Machinery’s Handbook, 31st Edition
2916
Index
G ears and gearing
( continued )
G ears and gearing
( continued )
pressure angle 2207, 2214 profile checker settings 2237 rack 2207 ratchet gearing 2294–2295 ratio, defined 2206 relative sizes of internal gear and pinion 2249 replacement gear dimensions 2328 roll angle 2207 root diameter 2207 selection of involute gear milling cutter 2227 shapers, root diameters of gears cut on 2217 size, checking 2300–2318 size factor 2252
heat treatment to permit machining 2319 helical 2204, 2274–2289 herringbone 2289 highest point of single tooth contact (HPSTC) 2206, 2236 hypoid bevel gears 2204, 2257 increasing pinion diameter to avoid undercut or interference 2227 inspection of gears 2248 integral temperature criterion 2254 interference 2206 internal diameter 2206 internal gears 2206, 2249 spur 2204, 2249, 2250 dimensions between wires 2305– 2308 invention 2327 involute curve 2209 length of action 2206 life factor 2252, 2253 line of action 2206 load distribution 2253 lowest point of single tooth contact (LPSTC) 2206, 2234, 2235 lubricant influence 2253 roughness, and speed 2252 lubrication film factor 2253 material quality 2252 materials for 2319–2325 bevel gears 2269 maximum hob tip radius 2235 measuring gear size over wires 2300–2318 teeth 2226 methods of cutting internal gears 2249 metric module gear cutters 2227 module, definition 2206 module system 2296–2298 land 2206 lead 2206
specifications 2242 spur gear 2208–2241 external 2204
internal 2204, 2249, 2250 standard normal diametral pitches 2251
steels for 2319, 2321 straight bevel 2204 surface condition factor 2253 tangential force 2252
tangent plane 2207 teeth invention 2327 terms used in gear specifications 2240 thru-hardening steels for 2319 tip relief 2207 tooth caliper, vernier 2226 tooth face 2207 tooth profile deburring 1632 producing a radius 1632 tooth proportions comparative sizes and shape of 2208 for enlarging fine-pitch pinions 2231, 2232 fine-pitch involute spur and helical gears 2214 tooth stiffness constants 2253 tooth surface 2207 tooth thickness allowance for shaving 2220 tooth-to-tooth composite error 2248 total composite error 2248 total face width 2207 transverse load distribution factor 2253 transverse plane 2207 trochoid curve 2207 true involute form diameter 2207, 2236 undercut 2207 limit for hobbed involute gears 2236 Van Keuren wire diameter 2308
mountings for bevel gears 2259 nomenclature of gear teeth 2208
non-metallic 2324 normal plane 2206 number of teeth 2206
to avoid undercutting 2233
outside diameter 2206 pinions flanges composition 2324 pin method of checking size 2300–2318 pitch diameter 2209 obtained with diametral pitch system 2209 pitch point 2206 plane of rotation 2206 planetary 2290
wear equalizing 2320 welding factor 2254
whole depth 2207 wire diameter 2308 work hardening factor 2252, 2253
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