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Item 58528 

        

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Grounding

TO PREVENT ELECTRIC SHOCK AND DEATH FROM 

INCORRECT GROUNDING WIRE CONNECTION: 

Check with a qualified electrician if you are in doubt as to whether the outlet is properly 

grounded.  Do not modify the power cord plug provided with the tool.  Never remove the 

grounding prong from the plug.  Do not use the tool if the power cord or plug is damaged.  If damaged, have 

it repaired by a service facility before use.  If the plug will not fit the outlet, have a proper outlet installed by 

a qualified electrician.

Double Insulated Tools: Tools with Two Prong Plugs

 

Outlets for 2-Prong Plug

1.  Tools marked “Double Insulated” do not 

require grounding.  They have a special 

double insulation system which satisfies 

OSHA requirements and complies with 

the applicable standards of Underwriters 

Laboratories, Inc., the Canadian Standard 

Association, and the National Electrical Code.

2.  Double insulated tools may be used in either of the 

120 volt outlets shown in the preceding illustration.

   

(See Outlets for 2-Prong Plug.)

Extension Cords

1. 

Grounded

 tools require a three wire extension cord.  

Double Insulated

 tools can use either 

a two or three wire extension cord.

2.  As the distance from the supply outlet increases, 

you must use a heavier gauge extension cord.  

Using extension cords with inadequately sized wire 

causes a serious drop in voltage, resulting in loss of 

power and possible tool damage.  

(See Table A.)

3.  The smaller the gauge number of the wire, the 

greater the capacity of the cord.  For example, 

a 14 gauge cord can carry a higher current 

than a 16 gauge cord.  

(See Table A.)

4.  When using more than one extension cord 

to make up the total length, make sure 

each cord contains at least the minimum 

wire size required.  

(See Table A.)

5.  If you are using one extension cord for more 

than one tool, add the nameplate

 

amperes 

and use the sum to determine the required 

minimum cord size.  

(See Table A.)

6.  If you are using an extension cord outdoors, make 

sure it is marked with the suffix “W-A” (“W” in 

Canada) to indicate it is acceptable for outdoor use.

7.  Make sure the extension cord is properly wired 

and in good electrical condition.  Always replace 

a damaged extension cord or have it repaired 

by a qualified electrician before using it.

8.  Protect the extension cords from sharp objects, 

excessive heat, and damp or wet areas.

TABLE A:  RECOMMENDED MINIMUM WIRE 

GAUGE FOR EXTENSION CORDS* (120/240 VOLT)

NAMEPLATE

AMPERES

(at full load)

EXTENSION CORD 

LENGTH

25´ 50´ 75´ 100´ 150´

0 – 2.0

18

18

18

18

16

2.1 – 3.4

18

18

18

16

14

3.5 – 5.0

18

18

16

14

12

5.1 – 7.0

18

16

14

12

12

7.1 – 12.0

18

14

12

10

-

12.1 – 16.0

14

12

10

-

-

16.1 – 20.0

12

10

-

-

-

* Based on limiting the line voltage drop to five volts at 

150% of the rated amperes.

Summary of Contents for 58528

Page 1: ...ence 21j When unpacking make sure that the product is intact and undamaged If any parts are missing or broken please call 1 888 866 5797 as soon as possible Copyright 2021 by Harbor Freight Tools All...

Page 2: ...ed with this power tool Failure to follow all instructions listed below may result in electric shock fire and or serious injury Save all warnings and instructions for future reference The term power t...

Page 3: ...azards h Do not let familiarity gained from frequent use of tools allow you to become complacent and ignore tool safety principles A careless action can cause severe injury within a fraction of a seco...

Page 4: ...e may make exposed metal parts of the power tool live and could give the operator an electric shock c Let bit cool before touching changing or adjusting it Bits heat up dramatically while in use and c...

Page 5: ...outlet increases you must use a heavier gauge extension cord Using extension cords with inadequately sized wire causes a serious drop in voltage resulting in loss of power and possible tool damage See...

Page 6: ...rking concerning Risk of Eye Injury Wear ANSI approved safety goggles with side shields Read the manual before set up and or use WARNING marking concerning Risk of Fire Do not cover ventilation ducts...

Page 7: ...ION section at the beginning of this manual including all text under subheadings therein before set up or use of this product Note For additional information regarding the parts listed in the followin...

Page 8: ...ne hand rotate the collar of the Chuck counterclockwise until the jaws of the drill are opened enough to fit the drill bit 2 Use a drill bit designed for the workpiece type Place the desired drill bit...

Page 9: ...l or thick pieces use cutting oil to keep the bit cool 6 Since drilling in metal is a slow operation you may lock the Trigger in the ON position to maintain a constant speed and reduce fatigue 7 When...

Page 10: ...or example 1 Check that cord is plugged in 2 Check power at outlet If outlet is unpowered turn off tool and check circuit breaker If breaker is tripped make sure circuit is right capacity for tool and...

Page 11: ...nder Ring 1 11 Brass Bushing 1 12 Bearing 1 13 Armature 1 14 Carbon Brush 2 15 Carbon Brush Holder 2 16 Bearing 1 17 Stator 1 Part Description Qty 18 Clip 1 19 Self Tapping Screw 4 x 14 2 20 Power Cor...

Page 12: ...Y 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 transpor...

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