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Screw threads

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290207
EISBN: 978-1-62708-306-5
... the surface finish. Fig. 8.10 Typical assemblies using (a) a bolt and nut and (b) a screw There are many head styles ( Fig. 8.11 ), including protruding tension flange head, protruding shear head, 100° full countersink, and 100° reduced countersink. For structural bolts and screws, the threads...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 April 2013
DOI: 10.31399/asm.tb.imub.t53720117
EISBN: 978-1-62708-305-8
... testing. Servohydraulic systems are generally designed over a wider range of test speeds. Gear driven (or screw driven) machines are electromechanical devices that use a large actuator screw threaded through a moving crosshead ( Fig. 7 ). The screw is turned in either direction by an electric motor...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270196
EISBN: 978-1-62708-301-0
...-injection pumps failed during assembly. The fracture initiated at the thread roots. Fractography indicated brittle intergranular failure. The most probable cause of the failure was hydrogen embrittlement. Max screws failed during assembly in fuel-injection pumps. Their specified heat treatment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270168
EISBN: 978-1-62708-301-0
... a bearing on the screws to a thickness only of 0.8 mm, which is also the pitch of the threads. In addition, the hardness of the screw used is considerably less than that of a new screw, implying lower strength. Because the fire was supposed to be for a short time, and because the screw embedded inside...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250129
EISBN: 978-1-62708-345-4
... is basically the same as that by which screw threads are roll formed, except that in most cases the teeth cannot be formed in a single rotation of the forming rolls; the rolls are gradually fed inward during several revolutions. Fig. 6 Method for forming gear teeth and splines by cold forming. Source...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... of mechanical fastening are in the aerospace, automotive, and construction industries. Machine Screws and Bolts Molded-in Threads Self-Threading Screws Rivets Spring-Steel Fasteners Press Fits Snap Fits Solvent bonding and adhesive bonding are assembly processes in which two or more...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2008
DOI: 10.31399/asm.tb.fahtsc.t51130001
EISBN: 978-1-62708-284-6
... Screws , Handbook of Case Histories in Failure Analysis , ASM International , 1992 , p 332 10.31399/asm.fach.v01.c9001101 21. Risk-Based Inspection , 1st ed. , API Publication 581, American Petroleum Institute , Washington, D.C. , 2000 22. Düren C. , “ Equations...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2021
DOI: 10.31399/asm.tb.tpsfwea.t59300047
EISBN: 978-1-62708-323-2
... be used to measure appropriate angle on part slides, and a similar relationship exist for rolling, as in rolling apples (or similar, mostly spherical fruit) down chutes. One of the most valuable uses of COF is screw on threads. Any critical machine must be assembled with bolts that are tensioned...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870307
EISBN: 978-1-62708-314-0
... on an internal screw mechanism to deform the head and pull it up tight against the structure, whereas the pull-type blind fastener uses a pure pulling action to form the backside head. Higher clamp-up forces larger footprints, and therefore longer fatigue life is obtainable with the threaded-core bolt. However...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610263
EISBN: 978-1-62708-303-4
... form with a flat crest and root. Axial load fatigue tests on “unified” screw threads for use in the United States of America, Canada, and Britain show a somewhat higher fatigue strength than the British Standard Whitworth ( Table 2 ). The unified thread differs from the American Standard thread...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.9781627083010
EISBN: 978-1-62708-301-0
Series: ASM Technical Books
Publisher: ASM International
Published: 15 June 2021
DOI: 10.31399/asm.tb.mpktmse.t56010001
EISBN: 978-1-62708-384-3
.... Fig. 1 Typical tensile testing dog bone Two types of testing frames are used: electromechanical frames that use a motor and lead screw arrangement to stretch the sample ( Fig. 2 ) and hydraulic units that use a hydraulic piston to pull on the sample ( Fig. 3 ). Both systems can provide more...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060149
EISBN: 978-1-62708-261-7
... are of either a one-, two-, or four-screw design. To eliminate twist in the specimen from the rotation of the screws in multiple-screw systems, one screw has a right-hand thread and the other has a left-hand thread. A range of crosshead speeds can be achieved by varying the speed of the electric motor...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040107
EISBN: 978-1-62708-300-3
... of parts formed per minute (i.e., the production rate) provided that feeding and unloading of the machine can be carried out at that speed. The relationships illustrated in Fig. 10.1 apply directly to hot forming of discrete parts in hydraulic, mechanical, and screw presses, which are discussed later...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.9781627083164
EISBN: 978-1-62708-316-4
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.tb.msisep.t59220403
EISBN: 978-1-62708-259-4
... Discontinuities—Part 1: Bolts , Screws and Studs for General Requirements, ISO, 1988 25. “ Standard Specification for Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series ,” F788–13, ASTM , 2013 26. Krauss G. , Steels: Processing, Structure and Performance , ASM...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280189
EISBN: 978-1-62708-267-9
... Other chip-making processes used for superalloys are planing, drilling, screw machining, boring, gear cutting, and tapping. Singlepoint turning is the most frequently used machining process for superalloys. Conventional machining methods find much use with superalloys, because the conventional chip...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780028
EISBN: 978-1-62708-281-5
... the walls of the mold. Injection molding is a batch operation used to rapidly produce complicated parts. Plastic pellets are fed through a hopper into the feed zone of a screw and melted in much the same way as occurs in a single-screw or ram extruder. However, rather than being forced through a die...
Series: ASM Technical Books
Publisher: ASM International
Published: 15 June 2021
DOI: 10.31399/asm.tb.mpktmse.9781627083843
EISBN: 978-1-62708-384-3