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straight gears

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Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... Abstract This article first reviews variations within the most common types of gears, namely spur, helical, worm, and straight and spiral bevel. It then provides information on gear tooth contact and gear metallurgy. This is followed by sections describing the important points of gear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001499
EISBN: 978-1-62708-236-5
... Abstract Three spur gears made from 8622 Ni-Cr-Mo alloy steel formed a straight-line train in a speed reducer on a rail-mounted overslung lumber carrier. The gears were submitted for nondestructive examination and evaluation, with no accompanying information or report. Two teeth on one...
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
... of a spur gear are radial, uniformly spaced around the outer periphery, and parallel to the shaft on which the gear is mounted. Contact between the mating teeth of a spur gear is in a straight line parallel to the rotational axes, lying in a plane tangent to the pitch cylinders of the gears (a pitch...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001498
EISBN: 978-1-62708-218-1
... of single-tooth contact. The cause of failure was tooth-tip interference from the mating gear teeth. Because the mating parts within the assembly had not been returned or examined, unanswered questions remained. Axles Interference Mining Motor trucks 43BV12 Rolling-contact wear Fatigue fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c0092155
EISBN: 978-1-62708-221-1
... and splines in areas showing little damage established that the parts had been manufactured in conformance with the engineering drawings. The splines were straight axially and convex radially. However, the gear teeth that failed were convex in both directions in the vicinity of the pitch line. This design...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001844
EISBN: 978-1-62708-241-9
...Chemical composition of gear material (wt.%) Table 1 Chemical composition of gear material (wt.%) C Si Mn P S Cr Ti Cu Fe Analysis 0.26 0.28 0.87 0.014 0.012 1.08 0.05 0.015 Bal. 30CrMnTiA 0.24–0.32 0.17–0.37 0.80–1.10 ≤0.035 ≤0.035 1.00–1.30 0.04–0.10...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001414
EISBN: 978-1-62708-221-1
... Abstract The fracture of a clevis which formed part of the derricking gear of a large crane showed well developed conchoidal markings. These were associated with a principal origin on the outer surface at about the mid-width of the section. A number of secondary origins were apparent along...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048164
EISBN: 978-1-62708-217-4
... Abstract A flat spring for the main landing gear of a light aircraft failed after safe execution of a hard landing. The spring material was identified by chemical analysis to be 6150 steel. The fracture was found to have occurred near the end of the spring that was inserted through a support...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001095
EISBN: 978-1-62708-214-3
... for examination. Circled area surrounds the intact 1 4 -20 cap screw. Fig. 6 Motor housing after partial reconstruction of the gear side. Circled areas (1 to 3) are locations of specimens of threaded engagement for SEM examination. Fig. 7 Optical photograph of the motor side...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001291
EISBN: 978-1-62708-215-0
... Fig. 1 Main landing gear sliding strut provided for destructive examination. Arrow indicates region that was hard chromium plated. Wheel axle is at lower end. Fig. 2 Indications of cracking in the hard chromium plating (arrow) at the axle (lower) end. Note the banded appearance...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001763
EISBN: 978-1-62708-241-9
... with cracks at root Fig. 2 Technical drawing of the reverse shaft, on which a pinion gear and jawed coupling are secured with multiple splines. The shaft has an outer diameter of 15 mm and root diameter of 12 mm at spline tooth Fig. 3 Finite element model of a spline shaft, consisting...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006850
EISBN: 978-1-62708-395-9
... surface of an eroded polyurethane. Source: Ref 53 . Reprinted under the terms of the Creative Commons Attribution 3.0 License. © 2017 The Author(s). Licensee IntechOpen Fig. 15 Acetal gear wear from under loads of (a) 7 Nm, (b) 10 Nm, and (c) the surface debris (×500). Reprinted from Ref 54...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003571
EISBN: 978-1-62708-180-1
... failure of an antifriction bearing, a nylon driving gear, and a polyoxymethylene gear wheel. antifriction bearing cohesive wear elastomers glassy thermoplastics interfacial wear lubricant mechanical properties nylon nylon driving gear plastics polyoxymethylene gear wheel semicrystalline...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
..., internal gear pumps, and accumulators to minimize pressure fluctuations. Different types of hydraulic couplings (with a wide range of sizes) were used; the type generally depended on whether the couplings were used to connect piping or to plug into equipment. Some couplings (termed stud-standpipe adaptors...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001848
EISBN: 978-1-62708-241-9
... ) 10.1016/j.engfailanal.2008.08.008 4. Santos C.A. , Aguilar M.T.P. , Campos H.B. , Pertence A.E.M. , Cetlin P.R. : Failure analysis of the die in the third hot forging stage of a gear blank . Eng. Fail. Anal . 13 , 886 – 897 ( 2006 ) 10.1016/j.engfailanal.2005.07.005...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
..., or buckling, may or may not be permanent deformation, depending on whether or not the yield strength was exceeded. Long, slender, straight bars, tubes, or columns under axial compressive forces will buckle when the buckling load is exceeded. Buckling failure may also be encountered on the compressive sides...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... was exceeded. Long, slender, straight bars, tubes, or columns under axial compressive forces will buckle when the buckling load is exceeded. Buckling failure may also be encountered on the compressive sides of tubes, I-beams, channels, and angles under bending forces. Tubes may also buckle due to torsional...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
... is a commonly encountered representation of mean-stress effects, but other models (e.g., Gerber and Soderberg) are also used ( Fig. 2 ). The two straight lines and the curve shown in Fig. 2 represent the three most widely used empirical relations. The straight line joining the alternating fatigue strength...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... therefore be based on loads, nominal stresses, structural stresses, or local stresses. For elastic-plastic behavior, local strains should be the basis of the assessment. The finite-life regime in a double-log plot (log S a -log N ) can be approximated by a straight line. Using any reference point...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003510
EISBN: 978-1-62708-180-1
... the areas of mass. Avoid sharp corners and reentrant angles. Avoid sharp corners between heavy and thin sections. Avoid single internal or external keys, keyways, or splines. Provide adequate fillet or radius at the base of gear teeth, splines, and serrations. Do not have holes in direct line...