Download PDF - Gear Technology magazine
Download PDF - Gear Technology magazine Download PDF - Gear Technology magazine
_-----------O&.A------------ Bedllner 'Charts and Gear Inspection Q&A is your interactive gear forum. Send us your gear design, manufactur- ing, inspection or other fiefated ques- tions, and we '/I put them before our panel of experts. Questions may be mailed to Gear Technology, P.O. Box .1426,Elk Grove Village, Ii 60009,USA, faxed to {847} 43Ni61S or sent e/ectTon- ically to people@geartechnology.com. An expanded version of ll&A is also available at www.geartechnology.com. Hundreds of questions have already been posted and answered. Visitors are' welcome to post their own answers. Doub!e R,nk Gill· TUllng / Smgl. "'.nk G.ar Tonini! Me-aslJre-s V'iinltionl in e.nter Distance MiUIJ:t1i' Rbtlltu)rllIl Motion. Fig•.11 - Types lit com,I'0sita gear iinspectioll' .. u .. I IV V)\ .. :V. v I .. , I 1\ J: II I ,..... - T ..,. iii, '\ ... J .\. "" , J , .,u V 'V "'" - ..v v -• , • • . ., • ,. • • .. " .. Tootl1·Numb .. IFig.2 -Stri,p thin ,otdoubl. ·Uank compolil.·test. 2.4 GEAR TECHNOLOGY Robed E. Sm'ith is the principal in R.E. Smilh & Co., gear consultants of Roehester; NY. and one of Gear Technology's technical editors. HI! ha oller 50 years of experitinct! in gllaring and is Ihl! author of numerous {JtIpersandanlcles. He: is also very active in AGMA standards development. Question submitted by Ramiro C. Salinas Co.rpus Christi Army Depot Corpus Christi, TX Q:What are redliner charts.and who still does redliner charts? Answer submitted by: Robert E. Smith R.E. Smith & Co. A: For marty years, the terms "red liner" and "red line charts" have been used by the Fellows Corporation in rela- lion to the:ir line of double flallk com- posite testers, For example, they made Ille No.4 Fellows Fim~-Pllch Red Liner and the No. 12RL Red Liner. Double flank composite gear inspeetion is shown chematically in Figure I. These instruments were in such common use thai. the term "red liner" became synonymous, w.ith double flank composite inspection, The tenn "red line charts" apparently came from the facl that early recorders used pens that wrote with red ink. These were a constant maintenance problem, diue to dogging and spatter. Later recorder u ed thermal writing pens and paper, thermal array printers. or even printer attached to PC computers. Double flank composite testers are made by many different. companies and can use a variety of writing methods that do not produce a "red line" on the chart. To compound the confusion even more, the 'term "compo ite' inspection has been taken to mean double flank composite inspection beeau e it was in such common use. As can be een in Figure I, there is another type of composite inspect jon, called single flank composite, tilat can be used. Today, both type appear in gear quality standards such as AGMA and ISO. Double and single Hartle composite testing results in charts such as thai shown in Figure 2. However, they mean completely different things, As Figure I bows, double flank composite test measure center distance variation as the gears mil Ihrougb light mesh. Single flank composite testing, however, mea- sures rotational motion variation, as the gears roll thrilugh mesh at standard cen- ter distance. with backlash. One can see that the continued use of the term "red liine chart." is not a very good idea. The terms "double flank com- posite chart" or "single flank composite chart" would be more accurate and prevem confusion as to what the data mean . The 0000
There's only one way to ensure th.at the gears you. produce will always detiver superior and quJet performance. MU'e sure they're bred from quality stock. Dura-B~ continuous-cast gray and ductile iron performs like free-machining steel with an important. added bonus - quieter 'ope"atio'D. Lik.e steel. Dura':Bar 'can be austempered, through-hard,ened, Dame-hardened, or Inductscnhardened for added wear resistance. But the superior noise and. vi.bration damping characteristics of Dura':Bar make for quieter running gears. An,d Dura-Barjs 10% Ughter than steel. Dura-Bar round. bars are available in diameters ranging from 518" to 20" and lengths of 6-20'. So you won't need to make major changes in your machining equipment. And our extensive inventory means Dura-Bar is avatlable now - when you need it. When U's, quality material, quiet performance" and quick delivery that count, look to' contlnuoua-cast Dura-Bar for your gear productson needs. Continuous Cast fron BaT Stock: Contact UI for the late.t data OD ,gearDolae. 1·800·BAR·MlLL (227-1l455].' 815·338·1800 '. RaJ:: 815·338-1549 2101)1West Lake SIl.ore Drive. Woodstock. IL 60098-749~ Web, Site: wII/'w.dura·bar.com .' E·mail~ , ales@dlllll·bar.com CIRCLE 158
- Page 1 and 2: - ~- o
- Page 3 and 4: that of conventional HSS tools. Eve
- Page 5 and 6: FEATURES DIRECTORY DEPARTMENTS 64 C
- Page 9 and 10: PUBUSHER"S PAGE I'd like 'to~ "IIII
- Page 11 and 12: Vecto,r Gears Cireie 154 REVOLUTiII
- Page 13 and 14: _ •• _ REVOtU'TIONS, __ I !ew l
- Page 15 and 16: _------------TECHNICALFOCUSII. _ A
- Page 17 and 18: _-----1 TECHINICAL.lfOCUS 1 _ gravi
- Page 19 and 20: _ •••••••••••
- Page 21 and 22: finite element models which were fi
- Page 23 and 24: stresses. Th aforementi.oned dualit
- Page 25: tooth, Till • in turn, limits the
- Page 29 and 30: • -- .HIEATTREAnNG SERVllCiES mRE
- Page 32 and 33: • 1HIEATTREATilNIG SERVICES mRE,C
- Page 34 and 35: F,roml your single source fo,r'comp
- Page 36 and 37: _---------HEATTREAT.IING SERVICES D
- Page 38 and 39: _----------HIEATl1REAT:S:ERVIC'E DI
- Page 40 and 41: _----------IHIEATliREAT SE~RVICED'I
- Page 42 and 43: -ETTING STANDARD, OF VALUE WIITH IC
- Page 44 and 45: • •• C.OMPA!NIYI~NDEX • Cal
- Page 46 and 47: _-------------.COM;PAN.VIN.DEX-----
- Page 48 and 49: _------------COMPANYINDEX----------
- Page 50 and 51: ADVEIRTilSER IIND'EX For more infor
- Page 52 and 53: WANTED? MORE ACCURACY MORE EXPANSIO
- Page 54 and 55: _------------GEAR FUN!DAMENTAlS _ f
- Page 56 and 57: _-----------GlAR FUNDAMiE,NTALS, _
- Page 58: I A;ustempered Ductile Iron {ADI) o
- Page 61 and 62: ,. .~~PR'oDUCTiNIEWS • AI'pha I'n
- Page 63 and 64: GLEASON PFAUTER HURTH --- - Gleason
- Page 65 and 66: Gage Divlision d 001 851 OHIO PIKE.
- Page 68: ACllIfIIfIIIII' pllftlfw",,- The ge
There's only one way to ensure th.at<br />
the gears you. produce will always detiver<br />
superior and quJet performance. MU'e sure<br />
they're bred from quality stock.<br />
Dura-B~ continuous-cast gray and ductile<br />
iron performs like free-machining steel with an<br />
important. added bonus - quieter 'ope"atio'D.<br />
Lik.e steel. Dura':Bar 'can be austempered,<br />
through-hard,ened, Dame-hardened, or Inductscnhardened<br />
for added wear resistance. But the<br />
superior noise and. vi.bration damping characteristics<br />
of Dura':Bar make for quieter running<br />
gears. An,d Dura-Barjs 10% Ughter than steel.<br />
Dura-Bar round. bars are available in diameters<br />
ranging from 518" to 20" and lengths of 6-20'. So you<br />
won't need to make major changes in your machining equipment.<br />
And our extensive inventory means Dura-Bar is avatlable now - when you need it.<br />
When U's, quality material, quiet performance" and quick delivery that count, look to'<br />
contlnuoua-cast Dura-Bar for your gear productson needs.<br />
Continuous Cast fron BaT Stock:<br />
Contact UI for the late.t data OD ,gearDolae.<br />
1·800·BAR·MlLL (227-1l455].' 815·338·1800 '. RaJ:: 815·338-1549<br />
2101)1West Lake SIl.ore Drive. Woodstock. IL 60098-749~<br />
Web, Site: wII/'w.dura·bar.com .' E·mail~ , ales@dlllll·bar.com<br />
CIRCLE 158
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