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YOUR
WELDER
and what H wil/ do . .
Your CRAFTSMAN Arc Welderisa sturdily constructedandthoroughlytestedmachineengineered to
give many years of efficient trouble-free service. It is listed by Underwriters' Laboratories,
incorporated,which meansthat it passes al! requirements of safety, fire hazardand temperaturerise
limits asspecified in their Standard for Transfer-TypeArc-Welding Equipment.
S reply rest the electrode :an the iwork, Maintaining consta_nt: arcilength::is _
effortless as the cOne_: d epth aOtomatiCaly pt+oydes the correct! spacin[i
between electr#de: a:ndlw0rkfor proper arc length andals0 p{ev _ht_, e ei_trede
freezinj
Drag the electrode at the appropriate speed f0r the Weld:desired_:
E
,ec/_'/_#
MUSe'
WAY
/Ji''LoEC_OOe
Special
coating
containing
powdered
iron forms
a shell around
wire
Core,
Core burns
back
from
outside coating
to keep
proper: go:p;
Easiest arc_welding
method
known.
HOW THE CRAFTSMAN ELECTRODE
SIMPLIFIES WELDING
Craftsman
Contact
Electrode is se/f-starting--p{usautomatic
restarting... The electrode starts on contact.
Craftsman Contact Electrode is self-cleaning...
Under normal
conditions the slagremoves itselfasthe weld cools.Spatter is almost
non-exiszent. Craftsman Contact Electrode has an exceptionally
good appearance...
With fine ripple, unusuafiyclean, smooth
appearance,and reduced slaginclusions.
Craftsman Contact Electrodedeposits more metal faster... Because
the powdered iron in the flux goesintothe weld.
W H AT
H A P P
N S
WHEN
YOU
WELD?
1
Bath edges of the metal
are heated by the arc,
until --
mare molten metal and
flux is added from the
rod, which-
2
_hey melt and flow to-
gether forming onepiece,
instantly -
4
fills the crater and covers
the top of the weld with
sing.
5
This process continues the entire length of the weld.
Arc Welding
is the process of fusing two or more pieces of
metal together to form one piece. It is accomplished
by
heating adjacent metal surfaces to the melting point with an
electric
arc, then adding
a sufficient
amount of molten
metat to provide reinforcement
and fill any vacant space
between the parts being ioined, as shown in the accompany-
ing itlustrations.
The arc is created when an electric current, regulated
by
a welding transformer,
flows across an air gap between an
electrode
and the work being welded.
The intense heat
generated
by the arc is ideally suited for welding,
as it
:can be directed to affect only the part of the metal to be
welded, uniform heat from the arc, is acquired by keeping
its length the same for a given rod size and current setting.
At the instant an arc is "struck",
a portion of the base
metal directly
beneath
it, is melted,
resulting in a small
pool of molten metal, some of which is forced out by the
blast of the arc a_d deposited along
the weld path. The
depth of the crater thus formed, is the distance the" weld
will extend into the base metal and is referred
to as the
penetration
of the weld.
Some of the electrode
(which consists of a metal rod sur-
rounded by a flux coating)
is melted simuhaneousty with
the base metal and is carried by the arc to the liquid pool
This added mete! combines with the base metal to form
the deposited we}.d.
During this operation
a part of the flux coating burns off
and forms a gaseous smoke screen that completely
en-
ve!ops the arc, protecting
the molten metal from harmful
effects of oxygen and nitrogen in the surrounding atmos-
phere. The remainder
of the flux
coating that
melts is
carried
to the molten pool where it mixes with th_ metal
to combine with various impurities. It then floats
to the
surfaces to form a coating Of slag which covers the de-
posited weld metc_{, protecting
it from the atmosphere and
retarding
its coollng.
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