3Basic Hand Tools

Chapter

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Objectives

After studying this chapter, you will be able to:• Identify common automotive hand tools.• List safety rules for hand tools.• Select the right tool for a given job.• Maintain and store tools properly.• Use hand tools safely.• Explain why insulated tools must be used when

servicing electric drive trains.• Correctly answer ASE certification test questions

referring to hand tools.

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Tool Rules• Purchase quality tools, they are lighter, stronger, easier to use, and

more dependable than off-brand, bargain tools• Keep tools organized• Keep tools clean- wipe clean and dry after use• Use right tool for job

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Tool Storage

• Toolbox– Stores and protects

tools not in use

– Tools left lying on the floor are a safety hazard

(Snap-on Tool Corp.)

Permission granted to reproduce for educational use only.© Goodheart-Willcox Co., Inc.

Wrenches

• Wrenches– Used to install and remove nuts

and bolts

• Wrench size– Measured across wrench jaws

• Stamped on side of wrench

– Conventional (inches)– Metric (millimeter)

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Socket Wrenches• Socket

– Cylinder-shaped – Remove nuts and bolts– 1/4”, 3/8” and 1/2” drive sizes– 6pt and 12pt (most common)– Deep or shallow– Chrome or impact– Socket size printed on

Socket (ex 13/16” or 21mm)

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Other Wrench Types

• Allen wrench– Hexagonal (six-sided) shaft-type wrench

• Used for set screws on pulleys, gears, and knobs

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Screwdrivers

• Remove or install screws• Come in many shapes and sizes• Standard has single blade• Phillips has 2 crossing blades

(Snap-on Tool Corp.)

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Types of Wrenches

• Open-end wrenches• Box-end wrenches• Combination wrenches• Line wrenches• Ratcheting wrenches• Socket wrenches

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Tools

SocketTorque Wrench

Ratchet

Extension

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Pliers

• Used to grip, cut, crimp, hold, and bend various parts

• Various types

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Hammers

• Used for operations that involve striking tool or part• Various types

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Chisels and Punches

• Chisels– Cut off damaged or rusted nuts, bolts, and rivet

heads

• Punches

(Snap-on Tool Corp., OTC/SPX Corp., and Proto Tools)

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Files

• Remove burrs, nicks, sharp edges• Perform other smoothing operations• Classified by length, shape, and cutting surface

(Starrett)

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Hacksaw and vise• Hacksaw

– Cut metal – Select appropriate

blade for job– Teeth should point

away from handle• Place one hand on handle

and other on end of frame• Vise – used to hold parts

during cutting

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Tools

C Clamp

Pry Bars Wire Brush

Scraper

Insulated PliersClaw type pick up tool