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installation torque

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Published: 01 January 2000
Fig. 46 Torque-angle diagram for installation tightening signature More
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Published: 01 January 2000
Fig. 49 Breakaway torque audit showing the torque breakaway point related to the installation torque More
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Published: 30 January 2024
Fig. 3 Fracture surface of a high-strength steel bolt that fractured immediately upon application of the installation torque. The fracture surface is viewed under ultraviolet light illumination. Fluorescing material on the fracture surface indicates penetration of thread lubricant More
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003323
EISBN: 978-1-62708-176-4
... on a threaded fastener. However, for many noncritical fasteners, where safety or the functional performance of an assembly is not compromised, it may be acceptable to specify and monitor torque alone. The most common measurement tools are hand torque wrenches that are used for installation and torque audit...
Series: ASM Handbook
Volume: 4F
Publisher: ASM International
Published: 01 February 2024
DOI: 10.31399/asm.hb.v04F.a0007007
EISBN: 978-1-62708-450-5
... of mixers to be installed will provide the invested torque required per mixer. The invested torque at the selected rpm ( N ) can then be used to calculate the invested BHP using: (Eq 21) BHP = ( T q 63025 ) N where T q is total invested torque, and N is selected operating rpm...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003427
EISBN: 978-1-62708-195-5
.... Often, design data must be generated to account for this, by testing joints with fasteners installed at typically 50% of normal installation torque ( Ref 5 ). Fig. 8 Slippage of composite plies under load Chamfering of Holes Whether or not chamfering should be required for composite...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... with an installation torque range of 7.3 to 8.5 N · m (65 to 75 lbf · in.). Dimpled fracture features indicated that the head cracks were caused by overload; however, chemical analyses, hardness tests, and microstructural examination showed that the fasteners were within specifications. Unused fasteners and nuts from...
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
... being installed on type 7075-T6 fasteners with an installation torque range of 7.3 to 8.5 N · m (65 to 75 in. · lb). Dimpled fracture features indicated that the head cracks were caused by overload; however, chemical analyses, hardness tests, and microstructural examination showed that the fasteners...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002149
EISBN: 978-1-62708-188-7
... and help stop uncontrolled catastrophic events. Machining torque was generally quite high with very low revolutions per minute (rpm) (speeds less than 30 m/min, or 100 sfm), making this overload sensing technique quite effective for the 1930s and 1940s. With the mass production of the automobile...
Series: ASM Handbook
Volume: 1
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v01.a0001018
EISBN: 978-1-62708-161-0
... specifications are necessary as a guide to proper design, application and installation. All American Society for Testing and Materials (ASTM) and Society of Automotive Engineers (SAE) specifications covering threaded fasteners require that the fastener be marked for grade identification ( Table 1 ). Grade...
Book Chapter

Series: ASM Handbook
Volume: 6A
Publisher: ASM International
Published: 31 October 2011
DOI: 10.31399/asm.hb.v06a.a0005555
EISBN: 978-1-62708-174-0
... a welding flux to stabilize the welding arc and to deoxidize the weld area. The most commonly used flux is commercially pure aluminum, which is installed onto the weld end of the stud by thermal spraying, staking, or pressing a slug into a drilled hole in the end of the stud ( Fig. 7 ). Studs that are 6.4...
Series: ASM Handbook
Volume: 6
Publisher: ASM International
Published: 01 January 1993
DOI: 10.31399/asm.hb.v06.a0001360
EISBN: 978-1-62708-173-3
... the weld area. The most commonly used flux is commercially pure aluminum, which is installed onto the weld end of the stud by thermal spraying, staking, or pressing a slug into a drilled hole in the end of the stud ( Fig. 7 ). Studs that are 6.4 mm (0.250 in.) and under usually do not require fluxing...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006501
EISBN: 978-1-62708-207-5
... of mechanical joining can be summarized as follows: Stress concentration at fastener holes reduces durability/life. Relatively low joint efficiencies are obtained. Obtaining and maintaining proper preload (torque) on an installed fastener can be problematic. Some high-performance fasteners...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005740
EISBN: 978-1-62708-171-9
...—Cost Reduction The torque converter is a gearbox using the dynamic action of fluid. Conventionally, the pump impeller was assembled by brazing, using a copper wire or copper foil installed on the blades. To simplify installation of the brazing material, electric arc spray was used to install...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006837
EISBN: 978-1-62708-329-4
... is that the cap screw torques holding the bearing end cap in place are low when compared to the installation torque. The normal bolt torques are in the range of 290 to 420 lb/ft, depending on the bearing size. If the torques are less than the specified values, the preload of the bearing cartridge assembly...
Series: ASM Handbook Archive
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000623
EISBN: 978-1-62708-181-8
... roots. The nut (collar) of the aerospace fastener is designed to break in two when a specific installation torque is reached. The joint is then created by the remaining, tightened half of the collar and its mating threaded pin. In this case, however, the titanium alloy pins from a single manufacturer...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006821
EISBN: 978-1-62708-329-4
... of aircraft component and system-level failures that resulted from various factors, including operational stresses, environmental effects, improper maintenance/inspection/repair, construction and installation issues, manufacturing issues, and inadequate design. aircraft accident investigation aircraft...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009011
EISBN: 978-1-62708-185-6
... measuring 24 by 6 mm (0.9 by 0.2 in.). Lower strain rates can be obtained by installation of other fixed-ratio gear boxes between the hydraulic speed reducer and the clutch assembly. The maximum torque available at the highest strain rate is limited by the power rating of the motor, which...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.a0003327
EISBN: 978-1-62708-176-4
...) Contact stress = ( P ′ × B ) 1 / 2 × E F where the contact force per unit width, P ′, is: (Eq 2) Pinion torque Pinion base radius × effective face width and (Eq 3) B = R 1 + R 2 R 1 × R 2 where B is the geometry factor, R 1...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002368
EISBN: 978-1-62708-193-1
...) and the torque or cut-off to develop the required tension is averaged ( Ref 22 ). An alternate criterion for tightening bolts is the “turn-of-nut” method, Fig. 6 , developed in the railroad and automotive industries. Bolts are installed to a specified rotation from the “snug-tight” condition. “Snug-tight...