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Morgan Documents Morgan Construction Company records

July 2014

STELCO Bevel Gears for Finishing Mills; Trip toIndiana Gear with Darle DudleyMaurice Knott

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Recommended CitationKnott, Maurice, "STELCO Bevel Gears for Finishing Mills; Trip to Indiana Gear with Darle Dudley" (2014). Morgan Documents. Book214.http://digitalcommons.wpi.edu/ms077morgan-docs/214

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"i"O: As I oted oA 1::: 5 August 1965

-· o~:: !-A:aurice Knott

SUi3Jf.:Ci: STELCO Bevel Cea~ .. ·s for Finishj_ng MiLs Trip t•.:> Indiar;:.a Gear vJith Da.rle Dudley

DISCUSSION~

The bevel geaxs that v:Jere to be shipped last F:-.·iday" 30 July0

are listed beJowo On retu.Tning from rny last visit to Indiana Gea:'* 0 1. repo-·ted that the tooth surfaces of ·;:1 e gea:t· member 1645B_OA had a poo-r finish0 an estiq1ated 125 1-nic:roincheso This n1.e1nher had been lapped \'li:!hen we ar:rivedo T 1e rough0

to-... n look ·v2.s elirninated by the lapping.. Only a fe\v of the · deepe!" tear H.11es reraained" Darle Dudley J·hought it v.ras :£i11e.,

After loo!~ing at the :finish on a:"l of the gears listed belo·,tJ except 16497?., and at so1ne of the other gears that -vvill be · s hipped later 0 it was decided that any with a surface finish \Vhich '\vas not ·as good as .164975B ·would be lapped.,

Indiana Gear felt that tha roughness wol.;!ld ha.,Fe v.ro:& .. n off g:rac~fully in service ..

Tooth BeaTing ----------------~------------------------------~----------------------~---~ l64575A-B 164577A-B

Lapped fo1· Too·:·h BrgJ

1645 '19A-B Lapped foi' Finish

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On two sets.,· 164575 and 164975s the tooth be2.Ting at the diife:l.'ent test _ ositions was as illustrated by Figu:~:e L The shift o£ the beu:ring to the he.el ·with o:f:fset is Gleasoi-~s est:i.n:.c;.te of ,;;hat vrill happen unde:r loacL In the case o:': these ·'-\70 ce·ts

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S~~E;LC.Q BeveJ. .-ea:·s :':o1· Finisl ing J./Iills t.;:·:~:ip :o India:;.:ta 1e2.r '\Vith Da:t."le D:.HD.ey ----· -------~------------w-------~--

Page 2 5 A 1gust 1965

it w2.s decided that the bec.ring should not go (Jff the he·el as showno Al Korn.1nann said that the bee.ring at the heel co\.tJ.d be eased off, and the r.est o:': the bearing lengthened to,Na.:.:-ds the toe" by lapping a.t the basis 1nounting d.ista:o.ce vrith .. 020tt o:E:fseto Da1. .. le Dudley called Mike Fallon at Gleason fo:.t.· his opinion., He recommended :not havin.g the bea:dng go off the heel a.nd said tha·t: they ·\x1ould use the s~nne 1na.nne1 of co3:·:::·ective la.pping.,

1\.Aike Fall n w-as also asked his intention on introducing of:fset.. Was a satis1actory tcoth contact to be obtained ·with the offset in.d:;,'oduced at the ::.na]cilnu.m; or cold mounting dista;~.!ce? Indiana Gear normally introduces the offset at the basic mounting distal'lCe:~ the expected runnh:.g pos!t~.ono Fis anS\"Jer '\Vas that the contact should stay satisf.acto1 .. y with the offset introduced at either positiono Our dra'\ving should bo made specific about this.. C' " ----

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Actually:> ·when you look at Figure 1 p it appears that the offset tooth contact is about the sar.a.e fer beth positionso

3~. _!ooth Spacing

I:e.diana is going to zecord their tooth spacing check (Gleason Teste:;:) for one set of each of the gea? ra.tics and handso This will be sixteen records of tooth spacing.

The :records looked at on l'v1~nday sho,:z.;-ed the spacing to be ve:-f.'y good., One decision n"lade e:.t the tirne ¥:-as to accept .. 0004u as the max:ir.rn.:tn_ tooth to too'!:h pitch variation, r.ather -··han .. 0003°a The o 0004H \Vas ' Lat Da.:r.le Dudley u::iginaHy asked for and \vhat Gleason l"ecommended.. Theze ,:r,e:s.e sever<?,! ., 0004" i!alnes on the several r.eco:i."ds :revi~nved<! On one geaz-11 \Vhich M1·.. Dudley t1ad 1·echecke6, the two highest variat:io::.:ts shi£-.;ed their positions on the second check<\ Since the bulk of the va.xiations are \Vell unde:. ., 000411~ it v1as reasoned that these occas:oual highs that chang locatio:L al"e reilecting finish rathe1a than actual spacing<

4o Tensile Test Specin'lens

Da~-y & United~s order calls for tensile specimens for each heat t:t:"eatment batch" This reqt.:.est vuas overlooked ou the STELCO o:rde:r., They 117i.ll

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STELCO Bo-rel Ge?.:F?s :for ~t:.nishing lViiH:: rr· ... l·~·~ :·o 1'l1,.Fan·a G'c:::--,.. ~rr~·~·h J·J .... -· .. le )"'!,.,_ .,;;Ie~}r . ~ :~JJ l.f -. ~ • ~- •• 1-....::::;._.~-~--~~::.:: ...... ~~-:__.__

Page 3 5 A ~gust l 965

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On future orders Incl.ia.na Gea.~.. hope3 to obta-in the l'equi!"ed case hal"dneas with a lovlel· co:re ha:.•dnesso . This change is being znade to oh'·aj.l'l z- mo:re machi:n.eable 1naJ·e!'ial.., D~;;:-le . Dudley \V~.s asked fo-s: a l'l1inirn"lun figtn•e f· 1· CQ?e harcbJ.ess a:.d he :'!"ecc:o-n:ne:nde.d

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