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hole drilling

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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
... Abstract This chapter covers basic machining and assembly operations, with an emphasis on hole preparation for mechanical fasteners. It describes manual, power feed, and automated drilling techniques as well as reaming and countersinking. It discusses various types of fasteners, including...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270107
EISBN: 978-1-62708-301-0
... the rivets were removed carefully from the rib by drilling. The rib itself was removed in order to examine the inner side of the rivet holes. The inner surface of the skin and the outer surface of the rib were found coated with soot. The crack emanating from the rivet hole A′, viewed from the...
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
... were recorded for turning, for drilling/reaming the smaller-diameter holes, and for tapping. Table 10.2 compares the machining characteristics of three widely used superalloys representing the three alloy classes: iron-nickel-base (A-286), nickel-base (Inconel X-750), and cobalt-base (Haynes 25...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2000
DOI: 10.31399/asm.tb.ttg2.t61120313
EISBN: 978-1-62708-269-3
... factors are determined by the depth of the hole drilled, which, in turn, determines drill life. Successful drilling can be accomplished with ordinary high-speed steel drills. One of the most important factors in drilling titanium is the length of the unsupported section of the drill. This portion of...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230339
EISBN: 978-1-62708-298-3
... the center of the part. Using run-off material as well as light cuts may also be helpful. When drilling or tapping through holes, backup support (brass or free-cutting mild steel fixtures) should be used to minimize breakthrough damage. Any steel scrap can readily be separated magnetically from the...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740213
EISBN: 978-1-62708-308-9
...: Grinding burns on high-strength steel Untempered martensite in drilled holes in steel components Grinding cracks in the root sections of cast nickel-base gas turbine buckets Lower fatigue strength of parts processed by electrical discharge machining Distortion of thin components Residual...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2015
DOI: 10.31399/asm.tb.tpmpa.t54480293
EISBN: 978-1-62708-318-8
... drill using techniques considered as conventional for other materials. Thin chips flowing at high velocities fold and clog in the flutes of the drill. Also, the usual galling action of titanium, accentuated by high cutting temperatures and pressures, causes rapid tool wear. Out-of-round holes, tapered...
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
... any burrs that might exist from drilling holes. Burrs on the surface can cause failure when high stresses are imposed on the joint. Fig. 8.13 Different types of washers. Source: Ref 8.6 , p 9.8 These screws fall into two main categories: (a) true self-tapping screws that, like a tap...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... (such as release paper) or by insufficient pressure during cure due to vacuum bag rupture or poorly fitting tool details. During assembly, improper hole drilling can cause surface splintering of the plies; even more serious are delaminations caused by unshimmed gaps during fastener installation. The...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540391
EISBN: 978-1-62708-309-6
... the fastener fit factor β. The α factor accounts for the surface condition of the fastener hole ( Table A5.1 ). The β factor accounts for the effect of fastener type and how it is fastened ( Table A5.2 ). Table A5.1 Fastener quality factor α Surface Condition α Standard drilled holes...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000167
EISBN: 978-1-62708-312-6
... hole and around the drill can contribute to loss of tool life and process efficiency. Several grades of wrought stainless steels are available in their free-machining versions. These typically contain a small amount of either sulfur or selenium. Improved machinability is attributed to two mechanisms...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870517
EISBN: 978-1-62708-314-0
.... Low-viscosity two-part epoxy adhesives are injected under low or moderate pressure, as shown in the two examples in Fig. 19.2 . If the delamination does not extend to an edge, small-diameter, flat-bottom holes 0.050 in. (1.3 mm) in diameter are drilled to a depth usually determined by pulse echo...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290279
EISBN: 978-1-62708-306-5
... development of numerous special-purpose fasteners. Some of these problems are drilling of and installation damage to the composite, delamination of the composite material around the hole and pullout of the fastener under load, differences in expansion coefficients of the composite and the fastener, galvanic...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050335
EISBN: 978-1-62708-311-9
... quench flow vs. pressure. Source: Ref 2 The hole-to-hole spacing is around two diameters, but the rows of holes may be staggered with offsets so that this can be increased. When the number of holes has been calculated, the design for drilling the holes can be planned. The previous example of 40...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780011
EISBN: 978-1-62708-268-6
... Frequency during preceding 30 days Shelf too short 156 Shelf too long 48 Hole not drilled 687 Missing paint 299 Weld porosity 435 Paint runs 382 Table 2.2 Quantity of shelf defects during the preceding 30 days, sorted by most frequently occurring to least frequently...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270168
EISBN: 978-1-62708-301-0
... over the rest of the width. The design also specifies countersinking on one side only while the actual plate was countersunk on both sides. The total length of the locking screw should be 10.5 mm. The length of the hole drilled in the disc to accommodate the screws is 6.6 mm. With this design, with a...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870537
EISBN: 978-1-62708-314-0
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2015
DOI: 10.31399/asm.tb.piht2.t55050317
EISBN: 978-1-62708-311-9
... Appendix 4, “Quench System Design,” in this Volume. Integral quench coils have the quench holes drilled through the heating face. These quench holes should not take up more than 10% of the heating face. In order to control the direction of the quenchant stream, the wall thickness of the copper must be at...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870351
EISBN: 978-1-62708-314-0
... usually require flat and parallel ends, which are best achieved using a setup on a surface grinder. All holes must be drilled with carbide drills using the parameters given in Chapter 11, “Machining and Assembly.” The adhesive used for applying end tabs must be of sufficient strength to transfer the...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550457
EISBN: 978-1-62708-307-2