Page 456 - Analysis and Design of Machine Elements

Index
434
Wear (contd.) ZI worm 235
galling 10, 334 ZN worm 235
running-in 335 Worm diameter factor 236
scoring 10, 334 Worm gearing see Wormgear drive
scuffing 10, 182, 241, 334 Wormgear
seizure 10, 334 allowable bending stress 247
wear process 335 allowable contact stress 247
Wedge effect 126 bending life factor 247
Welded joints 110 contact life factor 247
butt joint 110 scuffing 241
corner joint 110 structure 253
edge joint 110 transverse module 236
lap joint 110 transverse pressure angle 236
T-joint 110 Wormgear drive 233–254
Welding 109 central plane 235
residual stresses 110 centre distance 237
types of 109 efficiency 244
Welds 110 failure modes 241
allowable stress 112 geometry and terminology 235
butt welds 110 lubrication 253
fillet welds 110 materials 246
White cast iron 17 meshing efficiency 244
Width series 297 self-locking 244
Woodruff keys 92 sliding velocity 239
Worm 235 speed ratio 239
allowable deflection 244 types of 234
axial module 236 Wormgear drive, types of 235
axial pitch 237 cylindrical 235
axial pressure angle 236 double enveloping 235
equivalent friction angle 244 single enveloping 235
lead 237 spiroid 235
lead angle 237 toroidal 235
number of threads 237
reference diameter 236 y
worm diameter 236 Yield 396
worm shaft 253 Yield strength 30
Worm, type of Young’s modulus see Elastic modulus
Archimedean worm 235
involute helicoid worm 235 z
straight-sided normal worm 235 Zinc alloys 17
ZA worm 235 Zone factor 186