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gear-tooth

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Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003327
EISBN: 978-1-62708-176-4
... Abstract Mechanical tests are performed to evaluate the durability of gears under load. Gear tooth failures occur in two distinct regions, namely, the tooth flank and the root fillet. This article describes the common failure modes such as scoring, wear, and pitting, on tooth flanks. Failures...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006354
EISBN: 978-1-62708-192-4
... Abstract This article is concerned with gear tooth failures influenced by friction, lubrication, and wear, and especially those failure modes that occur in wind-turbine components. It provides a detailed discussion on wear (including adhesion, abrasion, polishing, fretting, and electrical...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... Abstract Gears can fail in many different ways, and except for an increase in noise level and vibration, there is often no indication of difficulty until total failure occurs. This article reviews the major types of gears and the basic principles of gear-tooth contact. It discusses the loading...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002153
EISBN: 978-1-62708-188-7
..., bore shape, and stock removal. It illustrates the uses of air, ring, expanding, plug, and bar gages for automatic size control in power stroking of honing tools. The article provides a short description of various honing processes, such as external honing, gear tooth honing, plateau honing, flat honing...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005867
EISBN: 978-1-62708-167-2
... the metallurgy of the core. This article provides an overview of gear technology and materials selection. It describes different gear-hardening patterns, namely, tooth-by-tooth hardening, tip-by-tip hardening, gap-by-gap hardening, spin hardening, single-frequency gear hardening, dual-frequency gear hardening...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002375
EISBN: 978-1-62708-193-1
... Table 1 Failure modes of gears Failure mode Type of failure Fatigue Tooth bending, surface contact (pitting or spalling), rolling contact, thermal fatigue Impact Tooth bending, tooth shear, tooth chipping, case crushing, torsional shear Wear Abrasive, adhesive Stress...
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006114
EISBN: 978-1-62708-175-7
... of the Surface Layer , EU Project No. GRD1-1999-10674, Report D15 (M2-W2L), 2002 27. Jones P.K. , Buckley-Golder K. , and Sarafinchan D. , Developing P/M gear tooth and bearing surfaces for high stress applications , Advances in Powder Metallurgy and Particulate Materials , Vol 1...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002145
EISBN: 978-1-62708-188-7
... on transferring the profile from a templet. This method is used in the shaperlike cutting of large tooth forms and in cutting bevel gear teeth on a bevel gear planer. In all these processes, the workpiece is held stationary until a tooth is finished; the piece is then indexed for successive teeth...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005987
EISBN: 978-1-62708-168-9
.... For example, skipping every second or third gear tooth dramatically reduces the distortion. In contrast to carburizing, in which the entire gear mass is heated, induction hardening is highly localized to the surface. In addition to the inductor manipulation, cooling sprays are also controlled to prevent...
Series: ASM Handbook
Volume: 4D
Publisher: ASM International
Published: 01 October 2014
DOI: 10.31399/asm.hb.v04d.a0005952
EISBN: 978-1-62708-168-9
...-hardened parts, the hardenability of the steel must be related to some critical section of the part, for example, the pitch line or the root of a gear tooth. This is best accomplished by making a part of a steel of known hardenability, heat treating it, and then, by means of equivalence of hardness...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005842
EISBN: 978-1-62708-167-2
... Abstract This article focuses on the frequently encountered causes of induction coil failures and typical failure modes in fabrication of hardening inductors, tooth-by-tooth gear-hardening inductors, clamshell inductors, contactless inductors, split-return inductors, butterfly inductors...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002401
EISBN: 978-1-62708-193-1
... for a helical pinion tooth. Courtesy of GEARTECH Fig. 7 Micrographs showing etched cross-sections of (a) a carburized cylindrical test specimen (1.9×) and (b) a carburized gear tooth in which subcase fatigue cracks initiated and propagated during testing. Subcase fatigue, called case crushing...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.9781627081672
EISBN: 978-1-62708-167-2
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005870
EISBN: 978-1-62708-167-2
... into the tooth gap. In this process the tooth flanks as well as the tooth root are hardened ( Ref 34 , 42 ). This kind of heat treatment of gears from steels for induction surface hardening gives a fatigue bending strength in the range from 320 to 490 MPa (46 to 71 ksi). Figure 33(b) shows the same...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005795
EISBN: 978-1-62708-165-8
... and hardened gear made of 8620H steel are shown in Fig. 1 . These data illustrate the importance of well-defined specifications by showing that there are variations in effective case depth even among three areas of the same gear tooth. Fig. 1 Variation in hardness with distance below surface...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006656
EISBN: 978-1-62708-213-6
... be collimated to irradiate a single tooth. Two-dimensional diffraction patterns for both samples are shown in Fig. 18 . Fig. 18 Micro x-ray diffraction two-dimensional patterns for (a) good gear tooth and (b) bad gear tooth Both diffraction patterns in Fig. 18 show the (100) and (200) PMO...
Book Chapter

Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006358
EISBN: 978-1-62708-192-4
... circle, there is pure or nearly pure rolling (depending on the accuracy of gear alignment or lateral vibration). Past this point, slip again occurs between tooth surfaces; it reaches its second maximum just at the point where the surfaces separate. Slip can result in scuffing or adhesive wear damage...
Series: ASM Handbook
Volume: 22B
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.hb.v22b.a0005533
EISBN: 978-1-62708-197-9
.... Source: Ref 3 Table 5 Power requirements for induction hardening of gear teeth Tooth Diametral pitch Approximate length of tooth profile Surface area per tooth (a) Power required per tooth (b) , kW Total power required (c) , kW mm in. 2 cm 2 in. 2 A 3 50 2.0 12.9...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002400
EISBN: 978-1-62708-193-1
...: Processing and Performance , Krauss G. , Ed., ASM International , 1989 , p 239 – 248 34. Slane M.B. , Buenneke R. , Dunham C. , Semenek M. , Shea M. , and Tripp J. , “Gear Single Tooth Bending Fatigue,” Technical Paper 821042, SAE International , 1982 35...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002454
EISBN: 978-1-62708-194-8
... the torque from 50 mJ to over 4 J. The selection was for the three first-stage (low-torque) epicyclic gears. Geometric constraints were a maximum gear diameter of 11 mm and thickness ranging between 1 and 4.5 mm. The torque produced a gear-tooth transmitted shearing/bending force of 35 N. A safety factor...