Autofagia en el control de la calidad intracelular

Adjacent line of action deviation is the maximum allowed deviation between any two consecutive teeth of a given line of action test. Adjacent hob line of action tolerances may be applied to adjacent line of action test results for those cases where the hob has been specified to be manufactured with involute helicoid geometry.

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3--Accuracyrequirements estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC >0.63to123477 >1to223577 Radialtf>2to3.523588 1HubdiameterRadialrunoutof hubdiameter>3.5to6.32461010 1Hubdiameterhubdiameter (see7.3.2.2)>6.3to103581212 (see7.3.2.2) >10to1646101616 >16to2569142323 >25to40813213333 >0.63to112366 >1to212466 Aialtf>2to3.523477 2HubfaceAxialrunoutof hubface>3.5to6.323588 2Hubfacehubface (see7.3.2.1)>6.3to102461010 (see7.3.2.1) >10to163581313 >16to2547111818 >25to40610162626 >0.63to1914224080 >1to2915244285 Radialtf>2to3.51017264895 3OutsideRadialrunoutof tipsofteeth>3.5to6.312193156112 3Outside diametertipsofteeth (see7.4.2)>6.3to1015243970140 (see7.4.2) >10to1620325193185 >16to25284572130259 >25to404165104187374 >0.63to1711173131

n

Straightnessand>1to2712183333

atio n

Straightnessand radialalignment>2to3.5813213737 4Toothface

evia t

radialalignment oftherakeoffset>3.5to6.31015244444 4Toothface

De

oftherakeoffset overthecutting dth>6.3to101219305555g depth (see772)>10to161625407272 (see7.7.2) >16to25223556101101 >25to40325181146146 (continued)

ANSI/AGMA1102--A03NATIONALSTANDARD AGMA2003----Allrightsreserved

Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC >0.63to1914224040 3>1to2915244242 3 Indexdeviation>2to3.51017264848 5Toothfaces2

ation Indexdeviation ofadjacenttooth>3.5to6.31219315656 5Toothfaces2

Devia t ofadjacenttooth faces (see7522)>6.3to101524397070

De

84213657109

(see7.5.2.2) >10to162032519393 184213657109 >16to25284572130130 >25to404165104187187 3>0.63to11626427575 2

3 >1to21728448080 2 Totalindex>2to3.51931508989 6Toothfaces1 on Totalindex deviationoftooth>3.5to6.3233758105105 6Toothfaces

viatio deviationoftooth faces (see7521)>6.3to10294673131131

Dev

(see7.5.2.1) >10to16386096174174 21345678910>16to255384135243243 >25to4076122195351351 7Toothfaces Deviation Flutelead deviationoftooth face(see7.6.2)

Per100mmface width406080100140 (continued)

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC Deviationofthe>0.63to13471428 Deviationofthe toothflank>1to23571529toothflank surfacefrom didtth>2to3.53581733 designedtooth profile>3.5to6.346101939 profile (see7102)>6.3to1058122449 (see7.10.2) >10to16610163264 1thread>16to25914234590 1thread >25to4013203265130 >0.63to13591735 >1to24691837 Deviation>2to3.546102141 Deviation 2threads>3.5to6.358122449 2threads >6.3to1069153061 >10to16813204080 >16to2511182856112 8Toothprofile>25to4016254181162 8Toothprofile >0.63to146102141 >1to247112244 >2to3.558122449 3--4threads>3.5to6.369142958 3--4threads >6.3to10711183672 >10to16915244895 >16to2513213367133 >25to4019304896193 >0.63to157122448 >1to258132551 >2to3.569142857 5--7threads>3.5to6.3710173367 5--7threads >6.3to10813214284 >10to1611172855110 >16to2515243977154 >25to40223556112223 (continued)

ANSI/AGMA1102--A03NATIONALSTANDARD AGMA2003----Allrightsreserved

Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC Deviationofthe toothflank>0.63to159142856 toothflank surfacefrom>1to269152959 surfacefrom designedtooth>2to3.5610173366designedtooth profilewhen usinglineof>3.5to6.3812193978 usinglineof actioncheck>6.3to101015244997 actioncheck (see7.10.2)>10to1613203264129(see7.10.2) >16to2518284590180 1thread>25to40254165130260 >0.63to158132551 >1to258132754 Diti>2to3.569153060 Deviation 2threads>3.5to6.3711183571 2threads >6.3to10914224488 >10to1611182958117 >16to2516264182164 Toothprofile>25to40233759118236AToothprofile >0.63to169153060 >1to2610163264 >2to3.5711183671 3--4threads>3.5to6.3813214284 3--4threads >6.3to1010162653105 >10to1614223569139 >16to2519304997194 >25to40274470140281 >0.63to1711173569 >1to2712183774 >2to3.5813214182 5--7threads>3.5to6.31015244997 5--7threads >6.3to1012193061122 >10to1616254080161 >16to25223556112225 >25to40325181162325 (continued)

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC ThicknessTooththickness>0.63to12228313441 ThicknessTooththickness deviationwhen>1to22430333644deviationwhen measuredina fith>2to3.52733374149 9Toothreferencepitch cylinder>3.5to6.33139444858 9Tooth thicknesscylinder. Tolerancevalues>6.3to103949556072 Tolerancevalues areminus(--)>10to165265727995 Pitchcylinder

areminus() only. (7112)>16to257391101111133 Pitchcylindery (see7.11.2)>25to40105131146160192 Deviation>0.63to12461225 Deviation >1to23471326 >2to3.53571529 0ThreadleadLeaddeviation onadjacentteeth

>3.5to6.33591735 0Threadleadonadjacentteeth (see7.8.2.3)>6.3to1047112243

viation

>10to1669142957

Devi

>16to25813204080 AdjacentTeeth >25to4011182958116 (continued)

ANSI/AGMA1102--A03NATIONALSTANDARD AGMA2003----Allrightsreserved

Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC >0.63to147112244 Leaddeviationin>1to257122447 Leaddeviationin oneaxialpitch>2to3.558132653 oneaxialpitch (see7.8.2.2)>3.5to6.3610163162(see7.8.2.2) >6.3to10812193978 1thread>10to1610162651103 Oneaxialpitch1thread >16to2514233672144Oneaxialpitch >25to40203252104208 >0.63to158142754 >1to269142958 >2to3.5610163264 2threads>3.5to6.3712193876 2threads >6.3to10915244895 >10to1612203163125 Oneaxialpitch>16to2517274488176 1ThreadleadinOneaxialpitch >25to40254063127254 1Threadleadin oneaxialpitch>0.63to1610163264p >1to2711173468 >2to3.5712193876 3--4threads>3.5to6.3914234590 Deviation

3--4threads >6.3to1011182856113 Deviation >10to1615233774149 >16to25203352104209 >25to40294775151301 Onetooth>0.63to1712193775 Onetooth >1to2812204079 >2to3.5914224489 5--7threads>3.5to6.310162652105 5--7threads >6.3to1013203365131 >10to1617274386172 >16to25243860121241 >25to40345487174349 (continued)

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC >0.63to158122550 Leaddeviationin oneaxialpitch>1to258132653 oneaxialpitch, whenusingline>2to3.569152959 whenusingline ofactioncheck>3.5to6.3711173570ofactioncheck (see7.8.2.2)>6.3to10814224387(see7.8.2.2) >10to1611182957115 Oneaxialpitch1thread>16to2516254080161 Oneaxialpitch1thread >25to40233658116232 >0.63to1812204079 >1to2813214284 >2to3.5915234794 2threads>3.5to6.311172855111 2threads >6.3to1014223569138 >10to1618294691183 Oneaxialpitch>16to25254064128256 1AThreadleadinOneaxialpitch >25to40365892185369 1AThreadleadin oneaxialpitch>0.63to1915234794p >1to21016255099 >2to3.511172856111 3--4threads>3.5to6.313213366131 Deviation

3--4threads >6.3to1016264182164 Deviation >10to16213454108217 >16to25304176152304 >25to404369110219439 Onetooth>0.63to111172754109 Onetooth >1to211182958115 >2to3.513203264129 5--7threads>3.5to6.315243876152 5--7threads >6.3to1019304895190 >10to16253963126251 >16to25345588176352 >25to405079127254508 (continued)

ANSI/AGMA1102--A03NATIONALSTANDARD AGMA2003----Allrightsreserved

Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC Threeaxialpitches>0.63to1812193978 >1to2813214183 >2to3.5914234692 2Threadleadin threeaxial Leaddeviationin threeaxial>3.5to6.311172755109 2threeaxial pitchesThreeaxialpitches

threeaxial pitches (see7.8.2.1)>6.3to1013213468136 Deviation

>10to1618284590180 Deviation >16to25253963126252 Onetooth>25to40365791182364 Lineofaction>0.63to12461225 >1to23471326 >2to3.53571529 3Lineofaction

Adjacent deviationalong>3.5to6.33591735 3Lineofactiondeviationalong thelineofaction (see7.12.2.2)>6.3to1047112243

ation

>10to1669142957

Deviat

>16to25813204080 >25to4011182952116 (continued)

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC Active length

>0.63to159142856 length >1to269152959 >2to3.5610173366 4Lineofaction

Totaldeviation alongthelineof>3.5to6.3812193978 4Lineofactionalongthelineof action (see7.12.2.1)>6.3to101015244997

T otal viation

>10to1613203264129

T o devia

>16to2518284590180 >25to40254165130260 areaisdatumreferredtoin6.1. (continued)

ANSI/AGMA1102--A03NATIONALSTANDARD AGMA2003----Allrightsreserved

Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC >0.63to13471327 Threadspacing>1to23471428Threadspacing deviation between>2to3.53581632 between adjacentthreads>3.5to6.34691937 Thread#4 adjacentthreads (see7.9.2.2)>6.3to1057122347Thread#4 Averageposition

() >10to16610153162 Totalthreadlength

Averageposition ofthread#42threads>16to25814224386 Totalthreadlength oneachthread>25to4012203162125oneachthread >0.63to13581632 Thread#3>1to23581734 Averageposition ofthread#3>2to3.54691938 5Threadofthread#3 3--4threads>3.5to6.347112244 5Thread spacing3--4threads >6.3to1059142856 >10to16711183773 Thread#2>16to2510162651103 Averageposition ofthread#2>25to4014233774148 Adjacentdeviationofthread#2 >0.63to14691837 Adjacentdeviation >1to246101939 Thread#1>2to3.547112244 Thread#1 Averageposition5--7threads>3.5to6.358132651 Averageposition ofthread#15--7threads >6.3to10610163264ofthread#1 >10to16813214285 >16to2512193059119 >25to4017274386172 (continued)

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC Threadspacing deviation>0.63to146101939 deviation between>1to246102141 between adjacentthreads,>2to3.557122346 Thread#4

adjacentthreads, whenusingthe lineofaction>3.5to6.359142755Thread#4 Averagepositionlineofaction check>6.3to10711173468 Ttlthdlth

Averageposition ofthread#4check (see7.9.2.2)>10to16314224590 Totalthreadlength oneachthread

(see7.9.2.2) >16to2512203163126 oneachthread 2threads>25to4018284591182 Thread#3>0.63to157122346 Thread#3 Averageposition>1to258122449 Averageposition ofthread#3>2to3.559142755 Thread spacing

ofthread#3 3--4threads>3.5to6.36101632655A spacing3--4threads >6.3to10813204081 >10to1610172753107 Thread#2>16to2515233775150 Averageposition>25to40213454108216 Adjtditi

Averageposition ofthread#2>0.63to158132754 Adjacentdeviation>1to269142857 >2to3.5610163264 Thread#15--7threads>3.5to6.3712193775 Thread#1 Averageposition

5--7threads >6.3to10915234794 Averageposition ofthread#1>10to1612193162124ofthread#1 >16to2517274387173 >25to40243963125250 (continued)

ANSI/AGMA1102--A03NATIONALSTANDARD AGMA2003----Allrightsreserved

Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC >0.63to157122448 Totalthread>1to258132550 Thread#4Totalthread spacing>2to3.569142857 Averageposition ofthread#4 spacg deviation betweenthreads>3.5to6.3710173367 ofthread#4 Totaldeviation

betweenthreads (see7.9.2.1)>6.3to10813214283 4threads>10to1611172855110 Thread#3 Aiti

4threads >16to2515243977154 6ThreadAverageposition ofthread#3>25to40223556111223 6Thread spacing Totalthreadlength hthd>0.63to159142855g oneachthread Thread#2>1to269152958 Averageposition ofthread#2>2to3.5610163365 ofthread#2 5--7threads>3.5to6.3812193977 Thread#1

5--7threads >6.3to10915244897 Thread#1 Averageposition>10to1612203264127 Averageposition ofthread#1>16to2517284589178 >25to40254064129258 (continued)

1102--A03AMERICANNATIONALSTANDARD ©AGMA2003----Allrightsreserved Table3(continued) estTolerances,mm est oElementDrawingObjectoftestPitchrangemodule,Grade o.gjPitchrangemodule, mAAAAAABC Totalthread>0.63to1711173569 Totalthread spacing>1to2711183773 Thread#4spacg deviation betweenthreads,>2to3.5813214182 Averageposition ofthread#4

betweenthreads, whenusingthe lineofaction>3.5to6.3915244997 ofthread#4 Totaldeviationlineofaction check>6.3to1012193061121 check (see7.9.2.1)>10to1616254080160 Thread#3 Averageposition4threads>16to25223556112224 6AThreadAverageposition ofthread#34threads >25to40325181162324 6AThread spacing Totalthreadlength hhd>0.63to1813204080g oneachthread Thread#2>1to2813214385 Averageposition ofthread#2>2to3.5915244895 ofthread#2 5--7threads>3.5to6.311182856112 5--7threads >6.3to1014223570141 Thread#1 Aiti>10to1618294693186 Averageposition ofthread#1>16to25254165130260ofthread#1 >25to40375994188375 Borediameter,mm >8to102.53469

on Borediameter diti>10to13345811 7Borediameter

viati o

deviation, tolerancevalues>13to22456812 7Borediameter

Devi a

tolerancevalues areplus(+)only.>22to326691013

D

areplus(+)only. (see7.2.2)>32to5078111216(see7.2.2) >50to6089121319 >60to80910141620 ofactiontests: themanufacturerdoesnothavethefacilitytoapplyanover--ridinglineofactiontest,thetoleranceontoothprofileandtoothleadelementsareasgivenunderthehead- Test8,Test10,Test11andTest12respectively.However,itispermissibletoincreasethetolerancesontoothprofile,toothlead,andthreadspacingtothevalues forTests8A,11A,15Aand16AandnotcarryoutTest12,providingthetolerancesspecifiedforthetoothspacingalongthelineofaction(Test13sand14)aremet. isthatahobmanufacturercancompensateforerrorsinoneelementbyadjustingtheotherelement,withoutdetrimenttothetoothgeometryaccuracyoftheresulting .Whenthisisdone,thefinalaccuracyofthehobcanonlybemonitoredbythegenerativelineofactiontest.

Annex A (informative)

Gear manufacturing terminology

[The foreword, footnotes and annexes, if any, are provided for informational purposes only and should not be construed as a part of ANSI/AGMA1102--A03, Tolerance Specification for Gear Hobs.]

A.1 Purpose

The purpose of this annex is to provide definitions of gear manufacturing terminology. It is intended to serve as a supplement to the nomenclature which pertains directly to gear cutting tools in clause 3.

A.2 Terminology

approach: linear distance in the direction of feed between the point of initial hob contact and the point of full hob contact.

arbor spacer: hollow cylinder which fits an arbor, and is used to position the hob.

axial feed: rate of change of hob position parallel to the workpiece axis, usually specified in millimeters per revolution of the workpiece.

centering device: ground locating pin used to center a tooth or space of the hob on the centerline of the workpiece.

climb hobbing: rotation of a hob in the opposite direction to the feed of the hob relative to the workpiece at the point of contact.

common factor ratio: in multiple thread hobs, condition wherein the gear tooth--hob thread ratio is not a whole number, but there is a common factor of the number of gear teeth and number of hob threads.

conventional hobbing: rotation of a hob in the same direction as the feed of the hob relative to the workpiece at the point of contact.

cutting speed: peripheral linear speed resulting from rotation, usually expressed as meters per minute (m/min).

drawbar: rod which retains an arbor, adapter or hob shank in the spindle.

even ratio: in multiple thread hobs, condition wherein the gear tooth--hob thread ratio is a whole number.

feed: rate of change of hob position while cutting.

See axial feed, tangential feed, and in--feed.

gear tooth--hob thread ratio: ratio of the number of teeth in the workpiece to number of threads in the

hob. See common factor ratio, prime ratio and even ratio.

grinding cracks: fractures in the hob caused by improper grinding techniques.

hob arbor: device to mount in or on the spindle of a hobbing machine, which is designed to carry and drive an arbor--type hob.

hob shift: axial movement of a hob along its axis to engage a different section with the workpiece, to distribute the hob wear.

hunting ratio: see preferred term prime ratio.

in--feed: radial rate of change of hob position, relative to the workpiece axis, usually specified in millimeters per revolution of the workpiece.

keyseat: pocket, usually in the driving element, in which the key is retained.

overtravel: linear distance in the direction of feed between the last point of full depth cutting by the hob and the point at which the hob disengages the work entirely.

prime ratio: in multiple thread hobs, condition wherein the gear tooth--hob thread ratio is not a whole number, and there is no common factor of the number of gear teeth and the number of hob threads.

scallops: shallow depressions on the generated form produced by hob tooth action.

setting angle: angle used for setting hob swivel to align the hob thread with the workpiece teeth.

sharpening guide: cylindrical part with flutes, having the same lead as the hob flutes, used for guiding the hob along the correct lead when sharpening.

tangential feed: rate of change of hob position along its own axis, usually specified in millimeters per revolution of the workpiece.

undercut: condition at the base of a hobbed workpiece form wherein additional material beyond the basic form is removed. Under certain conditions this may occur naturally, while in other cases it may be produced by intentional modification of the hob tooth.

wear land: cylindrical or flat land worn on the relieved portion of the hob tooth behind the cutting edge.

wobble: motion of a hob when the radial runout varies along the hob length.

Annex B (informative) Hob design parameters

[The foreword, footnotes and annexes, if any, are provided for informational purposes only and should not be construed as a part of ANSI/AGMA1102--A03, Tolerance Specification for Gear Hobs.]

B.1 Purpose

The purpose of this annex is to establish recommended outside diameters and numbers of flutes for gear hobs.

See tables B.1 and B.2.

Table B.1 -- Outside diameter and lead angle of small bore type gear hobs, (multi threads), mm

Type Module 1 thread 2 threads 3 threads

Type (bore)

Module,

m Outside

diameter,d′aφ

Lead angle,γ

Outside diameter,d′aφ

Lead angle,γ

Outside diameter,d′aφ

Lead angle,γ

0.5 24 1.2593 32 1.8636 32 2.796

0.55 24 1.3930 32 2.0584 32 3.088

0.6 24 1.5281 32 2.2548 32 3.383

0.65 24 1.6647 32 2.4529 32 3.681

8 0.7 24 1.8029 32 2.6527 32 3.981

0.75 24 1.9426 32 2.8541 32 4.283

0.8 24 2.0839 32 3.0572 32 4.589

0.9 24 2.3715 32 3.4688 32 5.207

1 24 2.6659 32 3.8874 32 5.837

0.5 32 0.9317 32 1.8636 32 2.796

0.55 32 1.0290 32 2.0584 32 3.088

0.6 32 1.1272 32 2.2548 32 3.383

0.65 32 1.2262 32 2.4529 32 3.681

0.7 32 1.3260 32 2.6527 32 3.981

0.75 32 1.4266 32 2.8541 32 4.283

10 0.8 32 1.5281 32 3.0572 32 4.589

0.9 32 1.7336 32 3.4688 32 5.207

1 32 1.9426 32 3.8874 32 5.837

1.25 40 1.9426 40 3.8874 40 5.837

1.5 40 2.3715 40 4.7471 40 7.131

1.75 40 2.8157 40 5.6382 40 8.474

2 40 3.2758 40 6.5624 40 9.871

0.5 32 0.9317 32 1.8636 32 2.796

0.55 32 1.0290 32 2.0584 32 3.088

0.6 32 1.1272 32 2.2548 32 3.383

0.65 32 1.2262 32 2.4529 32 3.681

0.7 32 1.3260 32 2.6527 32 3.981

0.75 32 1.4266 32 2.8541 32 4.283

13 0.8 32 1.5281 32 3.0572 32 4.589

0.9 32 1.7336 32 3.4688 32 5.207

1 32 1.9426 32 3.8874 32 5.837

1.25 40 1.9426 40 3.8874 40 5.837

1.5 40 2.3715 40 4.7471 40 7.131

1.75 40 2.8157 40 5.6382 40 8.474

2 40 3.2758 40 6.5624 40 9.871

Table B.2 -- Outside diameter and lead angle of gear hobs, (multi threads), mm

Module, 1 thread 2 threads 3 threads 4 threads 5 threads 6 threads 7 threads Module,

m d′_aφ γ z_c d′_aφ γ z_c d′_aφ γ z_c d′_aφ γ z_c d′_aφ γ z_c d′_aφ γ z_c d′_aφ γ z_c 1 50 1.206 15 55 2.183 17 60 2.991 18 85 2.779 23 85 3.475 23 85 4.171 23 85 4.867 23 1.25 50 1.528 15 55 2.762 17 60 3.780 18 95 3.120 25 95 3.901 25 95 4.682 25 95 5.465 25 1.5 55 1.677 15 60 3.057 17 70 3.895 19 100 3.574 25 100 4.469 25 100 5.365 25 100 6.263 25 1.75 55 1.981 16 60 3.608 17 80 3.981 20 110 3.800 27 110 4.752 27 110 5.705 27 110 6.660 27 2 65 1.910 16 70 3.528 17 90 4.048 20 120 3.989 25 120 4.989 25 120 5.990 25 120 6.993 25 2.25 65 2.172 15 80 3.469 17 100 4.101 22 120 4.513 25 120 5.645 25 120 6.779 25 120 7.915 25 2.5 70 2.247 15 85 3.640 18 110 4.145 22 120 5.044 25 120 6.309 25 120 7.578 25 120 8.850 25 2.75 70 2.497 15 85 4.037 18 110 4.589 22 130 5.126 25 130 6.412 25 130 7.701 25 130 8.995 25 3 75 2.547 15 90 4.171 18 115 4.802 22 130 5.622 27 130 7.033 27 130 8.450 27 130 9.871 27 3.5 80 2.816 14 100 4.400 18 125 5.182 22 150 5.688 27 150 7.117 27 150 8.550 27 150 9.989 27

4 85 3.057 14 115 4.370 19 140 5.296 22 170 5.739 27 170 7.181 27 4.5 90 3.276 13 120 4.747 19 150 5.584 22 180 6.123 29 180 7.662 29 5 95 3.475 14 125 5.100 19 160 5.837 22 190 6.470 27 190 8.097 27 5.5 100 3.656 13 135 5.205 19 170 6.062 22 200 6.784 27 200 8.491 27 6 105 3.823 13 140 5.509 18 175 6.459 22 210 7.070 27 210 8.850 27 6.5 110 3.976 13 150 5.578 18 180 6.839 22

7 115 4.117 13 155 5.844 18 190 6.992 22 8 120 4.589 11 160 6.562 17 200 7.662 22 9 125 5.037 11 170 7.010 16 210 8.279 20 10 130 5.465 11 180 7.414 16 220 8.850 19 11 150 5.152 11 200 7.327 16

12 160 5.296 11 210 7.662 15 14 180 5.541 10 240 7.850 15 16 200 5.739 10 270 7.998 15 18 220 5.904 10

20 240 6.042 10 22 250 6.478 10 25 270 6.920 9 28 320 6.431 10 32 350 6.807 9 36 350 7.959 8 40 400 7.662 8 NOTES:

1. d′aφis the outside diameter of the gear hob.

2. γis the lead angle of the gear hob.

3. zcis the maximum number of gashes.

Annex C (informative)

Equations and terminology for straight--sided hob profiles

[The foreword, footnotes and annexes, if any, are provided for informational purposes only and should not be construed as a part of ANSI/AGMA1102--A03, Tolerance Specification for Gear Hobs.]

C.1 Purpose

Hobs conforming to axial or normal profile geometry systems will produce some tip and root relief relative to a true involute on gears cut. This annex provides calculations for these reliefs.

C.2 Symbols

Table C.1 is a list of symbols used in this annex,

along with associated terms. The “Where first used”

column gives the clause or equation number where the particular symbol is first used.

NOTE: The symbols and definitions used in this annex may differ from other AGMA standards. Users should assure themselves that they fully understand the terms, definitions, and symbols as contained in this annex.

Table C.1 -- Symbols used in equations

Symbol Element represented Units

Where first used d_a Any diameter greater than d′oand less than or equal to outside

diameter of gear

mm Eq C.18

d_aφ Contact diameter on hob atd_f mm Eq C.28

d_b Base diameter, gear mm Eq C.3

d_bφ Base diameter, hob mm Eq C.14

d_f Any diameter less thand′oand greater thand_b mm Eq C.26

d_fφ Contact diameter on hob atd_f mm Eq C.21

d′ Pitch diameter, gear mm Eq C.2

d′_aφ Outside diameter, hob mm Eq C.10

d′o Operating pitch diameter, gear mm Eq C.8

d′φ Pitch diameter, hob mm Eq C.10

E_a Profile relief atd_a mm Eq C.23

Ef Profile relief atdf mm Eq C.30

g_a 2x line of action distance to operating pitch diameter mm Eq C.18 g_aφ 2x line of action distance to contact diameter withd_fφ mm Eq C.27

g_f 2x line of action distance tod_f mm Eq C.26

g_fφ 2x line of action distance to contact diameter withd_aφ mm Eq C.19 g′o 2x line of action distance to operating pitch diameter mm Eq C.9

g′_φ 2x line of action distance to hob pitch diameter mm Eq C.16

h_f Dedendum, gear mm Eq C.10

L_g Hob engagement zone mm Eq C.31

L_αr Hob functional profile depth mm Eq C.31

mn Normal module mm Eq C.2

m_no Operating normal module mm Eq C.7

m_nφ Hob normal module mm Eq C.34

pzc Flute lead, hob mm Eq C.37

p_zφ Lead, hob mm Eq C.17

r_b Hob base radius mm Eq C.33

(continued)

Table C.1 (continued)

Symbol Element represented Units

Where first used

r_d Hob radius to inner limit of the functional profile mm Eq C.33

r_o Hob radius to outer limit of the functional profile mm Eq C.33

z Number of gear teeth -- -- Eq C.2

z_c Number of hob flutes -- -- Eq C.36

z_g Number of teeth in engagement zone -- -- Eq C.36

z_φ Number of hob threads -- -- Eq C.11

α_aφ Transverse pressure angle atd_aφ degrees Eq C.29

α_fφ Transverse pressure angle atd_fφ degrees Eq C.22

α_n Normal pressure angle, gear degrees Eq C.1

α_no Operating normal pressure angle degrees Eq C.5

α_nφ Hob normal pressure angle degrees Eq C.32

α_t Transverse pressure angle, gear degrees Eq C.1

α_to Operating transverse pressure angle degrees Eq C.6

α_tφ Transverse pressure angle, hob degrees Eq C.12

α_xφ Axial pressure angle, hob degrees Eq C.13

β Helix angle, gear degrees Eq C.1

β_b Base helix angle, gear degrees Eq C.4

β_c Hob flute helix angle degrees Eq C.37

β_o Operating helix angle, gear degrees Eq C.5

β_φ Helix angle, hob degrees Eq C.11

β_bφ Base helix angle, hob degrees Eq C.15

γb Hob base lead angle degrees Eq C.32

γ Hob lead angle degrees Eq C.32