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PowerPoint ® Presentation Unit 14 Portable Power Saws Power Tool Safety Circular Saws Reciprocating Saws Jigsaws Cutout Saws Chain Saws

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Text of PowerPoint ® Presentation Unit 14 Portable Power Saws Power Tool Safety Circular Saws...

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Slide 2 PowerPoint Presentation Unit 14 Portable Power Saws Power Tool Safety Circular Saws Reciprocating Saws Jigsaws Cutout Saws Chain Saws Slide 3 Unit 14 Portable Power Saws A portable GFCI compares the amount of current in the hot or ungrounded conductor with the amount of current in the common or grounded conductor and immediately breaks the circuit if a difference greater than 5 mA exists. Slide 4 Unit 14 Portable Power Saws Various configurations of approved grounded outlets are available for construction power tools and equipment. Slide 5 Unit 14 Portable Power Saws In a typical grounding system, a ground wire runs from the power tool (in this case, a circular saw) to the grounded plug. Another ground wire runs from the grounded receptacle to a grounding bar in the service panel. A copper ground wire extends from the service panel to a ground rod or other grounding means in the earth. Slide 6 Unit 14 Portable Power Saws Side-drive and worm- drive circular saws are frequently used in construction work. Slide 7 Unit 14 Portable Power Saws Blade diameter affects the maximum depth of cut. When the blade angle is set to 45, the depth of cut is decreased. Slide 8 Unit 14 Portable Power Saws Different blades are used with a circular saw for different operations. Slide 9 Unit 14 Portable Power Saws When cutting a compound angle with a circular saw, set the depth of the blade slightly more than the thickness of the material. Slide 10 Unit 14 Portable Power Saws When crosscutting long boards supported by sawhorses, do not cut between the sawhorses. Instead, make a cut past the end of a sawhorse. Slide 11 Unit 14 Portable Power Saws Position the panel to be cut with the waste piece overhanging the supporting panels. Slide 12 Unit 14 Portable Power Saws An adjustable fence attachment aids in making a narrow rip cut with a circular saw. Slide 13 Unit 14 Portable Power Saws A straightedge aids in making a straight cut across a panel. Slide 14 Unit 14 Portable Power Saws Stand to one side of a circular saw during use. Slide 15 Unit 14 Portable Power Saws A reciprocating saw is used for a variety of applications such as cutting a door jamb or notching a stud. Slide 16 Unit 14 Portable Power Saws Different blades are used with a reciprocating saw to cut different materials. Slide 17 Unit 14 Portable Power Saws A jigsaw is used to saw along curved lines and to cut circular and rectangular openings. Slide 18 Unit 14 Portable Power Saws The jigsaw cuts with an orbital movement. The blade cuts on the upstroke and moves slightly away from the material on the downstroke. Slide 19 Unit 14 Portable Power Saws A cutout saw uses a spiral bit to cut openings in wood and nonwood materials such as an opening in gypsum board for a receptacle box. Slide 20 Unit 14 Portable Power Saws A chain saw is used to cut heavy timbers and pilings.

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