1. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Unit 14 Portable Power Tools

2. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Safety Precautions Secure the work Use sharp blades, bits, or abrasives Set up work area in a dry location Wear shoes with rubber soles Use a GFCI Have proper balance and footing Wear eye and face protection Wear appropriate protective clothing

3. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Electrical Cords Always check cord for broken insulation or plugs, bare wires, or any other damage Types –three wires: two carry current for the motor, one is a safety ground wire –two-wires: non-grounded cord

4. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Extension Cords Use three-wire grounded extensions for tools with metal bodies Use a cord longer than needed to reach the job Always be aware of the cord location Wire diameter must be the proper size to carry the electrical current required by the tool being used

5. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Air-Driven Tools Powered by compressed air –compressed air: air pumped under high pressure via special hoses Can be very dangerous, especially when hoses are being coupled/uncoupled Do not uncouple hoses near other people

6. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Nail Guns Used extensively in the construction industry Make sure the gun is pressed firmly to the wood before the trigger is pulled Always wear eye protection

7. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Types of Nailers Electric nailer: work well in soft wood Combustion nailer: do not require an air compressor Brad nailer: the smallest nailer Finish nailer: used for trim work Framing nailer: used for structural framing

8. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Drills Classified by chuck size, power rating, or duty cycle Major parts of a drill –power cord –handle –motor housing –gear chuck –vents –trigger switch –trigger switch lock –reversing switch –chuck wrench/key

9. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Types of Drills Variable speed: motor speed can be controlled by operator Reversible: runs backward and forward Hammering: turns bit while providing a striking action Cordless: powered by rechargeable battery pack

10. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Portable Sanders Sand with the grain for fine work Sand across the grain when –boards are uneven –boards are extremely rough –removing difficult finishes Three types of portable sanders –belt sander –disc sander –finishing sander

11. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Belt Sander Uses a moving sanding belt Make sure work is well secured Major parts –motor housing –handles –belt –belt rollers –belt adjustment –trigger switch –switch lock –power cord –dust bag

12. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Disc Sanders Sanding grit on a revolving plate Can be used for wood or metal Major parts –Motor housing –handles –power cord –switch lock –cooling vents –wheel –spindle –safety guard –tool rest

13. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Finishing Sanders Small sanding pad moving in random forward- backward or circular pattern Generally the power sander used on a project Major parts –motor housing –handles –switch –switch lock –power cord –paper clamps –pad –sandpaper

14. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Saws Useful for carpentry projects and repair activities Types –sabre saw –reciprocating saw –circular saw

15. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Sabre Saws Also called bayonet saw Used to cut curves or holes Up and down saw blade motion Major parts –motor housing –base –blade –toe –blade retention screw –handles –switch –power cord

16. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Reciprocating Saws Also called the tiger saw Operated like a drill Sawing action at the end of the saw rather than underneath Major parts –motor housing –blade retention screw –blade –shoe –vents –handles –power cord –trigger switch –switch lock

17. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Circular Saws Also called a power handsaw Motor-driven, round blade Most popular woodworking saw Very dangerous due to its high speed and tendency to kick back

18. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Circular Saws (continued) Major parts –motor housing –handles –power cord –trigger switch –switch lock –guard –guard lift lever –retractable guard –blade –spindle –base –angle adjustment lock –angle scale

19. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Routers Used to cut grooves and ornamental shapes into soft materials Commonly used for making dado, rabbet, and dovetail joints, installing butt hinges, making signs, and decorative work Use clean, sharp bits for safe, even cuts

20. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Routers (continued) Major parts –base –see-through chip deflector –depth-of-cut lock –depth indicator –handles –motor –switch –depth-of-cut adjuster –collet

21. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Important Terms Sawhorse/trestle: wood or metal beam with legs Ground-fault circuit interrupter (GFCI): breaks the electrical circuit when the operator is threatened by electrical shock Duty cycle: amount of time a motor can run before it needs time to cool off Continuous duty: can be used continuously for 6 to 8 hours a day

22. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Important Terms (continued) Pilot hole: small hole to guide the center point of larger drills Orbital sander: moves in a random circular pattern Grinder: power tool with a spinning, rigid grinding wheel Blind cut: made by piercing a hole with the saw blade