powerpoint ® presentation unit 14 portable power saws power tool safety circular saws reciprocating...

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Unit 14Unit 14Portable Power SawsPortable Power Saws

Power Tool Safety • Circular Saws • Reciprocating Saws • Jigsaws •

Cutout Saws • Chain Saws

Power Tool Safety • Circular Saws • Reciprocating Saws • Jigsaws •

Cutout Saws • Chain Saws

Unit 14 — Portable Power SawsUnit 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.

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.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

Various configurations of approved grounded outlets are available for construction power tools and equipment.

Various configurations of approved grounded outlets are available for construction power tools and equipment.

Unit 14 — Portable Power SawsUnit 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.

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.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

Side-drive and worm-drive circular saws are frequently used in construction work.

Side-drive and worm-drive circular saws are frequently used in construction work.

Unit 14 — Portable Power SawsUnit 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.

Blade diameter affects the maximum depth of cut. When the blade angle is set to 45°, the depth of cut is decreased.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

Different blades are used with a circular saw for different operations.

Different blades are used with a circular saw for different operations.

Unit 14 — Portable Power SawsUnit 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.

When cutting a compound angle with a circular saw, set the depth of the blade slightly more than the thickness of the material.

Unit 14 — Portable Power SawsUnit 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.

When crosscutting long boards supported by sawhorses, do not cut between the sawhorses. Instead, make a cut past the end of a sawhorse.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

Position the panel to be cut with the waste piece overhanging the supporting panels.

Position the panel to be cut with the waste piece overhanging the supporting panels.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

An adjustable fence attachment aids in making a narrow rip cut with a circular saw.

An adjustable fence attachment aids in making a narrow rip cut with a circular saw.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

A straightedge aids in making a straight cut across a panel.A straightedge aids in making a straight cut across a panel.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

Stand to one side of a circular saw during use.

Stand to one side of a circular saw during use.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

A reciprocating saw is used for a variety of applications such as cutting a door jamb or notching a stud.

A reciprocating saw is used for a variety of applications such as cutting a door jamb or notching a stud.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

Different blades are used with a reciprocating saw to cut different materials.

Different blades are used with a reciprocating saw to cut different materials.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

A jigsaw is used to saw along curved lines and to cut circular and rectangular openings.

A jigsaw is used to saw along curved lines and to cut circular and rectangular openings.

Unit 14 — Portable Power SawsUnit 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.

The jigsaw cuts with an orbital movement. The blade cuts on the upstroke and moves slightly away from the material on the downstroke.

Unit 14 — Portable Power SawsUnit 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.

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.

Unit 14 — Portable Power SawsUnit 14 — Portable Power Saws

A chain saw is used to cut heavy timbers and pilings.

A chain saw is used to cut heavy timbers and pilings.