9 Objectives The student should be able to Describe what tool is the best to use for each job Discuss how to safely use hand tools Explain the difference between the brand name trade name and the proper name for tools ID: 583920
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Slide1
HAND TOOLS
9Slide2
Objectives
The student should be able to:
Describe what tool is the best to use for each job.
Discuss how to safely use hand tools.
Explain the difference between the brand name (trade name) and the proper name for tools.
Explain how to maintain hand tools. Slide3
Wrenches
Most used hand tool by service technicians
Most are constructed of forged alloy steel
Available in fractional and metric sizesSlide4
Figure 9-4
The end of a box-end wrench is angled 15 degrees to allow clearance for nearby objects or other fasteners.Slide5
Figure 9-7
The end of a typical line wrench, which shows that it is capable of grasping most of the head of the fitting.Slide6
Figure 9-3
A typical box-end wrench is able to grip the bolt or nut at points completely around the fastener. Each end is a different size.Slide7
Figure 9-8
A typical ratchet used to rotate a socket. A ratchet makes a ratcheting noise when it is being rotated in the opposite direction from loosening or tightening.
A knob or lever on the ratchet allows the user to switch directions.
¼”, 3/8”, ½”Slide8
TECH TIP
Clockwise to Tighten Counter to loosen
It is sometimes confusing which way to rotate a wrench or screwdriver, especially when the head of the fastener is pointing away from you. To help visualize while looking at the fastener, say “righty
tighty
, lefty
loosey
.”
BACK TO
PRESENTATIONSlide9
Figure 9-10
The most commonly used socket drive sizes include 1/4 in., 3/8 in., and 1/2 in. drive.Slide10
Figure 9-11
A 6-point socket fits the head of the bolt or nut on all sides. A 12-point socket can round off the head of a bolt or nut if a lot of force is applied.Slide11
Figure 9-16
Deep sockets allow access to the nut that has a stud plus other locations needing great depth, such as spark plugs.Slide12
Figure 10-6
A black impact socket. Always use impact-type sockets whenever using an impact wrench to avoid the possibility of shattering the socket, which can cause personal injury.Slide13
Figure 9-9
A typical flex handle used to rotate a socket, also called a breaker bar because it usually has a longer handle than a ratchet and, therefore, can be used to apply more torque to a fastener than a ratchet.Slide14
Ratchets, Sockets, and Extensions
Torque Wrenches
Two basic types:
Clicker-type
Beam- or dial-type Slide15
Figure 10-3
A typical 1/2 in. drive impact wrenchSlide16
Figure 9-17
A flat-tip (straight blade) screwdriver. The width of the blade should match the width of the slot in the fastener being loosened or tightened.Slide17
Figure 9-18
Two stubby screwdrivers that are used to access screws that have limited space above. A straight blade is on top and a #2 Phillips screwdriver is on the bottom.Slide18
Figure 9-20
An impact screwdriver used to remove slotted or Phillips head fasteners that cannot be broken loose using a standard screwdriver.Slide19
Figure 9-21
A typical ball-peen hammer.Slide20
Figure 9-22
A rubber mallet used to deliver a force to an object without harming the surface.Slide21
Figure 9-24
Typical slip-joint pliers, which are also common household pliers. The slip joint allows the jaws to be opened to two different settings.Slide22
Figure 9-28
Needle-nose pliers are used where there is limited access to a wire or pin that needs to be installed or removed.Slide23
Figure 9-27
Diagonal-cut pliers are another common tool that has many names.Slide24
Figure 9-29
Locking pliers are best known by their trade name Vise-Grip
®
.Slide25
Figure 9-42
A typical beginning technician tool set that includes the basic tools to get started.Slide26
Figure 10-9
A fluorescent trouble light operates cooler and is safer to use in the shop because it is protected against accidental breakage where gasoline or other flammable liquids would happen to come in contact with the light.