Machinery’s Handbook, 31st Edition
Index
2915
G ears and gearing
G earing materials forged and rolled
( continued )
( continued )
checking
alloy steels 2320 carbon steels 2320
gear sizes 2300–2318 pressures 2248 spur gear sizes 2310–2313 chordal measurement of teeth 2315, 2316, 2317 circular pitch system 2209 coefficient of friction 2253 contact ratio factor 2235, 2252, 2253 crossed helical 2204 deburring tooth profile 1632 design of bevel gear blanks 2258 diametral pitch
non-metallic 2324
applications 2325 bore sizes 2326 diametral pitch for given power 2326 diametral pitch for given torque 2327 keyway stresses 2326 mating gear 2325 power-transmitting capacity 2325 preferred pitch 2326 safe working stress 2325 tooth form 2325
definition 2205 preferred 2215 system 2209
sintered materials 2322 steel castings 2321 G ears and gearing 2274–2318 active face width 2204 active spline length 2332 actual safety factor 2253 actual space width 2332 actual tooth thickness 2332 AGMA Standards 2243, 2247 angular backlash 2242–2248 arc of action 2204
drawing
data for spur and helical gears 2242 information to be given on 2251
efficiency 2206 elasticity factor 2252, 2253 endurance limit 2253 enlarged pinion fine-pitch 2229
meshing without backlash 2233 reduced dimensions to avoid interference 2225
epicyclic 2290–2293 equivalent pitch radius 2206 external spur gears 2204
of approach 2204 of recession 2204 thickness of internal gear tooth 2249 thickness of pinion tooth 2249 pitch 2204 plane 2204 thickness 2205 backlash 2242–2248, 2314 angular 2248 recommended 2244 bearing spacing and shaft stiffness 2259 bevel gears 2256–2268 blanks design of 2240 for fine pitch gears 2239 bottom land 2205 bronze and brass castings for 2322 bulk temperature thermal flash factor 2254 bushings for gears 2324 calculated safety factors 2253 calculating dimensions of milled bevel gears 2262 replacement gear dimensions 2328 spur gear proportions 2210 axial
dimensions for checking over wires 2301–2304
face advance 2206 Fellows stub tooth 2216 fillet
radius 2206 stress 2206 finishing gear milling cutters 2229 flank of tooth 2206 forged and rolled alloy steels for gears 2320 carbon steels for gears 2320 formed cutters for bevel gears 2266 formulas
given center distance and ratio 2216, 2218 for helical gears 2274, 2276, 2277, 2278, 2279, 2280, 2282, 2285 to mesh with enlarged pinion 2233 for module system gears 2296, 2298 for spur gears 2210, 2211, 2214, 2216, 2217
gear ratio, definition 2206 geometrical factor 2253, 2254 given center distance and ratio 2218 harder pinion 2320
case-hardening steels for 2319 change gears, for lathe 2181
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