Machinery’s Handbook, 31st Edition
Index
2945
P olygon
P lastics
( continued )
( continued )
radius of circumscribed circle 81 radius of inscribed circle 78, 81 P olygon shafts 2361 connections 2361 dimensions of 2361 manufacturing 2362 strength of connections 2362 three- and four-sided designs 2361 P olyol-esters 2509 P olyphase motors 2646, 2649 P olyurethane 586, 2689 P orous bearings 2440 P ortable grinding 1332 safety 1313 P ortable tools hexagonal chucks for 1040 spindles and drives for 1037–1040 P ositive clutches 2530, 2573 P otential energy 188, 189 P oundal 2865 P ounds force 157, 158 force into newtons 2864 mass 158 metric conversion 2860–2862 P owder bed fusion (PBF) 1555, 1556 P owdered metal alloys copper base 390 density 390 elongation 390 hardness 390 iron base 390 tungsten base 390 P owdered metal bearings 2440 P owder metallurgy 1522 characteristics of metal powders 1523 friction and flow characteristics of particles 1526 angle of repose 1526 powder flow 1527 packing, density, and porosity 1527 bulk density 1528 packing factor 1528 porosity 1528 true density 1528 particle shape and internal structure 1525
welding
induction 599 spin 599 vibration 598–599
yield point 559, 565 yield strength 565
P lates flat, strength and deflection of 288–290 thin flat, radius of gyration 235 P lating 1640–1647 chromium 1609 magnesium anodic treatment 1642 magnesium coating 1642 phosphate coating 1645, 1646 surface coatings 1640 zinc 1647 P low steel rope, strength of 2714–2719 P lunge angle 845 P lunger (Sinker) method. See EDM perforated metal 2705 plastics 565–566 for various materials 208, 290, 391 P olar moment of inertia 239–240, 251–255 cone 255 frustum 255 cylinder, hollow 253 ellipsoid 254 formulas 253–255 masses 239 P neumatics 2810 P oise 2504, 2873 P oisson’s ratio 208 flat plates 288 pyramid 253 solid ring 254 spherical sector 254 spherical segment 254 torus 254 P olar section modulus 251–252 P olishers, spindles for portable 1039 P olishing and buffing 1633 abrasives 1633, 1636 operations 1636 speeds 1636 wheels, material 1633 See also specific materials and processes P olyalkylene glycols 2508 P oly-alph-olefins 2508 P olygon area 78, 81–83 of forces 161 formulas and table 81 length of side 81 paraboloid 254 plane areas 239 prism 253
aspect ratio 1525 shape factor 1526 sphericity 1526 particle size measurement and distribution 1523 Fraunhofer diffraction 1524 Laser diffraction method 1523 Mie theory 1524 screening method 1523
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