3 Chapter Basic Hand Tools

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.

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

Tool Storage Toolbox Tools left lying on the floor are a safety hazard Stores and protects tools not in use Tools left lying on the floor are a safety hazard (Snap-on Tool Corp.)

Wrenches Wrenches Wrench size Used to install and remove nuts and bolts Wrench size Measured across wrench jaws Stamped on side of wrench Conventional (inches) Metric (millimeter)

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)

Other Wrench Types Allen wrench Hexagonal (six-sided) shaft-type wrench Used for set screws on pulleys, gears, and knobs

Screwdrivers Remove or install screws Come in many shapes and sizes Standard has single blade Phillips has 2 crossing blades (Snap-on Tool Corp.)

Types of Wrenches Open-end wrenches Box-end wrenches Combination wrenches Line wrenches Ratcheting wrenches Socket wrenches

Tools Ratchet Torque Wrench Socket Extension

Pliers Used to grip, cut, crimp, hold, and bend various parts Various types

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

Chisels and Punches Chisels Punches Cut off damaged or rusted nuts, bolts, and rivet heads Punches (Snap-on Tool Corp., OTC/SPX Corp., and Proto Tools)

Files Remove burrs, nicks, sharp edges Perform other smoothing operations Classified by length, shape, and cutting surface (Starrett)

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

Tools Pry Bars Wire Brush C Clamp Insulated Pliers Claw type pick up tool Scraper