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Grounded  tools  require  a  three  wire  extension  cord.  Double  insulated

tools can use either a two or three wire extension cord. As the distance

from the supply outlet increases, you must use a heavier gauge exten-

sion cord. Using extension cords with inadequately sized wire causes a

serious  drop  in  voltage,  resulting  in  loss  of  power  and  possible  tool

damage. Refer to the table shown to determine the required minimum

wire  size.
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. When using more than one extension cord to make up the

total length, be sure each cord contains at least the minimum wire size

required. If you are using one extension cord for more than one tool, add

the nameplate amperes and use the sum to determine the required mini-

mum wire size.

Guidelines  for  Using  Extension  Cords

•

If  you  are  using  an  extension  cord  outdoors,  be  sure  it  is  marked

with the suffix “W-A” (“W” in Canada) to indicate that it is acceptable

for  outdoor  use.

•

Be sure your extension cord is properly wired and in good electrical

condition. Always  replace  a  damaged  extension  cord  or  have  it

repaired by a qualified person before using it.

•

Protect  your  extension  cords  from  sharp  objects,  excessive  heat

and damp  or  wet  areas.

GROUNDING

EXTENSION CORDS

Grounded  Tools:

Tools  with  Three  Prong  Plugs

Tools  marked  “Grounding  Required”

have  a  three  wire  cord  and  three

prong grounding plug. The plug must

be connected to a properly grounded

outlet (See Figure A). If the tool should

electrically  malfunction  or  break

down,  grounding  provides  a  low  re-

sistance  path  to  carry  electricity

away from the user, reducing the risk

of  electric  shock.

Improperly  connecting  the  grounding  wire  can  result  in  the

risk of electric shock. Check with a qualified electrician if you

are  in  doubt  as  to  whether  the  outlet  is  properly  grounded.

Do  not  modify  the  plug  provided  with  the  tool.  Never  remove

the grounding prong from the plug. Do not use the tool if the

cord  or  plug  is  damaged.  If  damaged,  have  it  repaired  by  a

MILWAUKEE

 service facility before use. If the plug will not fit

the  outlet,  have  a  proper  outlet  installed  by  a  qualified

electrician.

Nameplate

Amperes

0 - 5

5.1 - 8

8.1 - 12

12.1 - 15

15.1 - 20

Extension Cord Length

25'

16

16

14

12

10

75'

16

14

12

10

10

100'

14

12

10

10

--

150'

12

10

--

--

--

200'

12

--

--

--

--

Recommended  Minimum  Wire  Gauge

for  Extension  Cords*

* Based on limiting the line voltage drop to five

volts at 150% of the rated amperes.

50'

16

16

14

12

10

READ AND SAVE ALL INSTRUCTIONS

FOR FUTURE USE.

The  grounding  prong  in  the  plug  is  connected  through  the  green  wire

inside the cord to the grounding system in the tool. The green wire in the

cord must be the only wire connected to the tool's grounding system and

must never be attached to an electrically “live” terminal.
Your tool must be plugged into an appropriate outlet, properly installed

and  grounded  in  accordance  with  all  codes  and  ordinances.  The  plug

and outlet should look like those in Figure A.

Double  Insulated  Tools:

Tools  with  Two  Prong  Plugs

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  Labora-

tories,  Inc.,  the  Canadian  Standard

Association and the National Electri-

cal Code. Double Insulated tools may

be used in either of the 120 volt out-

lets shown in Figures B and C.

WARNING!

Fig. A

Fig. B

Fig. C

All manuals and user guides at all-guides.com

Summary of Contents for 4270-20

Page 1: ...REDUCE THE RISK OF INJURY USER MUST READ AND UNDERSTAND OPERATOR S MANUAL AFIN DE R DUIRE LE RISQUE DE BLESSURES L UTILISATEUR DOIT LIRE ET BIEN COMPRENDRE LE MANUEL DE L UTILISATEUR PARA REDUCIR EL...

Page 2: ...wer tool repaired before use Many accidents are caused by poorly maintained power tools 21 Keep cutting tools sharp and clean Properly maintained cutting tools with sharp cutting edges are less likely...

Page 3: ...ontact with a live wire will make exposed metal parts of the tool live and shock the operator 8 WARNING Some dust created by power sanding sawing grinding drilling and other construction activities co...

Page 4: ...ine Lockout The line lockout prevents the drill motor from starting when line power is first applied to the system or after a momentary power loss To reset tool turn magnet switch to OFF position and...

Page 5: ...lectricity away from the user reducing the risk of electric shock Improperly connecting the grounding wire can result in the risk of electric shock Check with a qualified electrician if you are in dou...

Page 6: ...sing accordingly with the 3 32 hex key provided Tightening the set screws increases friction on the slide The gib should be set tight enough to support the weight of the drill in any position All adju...

Page 7: ...Periodically inspect the cutter tips for loose or damaged tips 3 Plug in tool to power source 5 Position the tool so the center pin is directly over the desired cutting location Push the magnet switch...

Page 8: ...try to remove chips while the cutter is rotating Chips are sharp and can pull objects into moving parts see Fig 9 WARNING 8 Start the drill motor by pulling the drill on off switch to the ON position...

Page 9: ...l system Contact a MILWAUKEE service facility for ALL repairs WARNING To reduce the risk of injury electric shock and damage to the tool never immerse your tool in liquid or allow a liquid to flow ins...

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