Harbor Freight Tools Grinder 45725 User Manual

20 INCH DISC  
SANDER / GRINDER  
Model 45725  
ASSEMBLY and OPERATING  
INSTRUCTIONS  
®
3491 Mission Oaks Blvd., Camarillo, CA 93011  
Copyright © 2001 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  
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8. Use eye, ear and face protection. Always wear ANSI approved impact safety  
goggles. Wear a full face shield if you are producing metal filings or wood chips. Wear  
an ANSI approved dust mask or respirator when working around metal, wood, and  
chemical dusts and mists.  
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.  
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. Maintenance. For your safety, maintenance should be performed regularly by a  
qualified technician.  
Page 3  
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SKU 45725  
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Note: Performance of this tool (if powered by line voltage) may vary depending on  
variations 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 under-  
stood by the operator that common sense and caution are factors which cannot be  
built into this product, but must be supplied by the operator.  
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other  
construction activites, 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 cilica 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. )  
Note: This tool comes equipped with a 220 V power cord  
with no plug. Have a plug installed by a licensed electrician.  
This tool will only work on a 220 V outlet. If you need one  
installed, use a licensed electrician.  
Unpacking  
When unpacking, check to make sure parts listed on page 8 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.  
Warning! Operation of equipment in close proximity to a heart  
pacemaker could cause interference or failure of the pacemaker.  
Assembly  
1. Have a licensed electrician attach a 220 Volt plug to the power cord.  
2. Stick a PSA (Pressure Sensitive Adhesive) backed 20 inch sanding disc on the metal  
sanding / grinding disc.  
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Operation  
Note: Prior to operation, go through the following checklist:  
1. Make sure power is off before plugging in the Sander/ Grinder.  
2. Check Sander / Grinder for damaged parts.  
3. Make sure all clamps, locks, and bolts are tight.  
4. Remove any adjusting keys or wrenches.  
5. Make sure guards are in place and in proper working order.  
Warning! Make sure table is securely locked into place following adjustments. Table should  
be secured to a flat, level surface capable of supporting weight of the Sander/Grinder as well  
as workpiece material being used.  
6. Give Sander / Grinder a test run. If the tool vibrates irregularly or makes unfamiliar noises,  
turn it off, unplug it, and refer to an authorized service technician.  
Work Table Adjustment  
Figure 1  
On / Off Switch  
Neutral / Direction Switch  
Miter Slot  
Height Adjustment Wheel  
Work Table  
Degree Gauge  
Tilt Lock  
Height Lock  
Tilt Adjustment Wheel  
Note: There must be a 1/16” clearance between the Work Table and the face of the Sanding  
Disc. Refer to Figure 1 above.  
1. The angle of the of the work table adjusts between 0 - 30 degrees to the left (standing at rear  
adjustment), or 0 - 45 degrees to the right.  
2. Loosen the Tilt Lock lever and turn the Tilt Adjustment Wheel to the desired direction. Use  
the Degree Gauge to set precise angles. Tighten the Tilt Lock lever.  
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Operation (continued)  
Refer to Figure 1 on page 5.  
3. To adjust the height of the Work Table, loosen the Height Lock lever and turn the Height  
Adjustment Wheel to the desired height. Tighten the Height Lock lever.  
Note: Before operation, make sure you are working in the right direction of feed. The disc will  
travel in either direction. You must move your workpiece in the opposite direction of the disc.  
See Figure 2 below. Failure to feed the material in the proper direction will lead to serious  
personal injury or property damage.  
Figure 2  
Direction of Rotation (left)  
Direction of Feed  
(right)  
Caution: Keep fingers and hands well  
clear of the spinning disc and the  
clearance between the table and  
the spinning disc.  
Running the Sander / Grinder  
Note: Your Sander / Grinder has a vacuum port (2-1/2” O.D. with 2-3/16” Adapter) for dust  
collection.  
1. You should always use a miter gauge (not included) to move material through the  
Sander / Grinder. Miter gauges are available at Harbor Freight Tools. This tool uses a 3/4”  
miter gauge. Read the instructions that come with the miter gauge for miter settings and ad-  
justments. Always hold the workpiece firmly against the miter gauge and the Table; be aware  
of the potential for workpiece “kickback”.  
2. Plug in the Sander / Grinder.  
3. Make sure the Neutral / Direction Switch is in neutral to start. See Figure 1 on page 5  
4. Turn the On / Off Switch to On. See Figure 1 on page 5.  
5. Determine the direction you want the disc to spin, and flip the Neutral / Direction Switch in  
that direction.  
Warning! Make sure you feed material from the opposite direction. Failure to feed the  
material in the proper direction will lead to serious personal injury or property damage.  
See Figure 2 above.  
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Operation (continued)  
6. When you finish sanding or grinding, turn the Neutral / Direction Switch to neutral and wait  
until the wheel comes to a complete stop. Turn off the On / Off Switch. See Figure 1.  
7. If you wish to switch rotation direction without turning off the machine, turn the  
Neutral / Direction Switch to neutral and wait until the wheel comes to a complete stop, and  
then turn switch to the opposite direction.  
Maintenance  
Warning! Make sure your Sander / Grinder is unplugged before attempting any  
maintenance.  
1. Remove your vacuum hose (not included) from the vacuum port and clean out port.  
2. Clean the surface of the Sander / Grinder with a clean cloth or soft dry brush.  
3. Check all nuts and bolts for tightness. Tighten if necessary.  
4. Check sanding disk for tears or frays. Replace if necessary.  
5. Clean debris from 3/4” miter slot.  
Page 7  
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Parts List  
Part No. Description  
Qty. Part No. Description  
Qty. Part No. Description  
Qty.  
4
8
2
4
4
4
8
1
4
1
1
3
3
1
1
1
1
1
1
1
1
4
4
2
2
2
2
2
2
2
1
2
1
4
4
1
Base  
1
1
1
4
4
4
1
1
1
1
1
1
1
1
1
2
2
2
1
2
1
1
1
1
1
1
1
1
1
1
4
4
1
2
1
36  
37  
38  
39  
40  
41  
42  
43  
44  
45  
46  
47  
48  
49  
50  
51  
52  
53  
54  
55  
56  
57  
58  
59  
60  
61  
62  
63  
64  
65  
66  
67  
68  
69  
70  
Spring Pin  
Worm Gear  
Washer  
Fixed Washer  
Sheave Stand  
Lock Handle  
Knob  
Rack  
Rack Set Screw 2  
Solid Segment  
Table  
Screw  
Fixed Pin  
Table Adj.  
Table Screw  
Table Washer  
Pilot  
Pilot Screw  
Spring Pin  
Pilot  
1
1
1
1
1
1
1
1
71  
72  
73  
74  
75  
76  
77  
78  
79  
80  
81  
82  
83  
84  
85  
86  
87  
88  
89  
90  
91  
92  
93  
94  
95  
96  
97  
98  
99  
100  
101  
102  
103  
104  
105  
Set Screw  
Fixed Washer  
Motor Base  
Washer  
Fixed Nut  
Fixed Screw  
Steel Washer  
Motor  
2
Column  
3
4
Cover/Support  
Screw  
5
6
7
8
Spring Washer  
Set Washer  
Motor Mount  
Upper Spring Pin  
Stud Bolt  
9
Nut  
10  
11  
12  
13  
14  
15  
16  
17  
18  
19  
20  
21  
22  
23  
24  
25  
26  
27  
28  
29  
30  
31  
32  
33  
34  
35  
Fixed Nut  
Set Spring Washer  
Fixed Washer  
Spring Stud Bolt  
Stud Washer  
Bracket  
Spring  
Keeper  
Sheave  
Fixed Screw  
Fixed Washer  
Fixed Nut  
Pin  
1
1
1
1
1
1
1
1
4
1
1
1
Cord  
Equal Key  
Screw  
Fixed Washer  
Hub  
Disc  
Clamp Block  
Clamp Screw  
Sanding Cloth  
Disc Guard  
Left Arm Guard  
Right Arm Guard  
Guard Screw  
Guard Washer  
Guard Bracket  
Screw  
Gear Segment  
Scale Set Knob 1  
Screw  
Scale Plate  
Gear Segment  
Worm Tilt  
Spring Pin  
Shaft  
Screw  
Pointer  
Knob  
Scale Set  
Protractor  
Nail  
Set Screw  
Set Nut  
1
1
1
1
1
1
1
1
1
1
3
1
1
Fixed Nut  
Wire Rope  
Screw Bracket  
Handle  
Handle Wheel  
Set Screw  
Shaft Base  
Set Screw  
Steel Washer  
Shaft  
Washer  
Set Screw  
Set Washer  
Set Nut  
Adj. Screw  
Switch Plate  
Screw  
Switch Control  
Screw  
Steel Washer  
Washer  
Spring Pin  
PLEASE READTHE FOLLOWING CAREFULLY  
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDEDTHE PARTS DIAGRAM INTHIS  
MANUAL AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER NOR DISTRIBU-  
TOR MAKES ANY REPRESENTATION OR WARRANTY 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 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.  
NOTE: Some parts are listed and shown for illustration purposes only and are not available  
individually as replacement parts.  
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Assembly Drawing  
Page 9  
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