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 SHOVEL PARTS AND ACCESSORIES
(Continued)
Shovel Teeth
Hard-face shovel teeth when they are new, before
putting them in service. The weld bead pattern used on
shovel teeth can have a marked effect on service life.
Teeth working primarily in rock should be hard-faced
with beads running the length of the tooth to allow the
rock to ride on the hard metal beads. When working in
dirt, clay or sand, run the beads across the flow of
material (Figure 2-23) so it will fill cavities between
the weld beads and give the base metal added
protection. Another effective pattern is the waffle or
cross hatch (Figure 2-24). Apply hard-facing to the
top and sides of the tooth 2 in. up from point. Stringer
beads behind a solid deposit reduces wash (Figure
2-25). Where abrasion and impact are extreme, use
electrodes on pages 1-25, 1-22, or 1-20. In cases
where impact is moderate and abrasion severe, use
electrodes on pages 1-26, 1-25, or 1-22.
FIGURE 2-23. Hard-Facing Shovel Teeth
2-34
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