

7. Once proper rotor/gap clearance is achieved, install well lubricated 01185 Blades (4/pkg) into rotor slots. Dynabrade Air Lube P/N 95842 is recommended.

8. Install cylinder over rotor. Be sure air inlet holes of cylinder face away from bearing plate.

9. Press 02649 Rear Bearing into 01743 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.

11. Install motor assembly into housing. Be sure motor drops all the way into housing.

12. Apply a small amount of Loctite ®#567 sealant to threads and install 04034 Rear Exhaust Cover onto motor housing (torque 34 N•m/300 in. - lbs.).

13. Motor adjustment must now be checked. With motor housing still mounted in vise, pull end of rotor and twist (10-15 lbs. force), rotor should turn

freely without drag. If drag or rub is felt, then increase preload or remove shim. Also, push end of rotor and twist (10-15 lbs. force), rotor should turn freely

without drag. If drag or rub is felt, then deload or add shim.

Valve Body Assembly:

1. Insert 01469 Regulator with o-rings and valve stem in place into valve body. Secure with 95558 Retaining Ring.

2. Secure valve body in vise using 52296 Repair Collar with air inlet facing upwards. Insert 01464 Seal.

3. Line up hole in valve stem with hole in housing (looking past brass bushing). Insert 01472 Tip Valve so that the metal pin passes through the hole in the

valve stem. Install 01468 Spring (small end towards tip valve).

4. Assemble sintered muffler and felt muffler together and place in 94522 Muffler Cap. Install 94521 Muffler Base onto muffler cap.

5. Install 95438 O-Ring into groove on muffler base. Place 95375 O-Ring and 94526 Spacer into recessed area of muffler cap.

6. Slip 94523 Inlet Adapter through muffler assembly and install 95711 Retainer Ring into groove on inlet adapter.

7. Install air control ring into valve body housing.

8. Apply Loctite®#567 Sealant to threads of 94523 Inlet Adapter and install entire muffler assembly onto valve body (torque 23.0 N•m/200 in. - lbs.).

9. Replace air fitting. Secure inlet adapter with a wrench before tightening air fitting. Install throttle lever and 12132 Pin.

Notice: To adjust throttle body orientation for a rear exhaust tool.

1. Use 52296 Repair Collar to secure valve body in vise with 01739 Housing facing up.

2. Peel down 01558 Collar to expose the hex portion of 01461 Lock Nut.

(continued on next page.)

Optional Accessories

Wrenches

95262 – 14 mm open-end.95281 – 19 mm open-end.

Dynaswivel®

•Swivels 360° at two locations which

allows an air hose to drop straight to

the floor, no matter how the tool is held.

•94300 Composite 1/4" NPT

96045 Motor Tune-Up Kit:

•Includes assorted parts to help maintain

and repair motor.

Collet Inserts

•50065 – 1/8"

•50013 – 1/4"

•50016 – 6 mm

•50039 – 8 mm

52296 Repair Collar

•Specially designed collar for use in vise to

prevent damage to valve body housing

during disassembly/assembly.

Disassembly/Assembly Instructions-.7 Hp Rear Exhaust (continued)

3. Using a 34 mm crows foot and firmly holding motor housing, turn 01461 Lock Nut counter clockwise to loosen assembly.

4. Adjust orientation of the throttle lever to agree with your grip and comfort level allowing for additional rotation due to torquing.

5. Using the 34 mm crows foot and (torque 45 N•m/400 In. lb. while firmly holding motor housing in place to reduce housing rotation) to tighten

01461 Lock Nut.

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.

53032 1/4" Drill Chuck

•Includes: 53052 Mated Chuck Key

DYNABRADE