Makita 9924B User manual

Belt Sander
Belt speed
minute
Belt size
76 mm (3") MODEL 9924B
Continuous Power
(Input) cord
rating length 1 wFiyhf I
INSTRUCTION MANUAL
76 mm x 61 0 mm
(3") x (24")
DOUBLE
INSULATION
400 m 355mm 4.6kg 5m
(14") (10.1 Ibs) (16.4 Ibs)
850 W
(1,300 ft.)
Specifications

IMPORTANT
SAFETY INSTRUCTIONS
(For All Tools)
WARNING:
WHEN USINGELECTRICTOOLS, BASICSAFETY
PRECAUTIONSSHOULDALWAYS BE FOLLOWEDTO REDUCE
THE RISK OF FIRE, ELECTRIC SHOCK, AND PERSONAL
INJURY, INCLUDING THE FOLLOWING:
READ ALL INSTRUCTIONS.
1.
2.
3.
4.
5.
6.
7.
8.
9.
IO.
11.
12.
13.
2
KEEP WORK AREA CLEAN. Cluttered areas and benches invite injuries.
CONSIDER WORK AREA ENVIRONMENT. Don't use power tools in damp
or wet locations. Keep work area well
lit. Don't expose powertools torain.
Don't use tool in presence of flammable liquids or gases.
KEEP CHILDREN AWAY. All visitors should be kept away from work area.
Don't let visitors contact tool or extension cord.
STORE IDLETOOLS. Whennot inuse,
tools should be stored in dry, andhigh
or locked-up place
- out of reach of children.
DON'T FORCETOOL.
It willdo thejob better andsafer atthe ratefor which
it was intended.
USE RIGHT TOOL. Don't force small tool or attachment to do the job of a
heavy-duty tool. Don't use tool for purpose not intended.
DRESSPROPERLY. Don't wear looseclothingorjewelry. They canbe caught
in moving parts. Rubber gloves and non-skidfootwear are recommended
when working outdoors. Wear protective hair covering tocontain longhair.
USE SAFETY GLASSES. Also useface or dust mask
if cuttingoperation is
dusty.
DON'T ABUSE CORD. Never carry toolby cord or yank
it todisconnect from
receptacle. Keep cord from heat, oil, and sharp edges.
SECURE WORK. Use clamps or a vise to hold work. It's safer than using
your hand and
it frees both hands to operate tool.
DON'T OVERREACH. Keep proper footing and balance at all times.
MAINTAIN TOOLS WITH CARE. Keep tools sharp and clean for better and
safer performance. Follow instructions for lubricatingand changing acces-
sories. Inspect toolcords periodicallyand
if damaged, haverepairedby autho-
rized service facility. Inspect extension cords periodically and replace if
damaged. Keep handles dry, clean, and free from oil and grease.
DISCONNECTTOOLS. When notinuse, before servicing, and when chang-
ing accessories, such as blades, bits, cutters.

14. REMOVEADJUSTING KEYS AND WRENCHES. Form habit of checking to
see that keysand adjusting wrenches are removed fromtool before turning
it on.
15. AVOID UNINTENTIONALSTARTING. Don‘t carry plugged-intool withfinger
on switch. Be sure switch is OFF when plugging in.
16. OUTDOOR USEEXTENSIONCORDS. Whentool is used outdoors, useonly
extension cords intended for use outdoors and
so marked.
17. STAY ALERT. Watch what you are doing, use common sense. Don’t operate
tool when you are tired.
18. CHECK DAMAGEDPARTS. Before further use of the tool, a guard or other
part that is damaged should be carefully checked to determine that
it will
operate properly and performitsintended function. Check for alignment of
moving parts, binding of moving parts, breakage of parts, mounting, and
any other conditions that may affect its operation.
A guard or other part
that is damaged should be properly repaired or replaced by an authorized
service center unless otherwise indicated elsewhere in this instruction
manual. Havedefective switches replacedby authorizedservicecenter. Don’t
use tool
if switch does not turn it on and off.
19. GUARD AGAINST ELECTRIC SHOCK. Prevent body contact withgrounded
surfaces. For example; pipes, radiators, ranges, refrigerator enclosures.
20. REPLACEMENTPARTS. Whenservicing, useonly identicalreplacementparts.
21. POLARIZEDPLUGS. To reduce the risk of electric shock, this equipment has
a polarized plug (one blade is wider than the other). This plug will fit in a
polarized outlet only one way. If
the plug does not fit fully in the outlet,
reversethe plug.
If it still does notfit, contactaqualified electriciantoinstall
the proper outlet. Do not change the plug in any way.
VOLTAGE WARNING: Before connectingthe tooltoa power source (receptacle,
outlet, etc.) be sure the voltage supplied is the same as that specified on the
nameplateof the tool. A power source withvoltage greater than that specified
for the tool can result inSERIOUS INJURY to the user
- as well as damage to
the tool.
If in doubt, DO NOT PLUG IN THE TOOL. Using a power source with
voltage
less than the nameplate rating is harmful to the motor.
SAVE THESE INSTRUCTIONS.
3

How to use
0 Switch action
To start the tool, simply pull the trigger.
Release the trigger to stop.
For continuousoperation without having
to keep your finger on the trigger, just
pull the trigger and then push inthe lock
button with your thumb. To stop the
tool from lock position, just pull the
trigger again and release
it.
0 Mounting belt
With the tool unplugged and the lever
pulled out
all the way, slip the belt over
the rollers with the arrow direction on
the belt the same
as that of tool revolu-
tion (or belt life
is shortened).
0 Belt adjustment
Flip sander over on its back and use the
adjustment knob to obtain equal tension
of belt over the front and back rollers.
Then plug in sander and switch
it on,
using the adjustment knob to center the
belt
as it runs over the rollers.
Failureto adjust beltproperly over rollers
can result infrayed beltedges.
I Lock button I
4

0 Starting and stoppingsanding operations
The sander should not be incontactwith
the work surface when you switch the
tool on or off.
Failure to disengage the sander from the
surface when starting or stopping may
cause
a poor sanding finish and damage
the belt
as well.
0 Sandingsuggestions
Grip the sander firmly in front and back and move the tool back and forth without
applying any pressure. The mere weight of the tool accomplishes an even sanding job.
Pressing down will only reduce efficiency and wear out the belt faster. For longer belt
life, remove grease
etc. from surface before operations. At the end of each sanding
stroke, shift sander sideways approximatelyone-half the width of your belt. Keep the
sander
level, flush with the work, and sand each area for the same amount of time.
Maintenance
0 Carbon brushes
Replace carbon brushes when they wear
down to about
6 mm (1/4") or spark-
ing will occur. Both brushes should be
changed
at the same time.
I
c- -I
6mm(';"l
Optional accessories
CAUTION: The accessories specified in this manual are recommended for use with your Makita
Belt Sander. The use of any other accessory might be hazardous.
0 Carbon plate
0 Steel plate
Part No. 342526-9
CAUTION :
Part No. 423028-5
Install the steel plate so that THE
EDGE
OF THE STEEL PLATE
WILL NOT PROTRUDE
FROM
THE EDGE OF THE BASEPLATE
ON THE SIDE WITH THE BELT
I NSTA LL I NG LEVER.
IF THE PLATE IS ALLOWED TO
PROTRUDE, IT MAY CAUSE
IN-
JURY.
5

76"(3") BELT SANDER
Model 9924B
6

ITEM NO.
‘E: ,& DESCRIPTION NO. USED
MACHINE
11
21
31
41
51
82
91
10
11
12
13
15
16
17
18
19
20
21
22
23
24
25
26
27
28
291
30
31
32
63
72
1
1
1
2
1
1
2
1
1
1
1
1
1
1
1
1
1
4
1
1
1
P
H Screw M5x40 fWith Warhsrl
Belt cover
Poly V-Belt
5-304
V-Pulley 5-25L
Slews 6
P. H Screw M4x30 fWith Waherl
Carbon Brush
Brush Holder Cap
Motor Housing
[With Brush
Holder x 2 & S Screw M5x8 x 21
Cord Guard
COR0 ASSEMBLY
fArremblsd Cord. Plug
& Card Guard1
Strain Relief
P.
H. Screw M4x18 (With Washer1
Handle Cover
Switch
H. Bolt M5x45
FIELD ASSEMBLY
fWith Garter Spring
x 21
Baffle Plate
Rubber Pin 4
0811 Bearing 6200LLB
Insulation Washer
ARMATURE ASSEMBLY
IAIrembled Items 21
- 251
Fan BO
Ball Bearing 62WLLB
Rubbar Pin 4
Motor Cover
P. H. Screw M5x40 (WithWsher)
CupWaher
12
Tension Roller
CupWashsr 12
Tenrion Roller Shaft
MACHINE
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
51
5a
59
60
61
62
63
64
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
1
1
1
1
2
1
1
A.R.
1
1
6
1
2
2
1
1
1
DESCRIPTION
Tension Roller Arm
Compression Spring
11
Driving Roller
Support Pin
Ed@
Slider
Retaining Ring S-12
Frame
Nme
Plats
Rivet 0-5
Shw
Compresston Spring 16
F.Washer
16
Screw M6x25
P.
H. Screw M5x12 fWith Washer1
Needle Bearing 810
Helical Gear 10
Ball Bearing 6200LLB
Gear Cover
V-PuIIey 5-45
P. H. Screw M4x18 [With Wlahsrl
Rubber Pin 4
RetainingRing S-12
T Washer 12
Helical Gear 40
Key 4
C. H. Screw M5x18
Cup Waher 12
P.
H. Screw M4x10 fWith Washer1
P. H. Screw M4x10 fWith Washer)
Steel Plate
Cork Rubbar Plate
Base Plate

MAKITA LIMITEDONE YEAR WARRANTY
Warranty Policy
Every Makita tool is thoroughly inspected and tested before leavingthe factory. It is warranted to
be free of defects from workmanship and materials for the period of ONE YEAR from the date of
original purchase. Should any trouble develop during this one-yearperiod, retum the COMPLETE
tool, freight prepaid, toone of Makita’s Factory or Authorized ServiceCenters. If inspection
shows
the trouble is caused by defective workmanship or material, Makita will repair (or at our option,
replace) without charge.
This Warranty does not apply where:
repairs have been made or attempted by others:
repairs are required because of normal wear and tear:
The tool has,been abused, misused or improperly maintained;
alterationshave been made to the tool.
IN NO EVENT SHALL MAKITA BE LIABLE FOR ANY INDIRECT, INCIDENTAL OR CON-
SEQUENTIAL DAMAGES FROM THE SALE
OR USE OFTHE PRODUCT. THIS DISCLAIMER
APPLIESBOTH DURING AND AFTER THE TERM OFTHIS WARRANTY.
This Warranty gives you specific legal rights, and you may also have other rights which vary from
state to state. Some states do not allow the exclusion or limitation of incidental or consequential
damages, so the above limitation or exclusion may not apply to you. Some states do not allow
limitation on how long an implied warranty lasts,
so the abovelimitation may not apply toyou.
MAKITA DISCLAIMS LIABILITY FOR ANY IMPLIED WARRANTIES, INCLUDING IMPLIED
WARRANTIES OF “MERCHANTABILITY” AND “FITNESS FOR
A SPECIFIC PURPOSE,”
AFTER THE ONE-YEARTERM OFTHIS WARRANTY.
Makita Corporation
3-11 -8, Sumiyoshi-cho,
Anjo, Aichi 446 Japan
8830870067
PRINTED IN JAPAN
1992 - 8 - N