{ "item_title" : "Mechanisms and Machine Elements", "item_author" : [" Wilbur M. Ervin "], "item_description" : "A conveyor indexing linkage is a pure geometry problem right up to the moment its crank has to be sized, its pivots have to become real bearings, and its driving motor has to reach it through a gearbox. At that moment it becomes two problems at once, and most engineers were taught those two problems a year apart. Mechanism theory and component design are usually separated by the curriculum. Linkages, cams, and gear trains belong to one course, where the question is what moves and how fast. Shafts, bearings, springs, and bolted joints belong to another, where the question is whether the part survives the load. No real machine respects that division, so the connection has to be assembled privately, without help. This handbook supplies the missing connection, treating motion and the transmission of motion as one continuous subject across sixteen chapters. Methods are built from stated assumptions rather than asserted. Worked examples track every unit and display every intermediate value, with boxed final answers, and practice problems with answer keys close each chapter. By working through it you will be able to:Reduce an assembly to a kinematic diagram, compute its mobility, and recognise when the standard criterion returns the wrong resultSolve position, velocity, and acceleration analytically and graphically, including sliding contact on a rotating memberEvaluate a four-bar for rotatability, transmission angle, mechanical advantage, and quick-return ratio, and design one to meet a stated specificationSelect a cam motion program and lay out a profile with acceptable pressure angle and no undercuttingBalance rotating and reciprocating masses and size a flywheel to a required coefficient of fluctuationAnalyse compound and epicyclic gear trains, then check tooth bending and surface durability against allowable stressSize shafts, keys, splines, couplings, bearings, belts, chains, clutches, brakes, springs, and bolted joints, and apply fits, tolerance stack-ups, and failure analysis to a complete designSI units are primary, with US customary equivalents given wherever American practice still uses them, and the two are never mixed inside one example. Governing standards are named at the point of use, so you always know which document applies and where this book stops. It is written for the upper-level undergraduate working through a machine design sequence and for the practising engineer who wants a desk reference that explains a method rather than merely tabulating its result. Comfort with statics, dynamics, and mechanics of materials is assumed; no prior exposure to kinematics is required. Open the book and begin building the single, connected understanding of moving machinery that the standard two-course sequence leaves you to assemble on your own.", "item_img_path" : "https://covers4.booksamillion.com/covers/bam/9/79/819/312/9798193124191_b.jpg", "price_data" : { "retail_price" : "100.00", "online_price" : "100.00", "our_price" : "100.00", "club_price" : "100.00", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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