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cylindrical spiral gear

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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
... Abstract A cylindrical spiral gear, part of a locomotive axle assembly, cracked ten days after it had been press-fit onto a shaft, after which it sat in place as other repairs were made. Workers at the locomotive shop reported hearing a sound, and upon inspecting the gear, found a crack...
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
..., the set is called a miter gear set. Any change in the number of teeth will change speed as well as direction. Fig. 6 Four types of bevel gears. See text for discussion. Fig. 7 Angles and terminology for straight bevel gears. Spiral Bevel Gears Spiral bevel gears ( Fig. 6b ) have...
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 Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003573
EISBN: 978-1-62708-180-1
... to requirements, leaving the part with insufficient strength. For instance, a part can be damaged by decarburization, as discussed here for a spiral power spring. Figure 8 shows two spiral power springs that were designed to counterbalance a textile-machine beam. The spring at left in Fig. 8...
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
... to expectations because the material or processing does not conform to requirements, leaving the part with insufficient strength. For instance, a part can be damaged by decarburization, as discussed here for a spiral power spring. Figure 8 shows two spiral power springs that were designed to counterbalance...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006791
EISBN: 978-1-62708-295-2
...-scanning, and scratch tests. After a discussion on gear scuffing, information on the material-dependent adhesive wear and factors preventing adhesive wear is provided. adhesive wear coefficient of friction galling metal sliding contacts scoring scuffing seizure scratch tests twist compression...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006806
EISBN: 978-1-62708-329-4
.... Geometry of Sliding Bearings On the basis of geometric shapes, sliding bearings ( Fig. 1 ) are classified into flat, cylindrical, and spherical bearings. Flat sliding bearings include the slideways of machine tools and the thrust bearings that limit the axial movement of rotating shafts. Thrust...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001810
EISBN: 978-1-62708-180-1
... ball bearings for a given envelope size and are usually used in moderate-speed heavy-duty applications. However, in recent years, improved materials and special designs have allowed use of cylindrical and tapered-roller bearings in high-speed applications. The principal types of roller bearings...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001809
EISBN: 978-1-62708-180-1
... bearings. Classification of Sliding Bearings Sliding bearings are usually conformal; that is, the components of a sliding pair fit together fairly closely. The surfaces may be flat, spherical, or cylindrical. Flat surfaces include the slideways of machine tools and the thrust bearings that limit...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006760
EISBN: 978-1-62708-295-2
... the crack initiation. Fig. 8 (a) Beach marks on a steel bolt. (b) Smooth fatigue portion of fracture profile in a metallographic mount of a steel fastener. Nital etch. (c) Scanning electron microscope image showing fatigue striations Shear In a cylindrical part, the stress is applied...
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
... transforms after the surface and before the stress reversal ( Ref 8 ). This is illustrated, in Fig. 12 . If the steel transformation occurs before the thermal stress maximum (sequence 4 in Fig. 12 ), the ferrite/pearlite structure of a cylindrical test specimen is distorted into a barrel shape ( Ref 6...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006834
EISBN: 978-1-62708-329-4
... of the REB. Those classes correspond nearly to the grades PN, P6, P5, P4, and P2 of ISO 492 and ISO 199 (or DIN 620-T2 and DIN 620-T3). Cylindrical roller bearings have rollers with approximate length-to-diameter ratios of 1:1 to 3:1. Needle roller bearings have cylindrical rollers (needles) with greater...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001808
EISBN: 978-1-62708-180-1
... connecting rods contact fatigue corrosion distortion ductile fracture failure investigation fatigue failures fatigue properties metallurgical factors piston rods shafts surface coatings torsional fatigue A SHAFT is a metal bar—usually cylindrical in shape and solid, but sometimes hollow...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... and fracture. Next, the mechanisms of void nucleation and void coalescence are briefly described. Macroscale and microscale appearances of ductile and brittle fracture are then discussed for various specimen geometries (smooth cylindrical and prismatic) and loading conditions (e.g., tension compression...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... article in this Volume, “Fracture Appearance and Mechanisms of Deformation and Fracture.” In a smooth cylindrical tensile specimen, failure most commonly initiates by inclusion-matrix interface debonding near the centerline. This results in a central fibrous region that is normal to the applied load...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006810
EISBN: 978-1-62708-329-4
... are steel; however, many other materials are used in shaft applications. Moving shafts are often classified as either transmission shafts or machine shafts. Transmission shafts are generally cylindrical, and they transfer motion through attached componentry such as gears, pulleys, and so on. Machine...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003530
EISBN: 978-1-62708-180-1
... be remembered that some parts are designed to fracture under certain circumstances. Not doing so may constitute the failure. Shear pins, for example, are commonly used to protect valuable equipment by acting as mechanical fuses. Stress directors in helicopter gearing are also designed so that if gear tooth...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... by acting as mechanical fuses. Stress directors in helicopter gearing are also designed so that if gear tooth fracture occurs, only half the tooth breaks off. This leaves the other half of the gear tooth to carry the load, simultaneously creating sufficient vibration to warn the pilot of imminent failure...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
..., Saxton, cavity transfer mixer, Twente mixing ring, Pineapple mixing head, pulsar, Stratablend, Axon, and double-wave mixers. Common dispersive mixing sections include blister rings, Egan, Maddock, Spiral Maddock, Zorro, CRD, and planetary gears. It is common to use a Grace plot to estimate the success...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006830
EISBN: 978-1-62708-329-4
... Abstract The types of metal components used in lifting equipment include gears, shafts, drums and sheaves, brakes, brake wheels, couplings, bearings, wheels, electrical switchgear, chains, wire rope, and hooks. This article primarily deals with many of these metal components of lifting...