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Locking devices

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0089254
EISBN: 978-1-62708-225-9
... Abstract A failed tapered-ring sprocket locking device consisted of an assembly of four tapered rings that are retained by a series of cap screws. The middle wedge-shaped rings were pulled closer as the screws were tightened forcing the split inner ring to clamp tightly onto the shaft. One...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001138
EISBN: 978-1-62708-231-0
... Fig. 1 Side View Of Hi-Rail. Fig. 2 Rear View of Hi-Rail. Fig. 3 Piston Cylinder Arrangement. Fig. 4 Fracture Surface. Abstract Abstract A hi-rail device is a vehicle designed to travel both on roads and on rails. In this case, a truck was modified...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003500
EISBN: 978-1-62708-180-1
... ). A design deficiency involving improper materials selection was revealed through the analysis of a failed tapered-ring sprocket locking device. The device is used to attach a chain sprocket to a shaft without the use of a locking key, enabling the shaft to either drive or be driven anywhere on the shaft...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... selection was revealed through the analysis of a failed tapered-ring sprocket locking device. The device is used to attach a chain sprocket to a shaft without the use of a locking key, enabling the shaft to either drive or be driven anywhere on the shaft ( Fig. 8 ). The configuration consists of an assembly...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
...-and-nut bearing surfaces, and the use of locking devices, the assumption is that the initial clamping force will be sustained during the life of the fastened joint. This assumption cannot be made in elevated-temperature design. At elevated temperature, the induced bolt load will decrease with time...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001265
EISBN: 978-1-62708-215-0
... beads, methyl methacrylate monomer polymerized in place, and barium sulfate, which serves as a radiopacifier) or by the growth ofbony tissue into the interstices of metal beads sintered onto the metal substrate. This porous structure allows bone tissue to grow into and mechanically lock the device...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001485
EISBN: 978-1-62708-225-9
..., or deflections due to excessive tightening of the bolts, can result in race distortion. It is therefore essential that housings of this form embody dowelling or other devices to ensure that they can be reassembled only in the position in which they were machined. Local flaking of the inner race may result from...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003502
EISBN: 978-1-62708-180-1
... parking area was the most heavily used door in the building. It was exposed to all weathers and the automatic device for damping the door movement and closing it after use required frequent maintenance. One windy Saturday, a woman was about to enter the post office through this door when a gust...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006829
EISBN: 978-1-62708-295-2
..., serious surface tears were observed, proving that surface damage induced by fretting (i.e., vibration during transport) can significantly affect any production process if packaging aspects are not carefully considered ( Ref 34 ). Fretting can also occur in certain orthopedic devices, particularly...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001803
EISBN: 978-1-62708-241-9
...Abstract Abstract Metallurgical SEM analysis provides many insights into the failure of biomedical materials and devices. The results of several such investigations are reported here, including findings and conclusions from the examination a total hip prosthesis, stainless steel and titanium...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003562
EISBN: 978-1-62708-180-1
... the load on the remaining wires. However, in the locked coil rope that is designed with shaped wires to give an almost solid outer structure ( Fig. 4 ), fretting debris with a greater volume than that of the metal from which it was formed can lead to the forcing apart of the wires, with the escape...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001817
EISBN: 978-1-62708-241-9
... wires . J. Mater. Proc. Tech. 171 , 894 – 902 ( 2006 ) 3. Parameswaran P. , Raghunathan V.S. , Hiremath S.C. , Paknikar K.R. : Failure of locked coil wire rope of coal handling system . Eng. Fail. Anal. 10 , 395 – 404 ( 2003 ) 10.1016/S1350-6307(03)00019-0 4...
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
... Destroying Impellers on Large Circulating Water Pumps Case #4: Low Pump Flow Destroying Antifriction Bearings in a Pump Case #5: Cracks in Large Vertical Pump Shafts Case #6: Problems with Boiler Feed Pumps Case #7: Containment Spray Pump-Mass Addition Case #8: Coupling Lock Up of Nuclear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
... of these advantages are lost when any optical or electron-optical device is used. Particular attention should be given to the surfaces of fractures and to the paths of cracks. The significance of any indications of abnormal conditions or abuse in service should be observed and assessed, and a general assessment...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003533
EISBN: 978-1-62708-180-1
... in operation while a sample is inserted through an air-lock into the specimen chamber. Such ports can significantly improve productivity by eliminating the need to turn the microscope off and vent the chamber each time the operator wishes to examine a new sample. The introduction of low-pressure...