Harbor Freight Tools Cordless Sander 47404 User Manual

10” DISC SANDER – BENCH TYPE  
Model 47404  
SET uP AND OPERATINg INSTRuCTIONS  
Diagrams within this manual may not be drawn proportionally.  
Due to continuing improvements, actual product may differ slightly from the product described herein.  
Distributed Exclusively by Harbor Freight Tools®.  
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Read this material before using this product.  
Failure to do so can result in serious injury.  
SAVE THIS MANuAl.  
Copyright© 2007 by Harbor Freight Tools®. All rights reserved. No portion of this  
manual or any artwork contained herein may be reproduced in any shape or form  
without the express written consent of Harbor Freight Tools.  
For technical questions or replacement parts, please call 1-800-444-3353.  
 
caught in moving parts. Wear a protective hair covering to prevent long hair from  
becoming caught in moving parts. If wearing a long-sleeve shirt, roll sleeves up  
above elbows.  
7.  
DO NOT OVERREACH. Keep proper footing and balance at all times to prevent  
tripping, falling, back injury, etcetera.  
8.  
9.  
INDuSTRIAl APPlICATIONS MuST FOllOW OSHA REQuIREMENT.  
STAY AlERT. Watch what you are doing at all times. Use common sense. Do  
not use this product when you are tired or distracted from the job at hand.  
10.  
11.  
CHECK FOR DAMAgED PARTS. Before using this product, carefully check that  
it will operate properly and perform its intended function. Check for damaged  
parts and any other conditions that may affect the operation of this product.  
Replace or repair damaged or worn parts immediately.  
REPlACEMENT PARTS AND ACCESSORIES: When servicing, use only  
identical replacement parts. Only use accessories intended for use with this  
product. Approved accessories are available from Harbor Freight Tools.  
12.  
13.  
14.  
MAINTAIN THIS PRODuCT WITH CARE. Keep this product clean, dry, and  
keep all cutting bits sharp for better and safer performance.  
MAINTENANCE: For your safety, service and maintenance should be performed  
regularly by a qualified technician.  
uSE THE RIgHT TOOl FOR THE JOB. Do not attempt to force a small tool or  
attachment to do the work of a larger industrial tool. There are certain  
applications for which this tool was designed. It will do the job better and more  
safely at the rate for which it was intended. Do not modify this tool, and do not  
use this tool for a purpose for which it was not intended.  
15.  
WARNINg: The warnings, precautions, and instructions discussed in this manual  
cannot cover all possible conditions and situations that may occur. The operator  
must understand that common sense and caution are factors, which cannot be  
built into this product, but must be supplied by the operator.  
SPECIFIC PRODuCT WARNINgS AND PRECAuTIONS  
1.  
MAINTAIN A SAFE WORKINg ENVIRONMENT. Keep the work area well lit.  
Make sure there is adequate surrounding workspace. Always keep the work  
area free of obstructions, grease, oil, trash, and other debris. Do not use the  
Disc Sander in areas near flammable chemicals, dusts, and vapors. Do not use  
the Disc Sander in a damp or wet location.  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 3  
 
2.  
3.  
gROuND THIS PRODuCT. The electrical Power Cord/Plug (part #34) for this  
product is equipped with a grounded, 3-prong Plug. Never remove the grounding  
prong or modify the Plug in any way. Do not use adapter plugs with this product.  
To comply with the National Electric Code, and to provide additional protection  
from the risk of electrical shock, this product should only be connected to a 120  
Volt, 3-hole electrical outlet that is protected by a Ground Fault Circuit Interrupter  
(GFCI). (See Assy. Diagram.)  
IF AN EXTENSION CORD (not provided) IS uSED, MAKE SuRE TO uSE  
ONlY ul APPROVED CORDS HAVINg THE CORRECT gAugE AND  
lENgTH. (See Figure A.)  
AWg RATINg CHART - 120 VOlT  
FIguRE A  
4.  
5.  
PROPERlY AlIgN THE WORK TABlE (part #7). Make sure the distance  
between the Work Table and Sanding Disc (part #14) does not exceed 1/16”.  
REDuCE THE RISK OF ACCIDENTAl STARTINg. Make sure the Safety Switch  
(part #32) is in the “OFF” position before plugging the Power Cord/Plug (part #34)  
into a grounded, 3-hole, 120 Volt, electrical outlet.  
(See Figure B, and Assy. Diagram.)  
6.  
PRIOR TO STARTINg THE DISC SANDER, MAKE SuRE All ADJuSTINg  
KEYS AND WRENCHES ARE REMOVED FROM THE TOOl.  
7.  
AlWAYS FEED THE WORKPIECE INTO AND AgAINST THE DIRECTION OF  
THE ROTATINg SANDINg DISC (part #14).  
8.  
NEVER STAND OR HAVE AN OBSERVER STAND IN lINE WITH THE  
SPINNINg SANDINg DISC (part #14).  
9.  
uSE THE PROPER SIZE AND TYPE OF SANDINg DISC (10”, PRESSuRE  
SENSITIVE ADHESIVE).  
10.  
11.  
HOlD THE WORKPIECE FIRMlY SO THAT IT WIll NOT BE PullED FROM  
YOuR HANDS DuRINg THE SANDINg PROCESS.  
FEED THE MATERIAl gRADuAllY. Do not force the machine to remove  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 4  
 
material faster than it was designed to sand.  
12.  
DO NOT ATTEMPT TO SAND WORKPIECES TOO SMAll TO SAFElY HOlD  
BY HAND. Attempting to hold onto a very small workpiece will bring fingers and  
hands in dangerous proximity to the spinning sanding disc.  
13.  
14.  
15.  
WHEN SANDINg A lARgE WORKPIECE, MAKE SuRE IT IS PROPERlY  
SuPPORTED AT THE WORK TABlE (part #7) HEIgHT.  
NEVER lEAVE THE DISC SANDER uNATTENDED WHEN IT IS RuNNINg.  
Turn off the machine, and wait until it has completely stopped before leaving.  
AlWAYS uNPlug THE DISC SANDER FROM ITS ElECTRICAl SuPPlY  
SOuRCE BEFORE PERFORMINg ANY INSPECTION, MAINTENANCE, OR  
ClEANINg PROCEDuRES.  
16.  
WARNINg: Some dust created by power sanding, sawing, grinding, drilling, and  
other construction activities, contain chemicals known (to the State of California)  
to cause cancer, birth defects or other reproductive harm. Some examples of  
these chemicals are: lead from lead-based paints, crystalline silica from bricks  
and cement or other masonry products, arsenic and chromium from chemically  
treated lumber. Your risk from these exposures varies, depending on how often  
you do this type of work. To reduce your exposure to these chemicals: work in  
a well ventilated area, and work with approved safety equipment, such as those  
dust masks that are specially designed to filter out microscopic particles.  
(California Health & Safety Code 25249.5, et seq.)  
18.  
WARNINg: People with pacemakers should consult their physician(s) before  
using this product. Operation of electrical equipment in close proximity to a heart  
pacemaker could cause interference or failure of the pacemaker.  
uNPACKINg  
When unpacking, check to make sure all the parts shown on the Parts list on page 11  
are included. If any parts are missing or broken, please call Harbor Freight Tools at the  
number shown on the cover of this manual as soon as possible.  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
ASSEMBlY INSTRuCTIONS  
NOTE: For additional references to the parts listed below, refer to the Assembly  
Diagram on page 12.  
To Assemble The Disc Sander:  
1.  
CAuTION: Prior to performing this procedure, make sure the Safety Switch (part  
#32) of the Disc Sander is in its “OFF” position and the Power Cord/Plug (part  
#34) is unplugged from its electrical outlet.  
(See Figures C, D, and Assy. Diagram.)  
2.  
3.  
Assembly of the Disc Sander requires the attachment of one Knob Bolt (part #11)  
on the front end and back end of the Work Table (part #7).  
(See Figure B, and Assy. Diagram.)  
Insert one Knob Bolt (part #11) onto each of the two Table Lock Assemblies (part  
#10). Insert one Spring (part #12) into each of the two Knob Bolts. Then, screw  
one Spring Adjusting Screw (part #13) into each of the two Knob Bolts to secure  
the Knob Bolts in place. (See Figure B, and Assy. Diagram.)  
10” PRESSURE SENSITIVE  
ADHESIVE SANDING DISC (#14)  
ROTATION DIRECTION  
KNOB (#1)  
DISC (#15)  
MITER GAUGE (#3)  
WORKPIECE  
WORK TABLE (#7)  
KNOB BOLT (#11)  
SPRING (#12)  
KNOB BOLT (#11)  
SPRING (#12)  
SPRING ADJUSTING  
SCREW (#13)  
SPRING ADJUSTING  
SCREW (#13)  
DUST COVER (#18)  
BASE (#23)  
ALWAYS FEED WORKPIECE INTO AND AGAINST  
THE ROTATION DIRECTION OF THE SANDING DISC.  
FIguRE B  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 6  
 
MACHINE ADJuSTMENT INSTRuCTIONS  
NOTE: For additional references to the parts listed below, refer to the Assembly  
Diagram on page 12.  
To Adjust The Table Angle:  
1.  
2.  
CAuTION: Prior to performing this procedure, make sure the Safety Switch (part  
#32) of the Disc Sander is in its “OFF” position and the Power Cord/Plug (part  
#34) is unplugged from its electrical outlet.  
(See Figures C, D, and Assy. Diagram.)  
The Work Table (part #7) may be angled downward from 0 to 45 degrees. To  
do so, slightly loosen the two Knob Bolts (part #11). Move the Work Table  
downward until the Angle Scale indicates the desired angle. Then, firmly  
retighten the two Knob Bolts. (See Figures B, C, and Assy. Diagram.)  
FRONT VIEW  
SAFETY SWITCH (#32)  
SAFETY SWITCH (#32)  
DISC (#15)  
WORK TABLE (#7)  
DISC (#15)  
ANGLE SCALE  
KNOB BOLT (#11)  
KNOB BOLT (#11)  
ANGLE SCALE  
WORK TABLE (#7)  
FIguRE C  
To Adjust The Miter Angle:  
1.  
CAuTION: Prior to performing this procedure, make sure the Safety Switch (part  
#32) of the Disc Sander is in its “OFF” position and the Power Cord/Plug (part  
#34) is unplugged from its electrical outlet.  
(See Figures C, D, and Assy. Diagram.)  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 7  
 
2.  
The Miter Gauge (part #3) may be angled from 0 to 60 degrees, right or left. To  
do so, slightly loosen the Knob (part #1). Move the Miter Gauge horizontally to  
the right or left until the Pointer (part #5) indicates the desired angle. Then, firmly  
retighten the Knob Bolt. (See Figures B, D, and Assy. Diagram.)  
FRONT VIEW  
MITER GAUGE (#3)  
MITER GAUGE (#3)  
KNOB (#1)  
KNOB  
(#1)  
SAFETY SWITCH  
(#32)  
SAFETY SWITCH  
(#32)  
POINTER (#5)  
POINTER (#5)  
FIguRE D  
To Attach A Sanding Disc To The Disc Sander:  
1.  
CAuTION: Prior to performing this procedure, make sure the Safety Switch (part  
#32) of the Disc Sander is in its “OFF” position and the Power Cord/Plug (part  
#34) is unplugged from its electrical outlet.  
(See Figures C, D, and Assy. Diagram.)  
2.  
3.  
The Disc Sander requires the use of a 10”, Pressure Sensitive Adhesive,  
Sanding Disc (part #14). Additional replacement Sanding Discs are available  
from Harbor Freight Tools. (See Figure B, and Assy. Diagram.)  
To attach the Sanding Disc (part #14) to the Disc (part #15) of the Disc Sander,  
peel off the protective backing of the Sanding Disc and firmly and evenly stick the  
Sanding Disc onto the Disc. (See Figure B, and Assy. Diagram.)  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 8  
 
OPERATINg INSTRuCTIONS  
NOTE: For additional references to the parts listed below, refer to the Assembly  
Diagram on page 12.  
1.  
CAuTION: Prior to beginning to use, make sure the Safety Switch (part #32) is  
in its “OFF” position and the Power Cord/Plug (part #34) is unplugged from its  
electrical outlet. (See Figures C, D, and Assy. Diagram.)  
2.  
Make all necessary adjustments to the Disc Sander as previously discussed.  
Make sure the distance between the Work Table (part #7) and Sanding Disc and  
Sanding Disc (part #14) does not exceed 1/16”.  
3.  
Plug the Power Cord/Plug (part #34) into the nearest 120 volt, grounded, 3-  
prong, electrical outlet. (See Figure B, and Assy. Diagram.)  
4.  
Turn the Safety Switch (part #32) to its “ON” position, and allow sufficient time  
for the Sanding Disc (part #14) to spin at full speed for 2 to 3 minutes. Check for  
proper sanding disc alignment. (See Figure B, and Assy. Diagram.)  
5.  
With both hands, slowly and carefully place the workpiece on the Work Table  
(part #7) and against the flat edge of the Miter Gauge (part #3), taking care not to  
allow the workpiece to immediately touch the spinning Sanding Disc (part #14).  
(See Figure B, and Assy. Diagram.)  
6.  
With both hands, firmly hold the workpiece down on the Work Table (part #7) and  
against the Miter Gauge (part #3). While holding the workpiece with one hand,  
use the other hand to grasp the Miter Gauge and slowly push the workpiece into  
the spinning Sanding Disc. CAuTION: AlWAYS KEEP HANDS AND FINgERS  
AWAY FROM THE SANDINg DISC. (See Figures B, D, and Assy. Diagram.)  
7.  
8.  
NOTE: Make sure to feed the workpiece gradually into the spinning Sanding  
Disc. Do not force the machine to remove material faster than it was designed  
to sand. If necessary, use the Miter Gauge (part #3) to back the workpiece away  
from the spinning Sanding Disc (part #14) and repeat Step #6 until the desired  
amount of material has been sanded off the workpiece.  
(See Figures B, D, and Assy. Diagram.)  
Once the sanding job is completed, back the workpiece slightly away from the  
spinning Sanding Disc (part #14). Keep a firm grip on the workpiece with one  
hand, and with the other hand turn the Safety Switch (part #32) to its “OFF”  
position. Wait until the Sanding Disc has completely stopped spinning. Then,  
remove the workpiece from the machine and unplug the Power Cord/Plug (part  
#34) from its electrical outlet. (See Figures B, C, D, and Assy. Diagram.)  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 9  
 
INSPECTION, MAINTENANCE, AND ClEANINg  
NOTE: For additional references to the parts listed below, refer to the Assembly  
Diagram on page 12.  
1.  
CAuTION: Always turn the Safety Switch (part #32) to its “OFF” position, unplug  
the Power Cord/Plug (part #34) from its electrical outlet, and wait until the  
Sanding Disc (part #14) has completely stopped spinning before performing any  
inspection, maintenance, or cleaning.  
2.  
BEFORE EACH uSE, inspect the general condition of the Disc Sander. Check  
for loose screws, misalignment or binding of moving parts, cracked or broken  
parts, damaged electrical wiring, and any other condition that may affect its safe  
operation. If abnormal noise or vibration occurs, have the problem corrected  
before further use. Do not use damaged equipment.  
3.  
DAIlY: Sanding Discs (part #14) must be sharp and clean to perform properly.  
Depending on materials sanded and frequency of machine use, Sanding Discs  
become clogged with wood, metal particles, and become dull. Dull Sanding  
Discs rub the workpiece rather than cut, which results in increased friction, higher  
temperatures, and a burned workpiece. As often as possible, check the condition  
of the Sanding Disc and, if necessary, replace a worn Sanding Disc with a new,  
10” Pressure Sensitive Adhesive disc. (See To Attach A Sanding Disc To The  
Disc Sander” section in this manual for further information.)  
4.  
DAIlY: With a soft brush, cloth, or vacuum, remove all debris from the Disc  
Sander. Then, use a premium quality, lightweight machine oil to lubricate all  
moving parts.  
PlEASE READ THE FOllOWINg CAREFullY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY  
DIAGRAM IN THIS MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR  
DISTRIBUTOR MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT  
HE OR SHE IS QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS  
QUALIFIED TO REPLACE ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR  
DISTRIBUTOR EXPRESSLY STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE  
UNDERTAKEN BY CERTIFIEDAND LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER  
ASSUMES ALL RISK AND LIABILITY ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL  
PRODUCT OR REPLACEMENT PARTS THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION  
OF REPLACEMENT PARTS THERETO.  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 10  
 
PARTS lIST  
Part  
1
Description  
Qty.  
1
Part  
Description  
Qty.  
1
Knob  
28* Rubber Ring  
29* Terminal Box  
30* Screw (ST3.5 x 14)  
31* Switch Plate  
32* Safety Switch  
33* Swivel Clamp  
34* Cord/Plug  
2
Screw (M5 x 6)  
Miter Gauge  
Washer  
1
1
3
1
4
4
19  
1
1
5
Pointer  
1
6
Gauge Sliding Bar  
Work Table  
1
1
7
1
1
8
Round Body Threaded Rod  
Washer  
2
35* Capacitor Clip  
36* Capacitor (6uF/8uF)  
37** Wavy Washer  
38** Stator  
1
9
2
1
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
Table Lock Assembly  
Knob Bolt  
2
1
2
1
Spring  
2
39** Bearing (6004)  
40** Key (C5 x 12)  
41** Rotor  
1
Spring Adjusting Screw  
Sanding Disc  
Disc  
2
1
1
1
1
42** Screw (M4 x 35)  
43** Bearing (6203)  
44** Washer  
1
Washer  
1
1
Screw (M6 x 12)  
Dust Cover  
1
4
1
45** Nut (M4)  
1
Screw (M5 x 8)  
Spring Washer  
Big Pointer  
7
46** End Bell  
1
7
47** Plastic Washer  
48** Nut (M5)  
3
1
4
Screw (M5 x 16)  
Base  
4
49** Fan  
1
1
50** Fan Cover  
1
Screw (M5 x 12)  
Rubber Pad  
Screw (M5 x 20)  
Motor Housing  
4
51** Spring Washer  
52** Screw (M4 x 16)  
53* Switch Assembly  
54** Motor Assembly  
3
4
3
1
1
1
1
* Available only as a complete Switch Assembly (see Part #53).  
** Available only as a complete Motor Assembly (see Part #54).  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 11  
 
NOTE: Some parts are listed and shown for illustration purposes only, and are not  
available individually as replacement parts.  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 12  
 
lIMITED 90 DAY WARRANTY  
Harbor Freight Tools Co. makes every effort to assure that its products meet high  
quality and durability standards, and warrants to the original purchaser that this product  
is free from defects in materials and workmanship for the period of 90 days from the date  
of purchase. This warranty does not apply to damage due directly or indirectly, to misuse,  
abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity,  
improper installation, normal wear and tear, or to lack of maintenance. We shall in no event  
be liable for death, injuries to persons or property, or for incidental, contingent, special  
or consequential damages arising from the use of our product. Some states do not allow  
the exclusion or limitation of incidental or consequential damages, so the above limitation  
of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL  
OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF  
MERCHANTABILITY AND FITNESS.  
To take advantage of this warranty, the product or part must be returned to us with  
transportation charges prepaid. Proof of purchase date and an explanation of the complaint  
must accompany the merchandise. If our inspection verifies the defect, we will either  
repair or replace the product at our election or we may elect to refund the purchase price  
if we cannot readily and quickly provide you with a replacement. We will return repaired  
products at our expense, but if we determine there is no defect, or that the defect resulted  
from causes not within the scope of our warranty, then you must bear the cost of returning  
the product.  
This warranty gives you specific legal rights and you may also have other rights  
which vary from state to state.  
3491 Mission Oaks Blvd. • PO Box 6009 • Camarillo, CA 93011 • (800) 444-3353  
REV 07j  
SKU 47404  
For technical questions, please call 1-800-444-3353.  
Page 13  
 

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