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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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Presentation on theme: "PowerPoint ® Presentation Unit 14 Portable Power Saws Power Tool Safety Circular Saws Reciprocating Saws Jigsaws Cutout Saws Chain Saws."— Presentation transcript:

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

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.

4 Unit 14 — Portable Power Saws Various configurations of approved grounded outlets are available for construction power tools and equipment.

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.

6 Unit 14 — Portable Power Saws Side-drive and worm- drive circular saws are frequently used in construction work.

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.

8 Unit 14 — Portable Power Saws Different blades are used with a circular saw for different operations.

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.

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.

11 Unit 14 — Portable Power Saws Position the panel to be cut with the waste piece overhanging the supporting panels.

12 Unit 14 — Portable Power Saws An adjustable fence attachment aids in making a narrow rip cut with a circular saw.

13 Unit 14 — Portable Power Saws A straightedge aids in making a straight cut across a panel.

14 Unit 14 — Portable Power Saws Stand to one side of a circular saw during use.

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.

16 Unit 14 — Portable Power Saws Different blades are used with a reciprocating saw to cut different materials.

17 Unit 14 — Portable Power Saws A jigsaw is used to saw along curved lines and to cut circular and rectangular openings.

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.

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.

20 Unit 14 — Portable Power Saws A chain saw is used to cut heavy timbers and pilings.


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