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Pneumatic Tools
Hand-Held Rotary Rock Drill/Jackhammer

Equipment Operator Basic - Beginning construction equipment operators manual
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Figure  14-13.—Pavement  breaker. Moil Point 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. Chisel Point 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 14-11 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. Asphalt  Cutter 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 asphalt  patchwork. Clay Spade The clay spade is used for loosening compacted clay or dressing foundation edges.







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