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M3 3,~'weekdelivery of Pfauter- Maag: PDQ special-form hobsl C.h.eck the chart for hob siz:eswitb guaranteed Pfauter-Maag cuttingtoo~ quaIUy ....tailoredto your tooth form requiremen.ts .••delivered PDQ~! We stock machined PDQ hob blanks, ready for finish grinding., to cover the DP range of 3,to 100. Workilng from your tooth form reference, we'U CADdesign your cutting toot form the grinding wheel and ship your quality tools in just 3 weeks! Allow one extra week for TiNite coating.· Telephone us toll-free with your tooth form details ,(800-435-4176). Or send us your tooth form by FAX.(815-877-0264)., This PDQ program covers gear hobs. involute spline hobs, straight-sided serration hobs, and parallel-key plin hob. Not covered are shanks. tapered bores or periph ry, or dutch keyways. Typical DP Range Diameler lenglh Bore. Mal.rial - 35-100 .750 .500 .315 M42 3().80 1.125 1.125 .500 M42 't---- ~- 16-35 1.875 1.875 .750 I M42 8-20 3.000 3.000 1.250 M3 4-10 4.000 4.000 1.250 1 3-6 5.000 5000 1.500 MS .- Limited Partner.shlp CUffi Tools Purchaser of Sarber-Colman Gear Tools Division 135' Windsor Road', P.O. Sox 2950. t..OV8S Par/{. It 6H32-2950 USA Telephone 815.877-8900' I. fAX 815-B77-0264 CIRClE A~30 ON REAOER IRlfLV CARD See LIS at Sooth #3011
WHETE. ETCHING AREAS ... {continued from page 39) size and direction of the stress, and they can point out possible starting points for flank damage. In order to come to a quantitative conclusion about the definite connection between calculated paths of tension and the formation and direction of WEA on the tooth flanks, ,3 further .ana]ysis must examine the influence of residual stress, which, especiallyat the surface, must not be negleded. It isa1so unclear whether the temperatures that locally occur at the flanks can cause a tempering process, and, thereby, the decay of the WEA structure over a longer time. Ref~l'ences 1. BORG£SE, S.A., A 5t11dy o/the Growth Mechanism 0/ LmticuIar Carbides in Cyclically Stressed 52100 Steel. Research Labor.atory, SKF Industries, Inc., 1968. 2. EYRE, T.S. and BAXTER, A. 'The Formations of While Layers at Rubbing SIH'- faces." Metals and Materials, 1972,,,p. 142-146. 3. KENGERER, F. WCAS, G. and uu- JEKVIST, B,. "Development of Roller Element Steel and Its Matnufacture." Heat Treating Technical R~port 3D, 1975, 2, pages 91·98. Un German) 4. JOACHIM, F.J. .Investigation of Pitting in Heat Treated and Normalized Gears. Dissertation, TU Munch n, 1984. ([n German) 5..KASER, W. Can tn'buting Factors to Pitting on Case-Hardened' Gears. Influence of Case Depth and .Lubrication on the Flank l.oad Carryil1,g Capacity. Disserta- Ilion, TU Milnchen, 1989. (ln German) 6. MARTIN, J.A., 130RGESE:,B.A. and EBERHARD, A.D. "Microstructural Alterations ,of Rollil\g~Bea:ring Steel Unde:rgoing Cyclic Stressing:' Trans. Amer. Soc. Mech,. Eng .. 59, 1966, pp, 555-567. .. 'I. MARTIN, I,A., BORCESE, S.A.. and EBERHARD', A.D. Third Summary Repo.rt on Structural Studies of .Bearing Steel Undergoing Cyclic Stressing. Research laboratory, S](f Industries, lnc., 1967. S. NIEMANN. G. and WINTER, H. Machine Elemenfs, Volume 2, Springer- Verlag, 1983. (In German) .- 9. OSTER, P. The Stress 011 Gear Flanks in Elastic-Hydrodynamic Terms. Dissertation, TU Miinch n, 1982. Un Gelman) 10. SCHLICHT. H. "Regarding th Formalion of White Etching Areas (WEAl in Rolling Elements." Heat Treating TeclmicalRep0r128 (1973) 2. pp, 112-123. (In German) 11. STAHu, G. "Possibilities and Limitations of Rapid Surface Hardening on Steel," Heat Treating Technical Ri?por134 (1979) 2. PI'. SS-6J. (In German) 12. SWAHN, H., BE.CKER, P.c. and VINGSBO, O. "Martensite Decay Durin~ Rolling Contact Fatigue in BaLIBearings." MIior gut' mll\utlCtuNl'l In thelUtomotive IIKI Mlion Industry rely on the' quality 01 HoHmann IPreliur. F)ler Systtml lor IheIr eonvenlionallnd CBN 'grinding appIicIflonJ. The comblllltion of h.igl'l ~ fIHratIon:, ,coolant lemperalUlI' stablllD&n Md mJlt cOUtclIon ' urea manulacturtng at precISIon gem. MetalIrlrgical Tra,ISQctio'I5 A, Vol. 7A, 1976, S. 1099-1110. 13. VOSKAMP, AP., et al., "Gradual Changes in Residual Siress and Microstructure During Contact Faligu in Ball Bearings." Metals Teclmology, 1980, S. 14-21. Acknowledgement: Reprinted willi permission of fhl.' A merican Gear Manufacturers Assoaation. The opi· nions. statements and (onc/usiafl I1reserlti1d,"lhis paper are those of the Authors ,m" ill· no way represellt the positiol1 or opinion of tile AMERICA.N GEAR MANUFACTURERS ASSOCIATION. THE L'EA'DE'R INI GEAR 'GRINIDING IF:ILTRATION Hottmann PrftuRe Fit.. otItr ft\II\y ldY.n ..... uchlS: .' Incrutedlcooflnt IOd ~ IHI • Improved producI quality .lIgnlflcanl reckJctIon '" opemtng COlli SEE US AT ,BOOTH #432-484 & W I IOFFMA'N\J FILTER CORPOR_ATIION 22847 IHESLIP DRIV,E • P,HOINE ,(313) 348-7855 CIRCLE A~31 ,ON REAIDER R1PLV CARD' NOVII, M.IICHliQAN 48050 • FAX (3,13) 348-7901 September/October 1989 45
Page 2 and 3: • ey SpOI_ -----
Page 4: Operator Control P,anell'lor part l
Page 8 and 9: 6 Gear Technol'ocv
Page 10 and 11: .. JlJ,A. ., H...nJ. '..~ ,e~·~.
Page 12 and 13: nd Fine Finishing rt 1 . -Ing, H. S
Page 14 and 15: 8 Matrix CNC Thread Grinders ...
Page 16 and 17: the various modes of current drive
Page 18 and 19: PROCEDYNE MAKES IN ..HOUSE HEAT TRE
Page 20 and 21: White ltching Area Case-Hardened Ce
Page 22: , II Th,e CNiC con'tr,o,lled 'g,ril
Page 25 and 26: face. Correspondingly, the angles o
Page 27 and 28: See us at Booth #125 World Class Ge
Page 29 and 30: a must fo.r a good gear," is very t
Page 31 and 32: clearance for a grinding wheel, and
Page 33 and 34: higher costs, longer delays, and re
Page 35 and 36: charts, relative to proof surfaces
Page 37 and 38: grinding wheel to grind both flanks
Page 39 and 40: GEAR GRINDING tUNDAMENTAl.S .... (c
Page 41 and 42: WH.ITE ETCHING .AREA5 ... (continue
Page 43 and 44: ADVERTISERS'INDEX The advertisersli
Page 45: TECHNICAL CALENDAR SEPffl'i,iIBER12
Page 49 and 50: 1 _, IIILPI 370' ,COMMERCE DR 1FT.'
Page 51 and 52: FOR ASTE •. I Booth, #545 EA·SY

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