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2 Chapter Hand Tools. 2 Chapter Hand Tools Objectives Identify the various types of hand tools. Describe the advantages and disadvantages of each type.

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Presentation on theme: "2 Chapter Hand Tools. 2 Chapter Hand Tools Objectives Identify the various types of hand tools. Describe the advantages and disadvantages of each type."— Presentation transcript:


2 2 Chapter Hand Tools

3 Objectives Identify the various types of hand tools.
Describe the advantages and disadvantages of each type of hand tool. Select the proper hand tool for the job. Demonstrate skills in using various hand tools. Demonstrate how to use hand tools safely. Maintain, repair, or replace damaged tools. Demonstrate good craftsmanship in the performance of daily tasks.

4 Tools for Technicians Acquire quality tools Care for them properly
Skillfully use them Always use the correct tool for the job

5 Wrenches Most widely used type of hand tool
Used to hold or turn nuts, bolts, cap screws, and other fasteners Applying too much torque can strip threads or break off bolt heads Always use wrenches safely Know when to repair or replace

6 Types of Wrenches Open-End Box-End Open jaw on each end
Closed on both ends

7 Types of Wrenches (Cont.)
Combination Has one open-end and one box-end Refrigeration Service Designed to turn refrigeration service valve stems Can have ratcheting feature Ritchie Engineering – YELLOW JACKET Products Division

8 Types of Wrenches (Cont.)
Flare-Nut Box wrench with an opening in the box Use to turn flare nuts Adjustable Has a movable lower jaw Turn so force is on the fixed jaw

9 Types of Wrenches (Cont.)
Allen Also known as a hex key Hardened steel shaft with a hexagonal shape Available in different styles

10 Socket Wrenches Individual, cylinder-shaped box-end attachments used with a handle Handles often have ratcheting feature Socket openings may be 4, 6, 8, or 12-point

11 Pliers Used to grip, cut, crimp, hold, or bend various materials
Choose the correct type of pliers for the job Always use pliers safely Know when to repair or replace

12 Types of Pliers Lineman’s Long-Nose Have a strong side-cutting feature
Useful electrical tool Long-Nose Allow technicians to reach into tight places Available in a variety of nose designs

13 Types of Pliers (Cont.) Diagonal Cutting Pump
Designed for cutting electrical wires, cotter pins, nails, and other fasteners Pump Used for gripping round, square, flat, and hexagonal objects Size opening adjustable through tongue and grooves

14 Types of Pliers (Cont.) Slip-Joint Adjustable
Designed for gripping, turning, and bending Two jaw opening sizes Adjustable Different types available

15 Types of Pliers (Cont.) Locking
Use a compound leverage system to lock the jaws for holding various shapes and sizes of work

16 Screwdrivers Used to drive or withdraw threaded fasteners
Available in wide variety of shapes and sizes Reversible screwdrivers have a different tip at each end of the shank Interchangeable bit screwdrivers Screw-holding screwdrivers

17 Nut Drivers 6-point socket head
Useful for removing and replacing small hex head screws and nuts Available in a range of sizes

18 Hammers Used for various striking operations
Use the correct hammer for the job and use it properly Always use hammers safely Know when to repair or replace

19 Types of Hammers Nail Ball Pein Curved claw and straight claw
Different sizes for light and heavy work Ball Pein Designed for use when riveting, shaping, and straightening metal Also used when striking chisels and punches

20 Types of Hammers (Cont.)
Soft-Faced Used where steel hammers would mar or damage the workpiece Engineer’s Designed for heavy-duty striking Also called “sledge hammer”

21 Types of Hammers (Cont.)
Setting Have square corners and straight sides Designed for sheet metal work Klein Tools, Inc.

22 Hacksaws Used to cut all types of metal objects
Blades are selected according to the number of teeth per inch At least two teeth should contact the metal being cut Can use one or two hands on the saw to make cuts

23 Twist Drill Bits Used to cut small-diameter holes in metal or wood
Made up of shank, body, and point Available individually and in sets

24 Wood Bits Designed to drill into wood, plastic laminate, plaster, foam insulation, and similar materials Common wood bits: Spade-type Auger-type

25 Other Types of Drill Bits
Hole Saws Designed for cutting holes Used on steel, aluminum, copper, brass, sheet metal, stainless steel, wood, or plastics Masonry Used for drilling brick, stone, concrete, and ceramic materials Star drills designed for hand-drilling holes

26 Snips Used to cut sheet metal, screens, gaskets, and straps
Four basic types Straight-pattern, combination, duckbill, and aviation Other types Curved blade, bulldog, double-cut, and jeweler’s Always use snips safely

27 Straight Snips Used for making straight-line cuts
Available in different sizes

28 Combination and Duckbill Snips
Used for cutting curves in either direction May be used for straight-line cutting

29 Aviation Snips Uses compound lever for less effort to cut than other types of snips Made of alloy steel Cutting blades are serrated Available in straight, left-hand, and right-hand patterns

30 Punches Used to mark parts before disassembly
Used to make an indentation in metal before drilling Common types of punches Center Prick Pin

31 Cold Chisels Used to cut off damaged or badly rusted nuts, bolts, rivet heads, or other fasteners Do not use dull chisels or those with a mushroomed head Edge can be sharpened with hand file or whetstone

32 Repair or Replace Do not use worn out or broken tools
Damaged tools will not do the job properly They can put the users and others at risk Repair or replace worn tools as required Replacing a tool is a small cost compared to the cost of an injury or time wasted by poor performance

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