Harbor Freight Tools 98871 - Manual (Page 20)

Page 20 For technical questions, please call 1-800-444-3353. SKU 98871
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A good way to test welding technique is
to examine a weld’s appearance after it has
cooled and the slag has been removed. Then,
better welding can be learned by adjusting your
weld technique to remedy any problems found.
cleaning the Weld
tO PREVEnt
SERIOUS InjURy:
continue to wear AnSI-approved
safety goggles and protective
wear when cleaning a weld.
Sparks or chips may fly when
cleaning.
1.
A weld from flux core wire will be covered
by slag, use the Chipping Hammer to
knock this off. Be careful not to damage
the weld or base material.
Then, use the Wire Brush to further clean
2.
the weld or use an angle grinder (sold
separately) to shape the weld.
StRIKE tESt
A test weld on a PIEcE OF ScRAP can be tested by
using the following procedure.
WEAR AnSI gOggLES dURIng thIS PROcEdURE.
WARnIng! this test WILL damage the weld
it is performed on. this test is OnLy
an indicator of weld technique and is
not intended to test working welds.
After two scraps have been welded 1.
together and the weld has cooled, clamp
one scrap in a sturdy vise.
Stay clear from underneath while you 2.
strike the opposite scrap with a heavy
hammer, preferably a dead-blow hammer.
3. A gOOd WELd will deform but not break,
as shown on top.
A POOR WELd will be brittle and snap at
the weld, as shown on bottom.
A typical Flux-core Wire (FcAW) Weld
before cleaning.
base metal
weld bead
slag
spatter
chipping
hammer
Wire Brush
clamp
ScRAP
workpiece
gOOd WELd
bends and is not brittle
dead-blow hammer
clamp
ScRAP
workpiece
POOR WELd
snaps or cracks
dead-blow hammer
WELdIng tIPS