Harbor Freight Tools Saw 47840 User Manual

PORTABLE BANDSAW  
Variable Speed  
47840  
ASSEMBLY And OPERATInG  
InSTRUCTIOnS  
This Portable Bandsaw goes where your regular Bandsaw won’t!  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Copyright © 2002 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 and replacement parts, please call 1-800-444-3353  
Cover Picture Revised 06/06  
 
9. do not overreach. Keep proper footing and balance at all times. Do not reach over or  
across running machines.  
10. Maintain tools with care. Keep tools sharp and clean for better and safer  
performance. Follow instructions for lubricating and changing accessories. Inspect tool  
cords periodically and, if damaged, have them repaired by an authorized technician.  
The handles must be kept clean, dry, and free from oil and grease at all times.  
11. disconnect power. Unplug tool when not in use.  
12. Remove adjusting keys and wrenches. Check that keys and adjusting wrenches  
are removed from the tool or machine work surface before plugging it in.  
13. Avoid unintentional starting. Be sure the switch is in the Off position when not  
in use and before plugging in. Do not carry any tool with your finger on the trigger,  
whether it is plugged in or not.  
14. Stay alert. Watch what you are doing, use common sense. Do not operate any tool  
when you are tired.  
15. Take caution as some woods contain preservatives such as copper chromium  
arsenate (CCA) which can be toxic. When cutting these materials extra care should  
be taken to avoid inhalation and minimize skin contact.  
16. Check for damaged parts. Before using any tool, any part that appears damaged  
should be carefully checked to determine that it will operate properly and perform its  
intended function. Check for alignment and binding of moving parts; any broken parts  
or mounting fixtures; and any other condition that may affect proper operation. Any  
part that is damaged should be properly repaired or replaced by a qualified technician.  
Do not use the tool if any switch does not turn On and Off properly.  
17. Guard against electric shock. Prevent body contact with grounded surfaces such as  
pipes, radiators, ranges, and refrigerator enclosures.  
18. Replacement parts and accessories. When servicing, use only identical  
replacement parts. Use of any other parts will void the warranty. Only use accessories  
intended for use with this tool. Approved accessories are available from Harbor Freight  
Tools.  
19. do not operate tool if under the influence of alcohol or drugs. Read warning  
labels on prescriptions to determine if your judgment or reflexes are impaired while  
taking drugs. If there is any doubt, do not operate the tool.  
20. Use proper size and type extension cord. If an extension cord is required, it must be  
of the proper size and type to supply the correct current to the tool without heating up.  
Otherwise, the extension cord could melt and catch fire, or cause electrical damage  
to the tool. This tool requires use of an extension cord of 0 to 10 amps capability (up  
to 50 feet), with wire size rated at 18 AWG. Longer extension cords require larger size  
wire. If you are using the tool outdoors, use an extension cord rated for outdoor use  
(signified by “WA” on the jacket).  
21. Maintenance. For your safety, maintenance should be performed regularly by a  
qualified technician.  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 3  
 
22. never leave the Bandsaw unattended while it is running. Do not put the Bandsaw  
down until the blade comes to a complete stop.  
23. Cutting Material. Make sure cutting material is securely fastened down before  
operating the Bandsaw. Work slowly and carefully when cutting corners, sharp edges,  
ragged welds, etc., to avoid snagging.  
Caution: Cutting material and the motor housing can get very hot during operation.  
Stop work until unit cools down to safe temperature.  
Spray on a coolant or water onto the blade.  
note:Performance of this tool (if powered by line voltage) may vary depending on varia-  
tions in local line voltage. Extension cord usage may also affect tool performance.  
Warning:The warnings, cautions, and instructions discussed in this instruction manual  
cannot cover all possible conditions and situations that may occur.It must be understood  
by the operator that common sense and caution are factors which cannot be built into  
this product, but must be supplied by the operator.  
Unpacking  
When unpacking, check to make sure all of the parts on the Parts List on Page 9 of this  
manual are included. If any parts are missing or broken, please call Harbor Freight Tools at  
the number on the cover of this manual as soon as possible.  
Assembly  
1. WARnInG! Always make sure that the  
unit is off and unplugged before as-  
sembly.  
46, 47,  
& 62  
2. The Guide Bar needs (63) to be assembled  
to the bandsaw for proper operation.  
3. Remove the Screws (62) on the Frame  
(21), along with their Spring and Flat  
Washers (47, 46).  
4. Install the Guide Bar around the blade  
as shown using the Screws (62), Spring  
Washers (47), and Flat Washers (46).  
63  
REV 06/06  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 4  
 
Operation  
Warning: Never use a blade which is not in accordance with the sizes approved for  
this Bandsaw. If you are unsure of the blade, do not use it and contact a Harbor Freight  
technician at the number on the cover of this manual.  
Select the proper blade according to the cutting material and the diameter of the workpiece.  
This bandsaw comes with a 14 teeth-per-inch blade which is suitable for most applications  
(see below).  
14 TPI - Soft/ Thick Material( aluminum, lead, rubber-like material, wood )  
Other applications for 24 teeth-per-inch blades (not included) are shown below:  
24 TPI - Hard/Thin Material ( cast iron, soft steel, hard steel )  
Switch Operation  
Warning: Before plugging in the Bandsaw make sure the trigger switch on the inside upper  
portion of the U-shaped handle returns to it’s original position after being depressed. Test it  
by depressing it with your index finger and letting go. It should spring back into position if it  
is in working order.  
1. When the trigger is pulled, the saw motor will switch on.  
2. When the trigger is released, the motor stops.  
3. Adjacent to the trigger is the lock button. This enables you to lock on the motor without  
continually depressing the trigger. To activate the lock switch, turn on the motor as ex-  
plained in Step 1. While continuing to depress the trigger, engage the lock button with  
your other hand. Release the trigger and the motor will stay locked on. To disengage the  
lock button, pull the trigger again.  
REV 03/04  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 5  
 
How to Cut  
1. Secure your work piece to a workbench or other solid surface.  
2. Make sure the cord is out of the way.  
3. Set the Guide Bar (63) against the work piece.  
4. Turn on the Bandsaw and allow it to come up to full speed before starting the cut.  
5. Tilt the unit so that the blade is vertical as shown in Figure B. Cut objects from the flattest  
side, where the most teeth of the bandsaw will contact the workpiece at the beginning of  
the cut.  
T
Work-  
piece  
Figure A  
6. When the motor turns on, the blade will begin turning in a counterclockwise direction and  
begin cutting.  
Figure B  
7. Do not apply force to the tool by exerting too much hand pressure or leaning into it. The  
weight of the tool itself creates enough force to make a clean cut. Be patient. Forcing or  
leaning on the tool may twist or break the blade, damaging the saw and possibly causing  
injury.  
8. As you reach the end of your workpiece, finish off the cut by slightly raising the unit slowly,  
bringing the blade up.  
REV 06/06  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 6  
 
How to Install a Saw Blade  
Warning: Make sure the trigger is unlocked and unplug the tool before installing and  
removing a saw blade.  
1. Thoroughly clean off the saw blade with a clean, dry cloth.  
2. Turn the Tension Handle (24) until it feels loose (loose position).  
3. As shown on Figure C, turn over the unit and begin to install the blade as shown in #1 on  
Figure C. Note: The blade teeth must be pointing downward.  
4. Set the blade onto one blade guide over one side of both Ring Gears (41c, 41d).  
5. Insert the other side of the blade onto the other blade guide until it reaches the bearing  
that supports the back of the blade.  
6. Hold the blade on the guides and push in as shown on numbers 2 & 3 of Figure C. Make  
sure the blade evenly fits around the wheels.  
7. Turn the Tension Handle (24) until the blade is taut and the handle “Tight”.  
8. Plug in the tool and put on your ear/eye protection, and turn on the tool. Inspect the blade  
and make sure it runs steady and evenly around the wheels, and that the teeth are pointed  
in the correct direction.  
Figure C  
Removing a Saw Blade  
1. Thoroughly clean off the saw blade with a clean, dry cloth.  
2. Turn the Tension Handle (24) until it feels loose (loose position).  
3. Turn the unit over and hold the blade on the guides and push in as shown on numbers 2  
& 3 of Figure C. Work the blade off of the wheels.  
REV 07/04  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 7  
 
Maintenance  
When servicing, use only identical replacement parts from Harbor Freight Tools.  
Failure to use identical replacement parts will void the warranty.  
1. Always keep the motor housing clear of any debris.  
2. Wipe the tool clean regularly with a clean cloth or dry brush. Never use solvents or harsh  
cleaners.  
3. Keep the saw blade clean by regularly removing any oil or debris.  
4. Inspect the power cord before each use. If any damage exists, have it replaced by a quali-  
fied technician.  
5. If you see any sign of saw blade slippage, make sure blade tension is correct.  
6. No motor lubrication is required. Under normal operating conditions, the bearings are  
sufficiently lubricated for the life of the machine.  
7. When not using the tool for long periods of time, remove the saw blade.  
Cleaning or replacing the Carbon Brushes (4).  
1. Unscrew the Brush Cap (5).  
2. Carefully slide out the Carbon Brushes (4). Do not force or bend the spring attached to  
the brushes.  
3. Examine the springs for dirt or wear.To remove dirt, lightly rub with a common pencil eraser.  
If the springs are very dirty, stretched, or worn at all, replace them with new ones.  
4. When replacing the Carbon Brushes (4), slide them back in slowly, being careful not to  
bend them or catch them on the side of the cylinder. Carefully screw on the Brush Cap  
(5).  
PLEASE REAd THE FOLLOWInG CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS DIAGRAM IN THIS  
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBUTOR  
MAKES ANY REPRESENTATION ORWARRANTY OF ANY KINDTOTHE BUYERTHAT 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 STATESTHAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD  
BE UNDERTAKEN BY CERTIFIED AND LICENSEDTECHNICIANS AND NOT BYTHE 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.  
nOTE: Some parts are listed and shown for illustration purposes only and are not available  
individually as replacement parts.  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 8  
 
Parts List  
Part  
1
description  
Allen Head Bolt M6 x 60  
Flat Washer Ø6  
Motor Housing  
Carbon Brush  
Brush Cap  
Qty.  
4
6
1
2
2
1
2
2
1
1
1
1
2
1
1
1
1
1
2
1
1
1
1
1
1
1
2
1
1
2
1
3
2
1
Part  
39  
description  
Pan Head Screw M5 x 20  
Pan Head Screw M5 x 15  
Qty.  
2
1
1
1
2
1
6
6
4
3
1
4
1
1
1
1
1
2
2
3
1
2
1
1
1
4
1
1
1
1
2
1
1
4
2
40  
3
41c Rubber Ring Gear, Drive  
41d Rubber Ring Gear, Motor  
4
5
42  
45  
46  
47  
48  
49  
50  
51  
52  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
65  
66  
67  
68  
69  
70  
72  
73  
74  
75  
77  
Screw  
6
Rubber Bearing Holder  
Ball Bearing 80018  
Pan Head Screw M5 x 50  
Field Assembly  
Baffle  
Right Blade Guide  
Flat Washer Ø5  
Spring Washer  
Phillips Screw M5 x 35  
Bearing 100698  
Pin Shaft  
7
8
9
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
31  
32  
34  
35  
36  
37  
38  
Armature  
Fan  
Screw  
Ball Bearing 80029  
Front Bracket  
Lower Handle Housing  
Switch  
Bushing  
Cord & Plug  
Gear 74  
Cord Guard  
Stop Ring Ø12  
Ball Bearing 80201  
Pin Ø4 x 6  
Fixing Plate  
Screw M4 x 18  
Screw M4 x 12  
Screw M4 x 25  
Upper Handle Housing  
Screw M5 x 30  
Guide Bar  
Gear Shaft 75  
Needle Bearing  
Gear Shaft 72  
Gear Shaft 73  
Tension Handle  
Flat Washer Ø20.5 x 0.5  
Grip Handle  
Blade 1140 x 13 x 0.5  
Cover  
Screw M4 x 10  
Square  
Allen Head Bolt M6 x 40  
Frame  
Hex Key 6mm  
Bushing  
Left Blade Guide  
Spring  
Cross Pan Head Screw  
Brush Holder  
Embedding Assembly  
Bushing  
Yoke  
Collar  
Flat Head Screw M5 x 15  
Spring Fitting Plate  
Bearing Assembly  
REV 01/04; 07/04; 08/04; 06/06; 07/06  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 9  
 
Assembly diagram  
REV 01/04; 07/04; 08/04; 06/06; 07/06  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 10  
 
LIMITED 90 DAY WARRANTY  
Harbor FreightTools 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 ninety 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, 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 06/06  
SKU 47840  
For technical questions, please call 1-800-444-3353.  
Page 11  
 

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