Dynabrade 50304, 50307 User Manual

Tool Intent: Disc Sanders are for material

emoval and finishing applications, using

r
properly speed-rated (RPM) coated and
engineered abrasives with 7/8" through-hole.

PD06.28R

July, 2018

upersedes PD06.28

S

4-1/2"– 5" Vertical

Models:

50304 – 8,500 RPM
50307 – 11,000 RPM

O

Oil: O1= Air Lube

Adhesive:

A

T

= Loctite #271

A

2

A

= Loctite #380

6

A

= Loctite #567

8

Torque: N•m x 8.85 = In. - lbs.

Index Key

No. Part # Description

1 01790 Screw (4)
2 01791 Washer (6)
3 07123 Governor Cover
4 07129 Gasket
5 07126 Governor Bushing
6 50471 Spring Holder
7 95611 Spacer (6/pkg.)
8 07159 Governor Spring - 8,500

07175 Governor Spring - 11,000

9 50470 Pin
10 50463 Governor Valve
11 50938 Governor Pin (2)
12 50399 Governor Weight (2) - 8,500

50460 Governor Weight (2) - 11,000
13 07124 Governor Cage
14 01007 Bearing
15 07114 Rear Bearing Plate
16 01775 Pin
17 07118 Cylinder
18 01673 Pin
19 07107 Blade (5/pkg)
20 07104 Rotor
21 07120 Front Bearing Plate
22 01277 Shim Pack (3/pkg.)
23 02552 Bearing
24 07158 Spacer
25 07135 Rotor Nut
26 07157 Handle Grip
27 52093 Rod
28 50511 Screw (2)
29 07149 Clamp
30 01797 Exhaust Cover
31 01798 Felt Silencer
32 96304 Gasket
33 07161 Housing
34 07136 Grip
35 02658 Packing
36 02631 Nut
37 02626 Adjustment Bushing
38 01746 O-Ring
39 01089 Safety Throttle Lever
40 07141 Valve Body

41 07142 Bushing
42 01697 Inlet Bushing
43 01017 Pin
44 07168 Valve Stem Assembly
45 07145 Spring
46 07146 Packing
47 07147 Plug

(Includes 07142 Bushing)

KEY

Disc Sander

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.

A

lways follow adhesive

manufacturers cleaning

and priming

r

ecommendations.

5

3

4

6

12

11

7

8

m

•

N

11

T

17

16

15

9 N•m

T

A

8

13

14

9

10

21

18

22

23

FT HAND THRE

LE

T

25

ADS

24

23 N•m

2

29

32

30

31

33

50 N•m

T

38

39

A

8

35

36

A

37

2

40

T

N•m

5

4

34

A

8

45

17 N•m

T

47

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

1

2

20

T

28

41

44

46

N•m

8

T

19

m

N•

8

45 N•m

T

O

1

42

A

43

A

6

O

1

27

26

2

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.

5. Air tools are not intended for use in explosive atmospheres and are not insulated for contact with electrical power sources. Sanding/Grinding certain

materials can create explosive dust. It is the employers responsibility to notify the user of acceptable dust levels. Sanding/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.

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 55 SCFM @ 100 PSIG has 1/2" NPT female ports.

5. Use only genuine Dynabrade replacement parts. To reorder replacement parts, specify the Model #, Serial #, and RPM of your machine.

6. A Motor Tune-Up Kit (P/N 96011) is available which includes assorted parts to help maintain motor and repair motor.

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.

Note: To reorder replacement parts, specify the Model #, Serial #, and RPM of your machine.

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.

Model Motor Motor Air Inlet Maximum Air Flow Air Pressure Spindle Weight Length Height

Number hp (W) RPM Thread CFM/SCFM (LPM) PSIG (Bars) Thread Pound (Kg) Inch (mm) Inch (mm)

50304 1.2 (895) 8,500 1/2" NPT 4/32 (906) 90 (6.2) 5/8"-11 male 4 (1.8) 8 (203) 6 (152)

50307 1.2 (895) 11,000 1/2" NPT 5/36 (1,020) 90 (6.2) 5/8"-11 male 4 (1.8) 8 (203) 6 (152)

Additional Specifications: Hose Size 1/2" (13 mm) • Visit Dynabrade.com for your model’s vibration and sound data.

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