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CHAPTER 4 © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT for SALE OR DISTRIBUTION NOT for SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION CHAPTER 4 © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC. NOT FOR SALE OR DISTRIBUTION. 056754_CH04_p106-125.indd 106 3/12/14 9:24 PM © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Identifying Locking © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning,4 LLC DevicesNOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Primary Learning Objectives © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALEAfter reading OR DISTRIBUTIONthis chapter, you will be able to: NOT FOR SALE OR DISTRIBUTION 1. Identify types of threads, nuts and bolts. (pp. 109–111, 113) 2. Identify types of washers and screws. (pp. 108–109, 111–112) 3. Use a torque wrench to tension nuts. (pp. 115–119) 4. Identify pins and© keys. Jones (pp. 119–121) & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Knowledge Objectives After© readingJones this & chapter,Bartlett you Learning, will be able to: LLC © Jones & Bartlett Learning, LLC 1.NOT Identify FOR locking SALE devices OR and DISTRIBUTION tools. (pp. 108–114) NOT FOR SALE OR DISTRIBUTION 2. Describe fasteners and torque. (pp. 114–115) 3. Identify locking device measuring tools. (pp. 115–119) 4. Describe helical inserts. (p. 119) © Jones & Bartlett5. Identify Learning, locking pins and LLC keys. (pp. 119–121) © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Skills Objectives © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC After reading this chapter, you will be able to: NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION 1. Use a torque wrench and torque angle gauge. (p. 119) PROCEDURE 4-1 2. Remove and install split pins. (p. 119) PROCEDURE 4-2 © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION 107 © Jones & Bartlett Learning, LLC. NOT FOR SALE OR DISTRIBUTION. 056754_CH04_p106-125.indd 107 3/12/14 9:24 PM 108 CHAPTER 4 Identifying Locking Devices There are a number of special screws that cut their own © Jones & Bartlett Introduction Learning, LLC © Jones & Bartlett Learning, LLC threads as they go. This is called tapping a thread. Pictured NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Locking devices used in the motorcycle industry are pri- in FIGURE 4-4A is a self-tapping screw. It is made of hard marily designed to hold things in a particular location material that cuts a mirror image of itself into the hole as or to hold things together. These devices come in many you turn it. The screw in FIGURE 4-4B is also known as a forms, and depending on the particular application, one self-tapping screw, but it is designed for cutting and holding or more types of locking© Jones devices &may Bartlett be used. Learning, They can LLCthin sheet metal, so it is often© used Jones on motorcycle & Bartlett bodies. Learning, LLC be in the form of a physicalNOT FOR fastener SALE and/or OR chemicalDISTRIBUTION NOT FOR SALE OR DISTRIBUTION adhesive. This chapter provides a description of the types of locking devices found in motorcycle design. Locking© Jones & DevicesBartlett Learning, and Tools LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Fasteners There are many different fasteners used in motorcycle applications, including screws, bolts, studs and nuts. © Jones &Washers Bartlett and Learning,chemical compounds LLC can be used to help© Jones & Bartlett Learning, LLC NOT FORsecure SALE these OR fasteners. DISTRIBUTION NOT FOR SALE OR DISTRIBUTION A Screws Screws are generally smaller than bolts and are some- times referred to as metal threads FIGURE 4-1 . They can © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC have a variety of heads, they’re used on smaller compo- nents, and often theirNOT thread FOR extends SALE right OR from DISTRIBUTION the tip NOT FOR SALE OR DISTRIBUTION to the head so they can hold together components of different thickness. Different screws can be tightened with a range of tools. An Allen© Jones head screw& Bartlett has a recessLearning, for an AllenLLC wrench © Jones & Bartlett Learning, LLC FIGURENOT 4-2 .FOR An Allen SALE head OR screw DISTRIBUTION is sometimes called a NOT FOR SALE OR DISTRIBUTION cap screw. It usually screws into a hole rather than a nut, and it needs tightening with an Allen wrench. A machine screw has a slot for a screwdriver B FIGURE 4-3 . Screwdrivers come in many sizes and you © Jones &should Bartlett always Learning, use the correct LLC size blade for the particular© JonesFIGURE & Bartlett 4-2 A. An Learning, Allen head screw. LLC B. Allen wrenches. NOT FORmachine SALE screwOR DISTRIBUTION slot. NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION FIGURE 4-1 Screws are generally smaller than bolts and are © Jones & Bartlettsometimes referred Learning, to as metal LLC threads. © JonesFIGURE & Bartlett 4-3 A machine Learning, screw. LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC. NOT FOR SALE OR DISTRIBUTION. 056754_CH04_p106-125.indd 108 3/12/14 9:24 PM CHAPTER 4 Identifying Locking Devices 109 © Jones & Bartlett Learning, LLC © Jones &TECHNICIAN Bartlett Learning, TIP LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Threads are cut on screws, bolts, nuts and studs and inside holes to allow components to be attached and assembled. There was a time when there were many different thread designs used throughout the world. © Jones & Bartlett Learning, LLCModern motorcycles still use© a Jonesrange of thread& Bartlett patterns, Learning, LLC NOT FOR SALE OR DISTRIBUTIONbut due to standardization, itNOT is getting FOR much SALE simpler OR DISTRIBUTION FIGURE 4-5 . Nearly all the nuts, bolts, screws and studs on a motorcycle have a V-thread cut into them. A screw jack or a clamp has square threads cut into it. The square thread is more difficult to machine and is © Jones & Bartlett Learning, LLC used mainly© Jonesin situations & Bartlettwhere rotational Learning, movement LLC ANOT FOR SALE OR DISTRIBUTION needs to NOTbe transferred FOR SALE into lateral OR movement—for DISTRIBUTION example, the screw in a vise where the rotary move- ment of turning the handle is translated into the lateral movement of the jaws closing. © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOTBolts, FOR SALEStuds ORand DISTRIBUTION Nuts Bolts, studs and nuts are fasteners designed for heavier jobs than screws and tend to be made of metal or metal alloys. Bolts are cylindrical pieces of metal with a hex- © Jones & Bartlett Learning, LLCagonal head on one end and© aJones thread cut& Bartlettinto the shaft Learning, LLC NOT FOR SALE OR DISTRIBUTIONat the other end FIGURE 4-6NOT. They FOR are often SALE bigger OR than DISTRIBUTION screws and are used for heavier jobs. Bolts are always threaded into a nut or hole that has an identical thread cut inside. The thread acts as an inclined plane; as the bolt © Jones & Bartlett Learning, LLC is turned, it© is Jones drawn into & Bartlett or out of theLearning, matching thread.LLC Nuts are often used with bolts. A nut is a piece of BNOT FOR SALE OR DISTRIBUTION metal, usuallyNOT hexagonal, FOR SALE with ORa thread DISTRIBUTION cut through it to fit the bolt thread. The hexagonal heads for the bolt FIGURE 4-4 Self-tapping screws. and nut are designed to fit tools such as combination wrenches and sockets FIGURE 4-7 . © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION o Acme thread Square thread 29 worm thread ©P Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC P P o NOT29 FOR SALE OR DISTRIBUTION NOT FORo SALE OR DISTRIBUTION W W 29 F F D D D C C © Jones & Bartlett Learning, LLC © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION Standard thread shapes © Jones & BartlettFIGURE 4-5 Learning, Standard thread LLC shapes. © Jones & Bartlett Learning, LLC NOT FOR SALE OR DISTRIBUTION NOT FOR SALE OR DISTRIBUTION © Jones & Bartlett Learning, LLC. NOT FOR SALE OR DISTRIBUTION.
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