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Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001384
EISBN: 978-1-62708-215-0
...Abstract Abstract The draw-in bolt and collet from a vertical-spindle milling machine broke during routine cutting of blind recesses after a relatively long service life. The collet ejected at a high rotational speed due to loss of its vertical support and shattered one of its arms upon impact...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006826
EISBN: 978-1-62708-329-4
... on the cutting tool; refinement of the primary proeutectic silicon by producing finely dispersed silicon grains through powder metallurgical processing can improve machinability ( Ref 22 ). These alloys must generally be machined with turning speed limitations, coolant, and carbide to avoid excessive cutting...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001030
EISBN: 978-1-62708-214-3
..., it is recommended that all machining of high-strength steels be performed using fixtured equipment with specified and controlled cutting speeds, feeds, and coolants. ...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001583
EISBN: 978-1-62708-217-4
... that “improper machining” happened. Although there may be several factors involved in “improper machining” it is likely that a worn tool, insufficient coolant causing overheating, high cutting speeds, and deep cuts may have acted here on all components. More likely, a worn tool, insufficient coolant causing...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003532
EISBN: 978-1-62708-180-1
..., there are a number of other options available. One option is to planar grind the specimens with a conventional alumina grinding stone. This requires a special-purpose machine, because the stone must rotate at a high speed, ≥1500 rpm, to cut effectively. The stone must be dressed regularly with a diamond tool...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006765
EISBN: 978-1-62708-295-2
..., abrasives become dull more quickly, and the binder must be adjusted to release the abrasives when they become dull, so that fresh abrasive particles are available to maintain cutting speed and efficiency. Consequently, these wheels are called “consumable” wheels, because they wear away with use. If they do...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... dynamometer. When the cutting force deviates from the steady-state constant force condition, the bit must be resharpened or replaced. Feeds and speeds of the drilling operation in combination with changing the cutting angle of the drill bits may also lower the number of fractured bits. In this example...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... of grooves that do not involve direct material removal. The displaced material forms ridges adjacent to grooves, which may be removed by subsequent passage of abrasive particles. Cutting occurs when material is separated from the surface in the form of primary debris, or microchips, with little...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0089429
EISBN: 978-1-62708-223-5
...Abstract Abstract The failure of a high speed steel twist drill which caused injury to the user was investigated thoroughly to settle a legal suit. The drill was being used to remove a stud that broke in the vertical wall of a metalworking machine (upsetter) after drilling a pilot hole...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001269
EISBN: 978-1-62708-215-0
... of titanium nitrided M2 tool steel gear hobs. The hobs were used to produce carbon steel ring gears Applications Circumstances Leading to Failure Sample Selection The hob exhibited excessive wear and fracturing on the leading surfaces of the cutting teeth, as shown in Fig. 1 and 2 . Fig...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001814
EISBN: 978-1-62708-180-1
... in cold-working and hot-working applications. It reviews problems introduced during mechanical design, materials selection, machining, heat treating, finish grinding, and tool and die operation. The brittle fracture of rehardened high-speed steels is also considered. Finally, failures due to seams or laps...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006818
EISBN: 978-1-62708-329-4
... steels • Brownsword R. et al. , Studies of Wear in High-Speed Steel Tools , ISI P126 , Iron and Steel Institute , London , 1971 , p 38 – 42 • Doyle F.D. , Effect of Different Heat Treatments on the Wear of High Speed Steel Cutting Tools , Wear , Vol 27 , 1974 , p 295...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c9001229
EISBN: 978-1-62708-223-5
... stamped out of a sheet made from a 55 kp/sq mm strength steel. The saw blades were used for separating steel profiles at high rotational speeds. The cracks in question were located at the base of the teeth, i.e. at the point of highest operating stress. Metallographic examination showed that all cracks...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001725
EISBN: 978-1-62708-229-7
... and then the turbine tripped out. The steam throttle was immediately closed by the operator and the turbine slowed down to where the overspeed trip could be relatched — a speed estimated by the operator as about 1000 rpm. The throttle was then gradually opened by the operator to bring the unit up to speed before...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003522
EISBN: 978-1-62708-180-1
.... This information needs to be recorded before any parts are cut from the component of interest. A considerable amount of information can be obtained from observation of the direction and sequence in which cracking has occurred. For example, where cracks meet, as illustrated in Fig. 1 , it is apparent that crack “B...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006757
EISBN: 978-1-62708-295-2
..., ceramics are wet-cut (water or a special cutting fluid) with a rotating diamond cutting wheel on a bench-type laboratory machine or on a precision cutting machine. The cutting speed (25 to 500 rpm for a low-speed cutting machine; 500 to 5000 rpm for a high-speed cutting machine) and the cutting pressure...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0091853
EISBN: 978-1-62708-223-5
.... The mill consisted of a heavy gray cast iron frame, a gravity feeder port, a runner, and a heavy-duty motor. The frame and gravity feeder weighed over 200 kg (440 lb) and, in some areas, was over 25 mm (1 in.) thick. To obtain the operating speed of 200 rpm, a gear system was used to transmit the torque...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... Speed Compressors Case #1: Balancing a Large Fan Case #2: Incorrect Selection of Isolators Case #3: High Axial Vibration on a Fan Due to a Disk Wobble Natural Frequency Case #4: High Cross Effect from Fan to Motor Case #5: Unequal Air Gap Case #6: Large 3600 rpm Motor in Venezuela...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001790
EISBN: 978-1-62708-241-9
...Abstract Abstract The failure of a high-speed pinion shaft from a marine diesel engine was investigated. The shaft, which had been in service for more than 30 years, failed shortly after the bearings were replaced. Examination of the shaft revealed cyclic fatigue, with a substantial...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001091
EISBN: 978-1-62708-214-3
... indicates that, contrary to the reported operating conditions of the unit, the shaft must have been intermittently decelerating and accelerating during service. This is the only way that cyclid torsional loads could be induced in the shaft. The reason for the change in speed is unknown. However, a likely...