Figure 14-13.Pavement breaker.
The moil point is commonly used to break up
pavement, rock, asphalt, or concrete. The moil point is
a solid bar of case-hardened steel, pointed at one end,
with a shank and upset collar at the other. The advantage
of the moil point is its sharp point which allows it to first
make a small hole that then slowly deepens and widens
until the sides of the point are in full contact with the
rock. The effect is like a wedge splitting an object.
The chisel point is constructed like the moil point
except for its point (fig. 14- 14). This point makes the
Figure 14-14.Air hammer attachments.
chisel point the best to use for trimming corners and
splitting seamed rock. Also, when you run into hardpan
in trenching or at the bottom of a construction project,
you can use the chisel point to slice off rock to reach the
desired grade elevation.
The primary use of the asphalt cutter is to trim or
cut the edges of laid asphalt, so major excavation will
not harm the existing surface. One good example is
The clay spade is used for loosening compacted clay
or dressing foundation edges.