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deep-hole drilling

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Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003597
EISBN: 978-1-62708-182-5
...Abstract Abstract Specific machining processes that employ electrochemical machining technology include deburring and deep-hole drilling. This article describes the principle and applications of electrochemical deburring as well as the machine tools used in the process. The system, process...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002159
EISBN: 978-1-62708-188-7
..., sapphire, beryllium oxide, and some composite materials. Softer ductile materials clog the diamond tool to the point at which it will cease cutting. The advantages of rotary ultrasonic machining are faster material removal, lower tool pressure for delicate parts, improved deep-hole drilling, less...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002135
EISBN: 978-1-62708-188-7
... are usually driven by V-belts; larger spindles have gear transmissions, and some have multiple-speed motors. Numerical control is also utilized. Drilling machines can usually be classified as follows: bench, upright, radial, gang, multiple-spindle, deep-hole, transfer, and special-purpose. Although...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002185
EISBN: 978-1-62708-188-7
... and straight-flute drills with no rake angle are sometimes used for the free-machining alloys in group 1, but a slow spiral drill with a helix angle of 10 to 22° is preferred for the deep-hole drilling of alloys in groups 1 and 2. For drilling group 3 alloys, drills with a greater helix angle (usually about 40...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002179
EISBN: 978-1-62708-188-7
... 130 120 30 6 High carbon and alloy 150 120 25 5 Gun drills, which consist of a single cutting tip and coolant holes, are effective in the deep-hole drilling of low-carbon steels. Long, continuous chips are more readily removed. Coolant hole and coolant tube drills are also effective...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002187
EISBN: 978-1-62708-188-7
...) are generally satisfactory for high-speed steel drills. One plant reports a speed of 12,000 rev/min (180 m/min, or 580 sfm) in drilling deep holes 5 mm ( 3 16 in.) in diameter, but this rate is much higher than normal. Feeds Feeds are: Diameter, mm (in.) 3 ( 1 8 ) 6 ( 1 4...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002186
EISBN: 978-1-62708-188-7
... that surfaces on the clearance angles and on all areas over which the chips pass be well polished to minimize tool buildup. This is particularly important in high-production machining operations. Drills for deep-hole drilling should also have polished flutes. A simple visual inspection often cannot detect...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003189
EISBN: 978-1-62708-199-3
... broaching External broaching Tapping Threading Gear cutting Deep hole drilling Boring Screw machining with form tools High-speed, light-feed screw machining Reaming Milling Drilling Planing and shaping Turning, single-point tools Sawing Grinding...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002184
EISBN: 978-1-62708-188-7
.... The drilling of alloy 390 can be accomplished using high-speed steel, high-helix drills with parabolic flutes at a speed of 20 m/min (70 sfm) for holes up to six times diameter in depth. Much better productivity can be achieved by using tungsten-carbide-tip, coolant-fed drills at 90 m/min (300 sfm...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002183
EISBN: 978-1-62708-188-7
..., although the machinability ratings for both alloys are similar in face milling and straddle milling, PH 15-7 Mo is approximately three times as difficult to machine as A-286 in end milling. Other marked differences are recorded for turning, for drilling and reaming the smaller-diameter holes...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006252
EISBN: 978-1-62708-169-6
... Alloy Using Deep-Hole and Incremental Centre-Hole Drilling Methods , Engineering Applications of Residual Stress , Vol 8 , Proulx T. , Ed., Springer New York , 2011 , p 67 – 74 80. Ball D.L. , The Influence of Residual Stress on the Design of Aircraft Primary Structure , J...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002188
EISBN: 978-1-62708-188-7
.... Crankshaft Drills Crankshaft drills are useful for producing deep holes. These drills have a heavy web and a helix angle slightly higher than normal; the web is thinned at the chisel point. Cutting action with drills larger than 19 mm ( 3 4 in.) in diameter will be improved by grinding several...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002165
EISBN: 978-1-62708-188-7
... is the dielectric. The drilling speeds can be as high as 25 mm/min (1 in./min). A wide variety of brass and copper electrodes are available, including those with a spiral metal core that removes the spike that normally occurs at the point of a flush hole. This spike is troublesome in deep-hole drilling. Also worth...
Series: ASM Handbook
Volume: 13A
Publisher: ASM International
Published: 01 January 2003
DOI: 10.31399/asm.hb.v13a.a0003596
EISBN: 978-1-62708-182-5
... constant during the process. This is known as machining under equilibrium conditions. Electrochemical machining principles have been used to perform a variety of machining operations ( Ref 1 ), for example, turning, drilling, deburring, wire cutting, deep-hole drilling, and grinding. Electrochemical...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006494
EISBN: 978-1-62708-207-5
... and replace broken drill bits. While drilling holes in aerospace aluminum alloys, researchers at École de Technologie Supérieure ( Ref 3 ) observed that at lower-than-recommended cutting speeds, the chip is generally continuous for different alloys. For AA 6061-T6 and AA 7075-T6 aluminum alloys, the chip...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002180
EISBN: 978-1-62708-188-7
... of stainless steels. The article describes turning, drilling, tapping, milling, broaching, reaming, and grinding operations on stainless steel. It concludes with information on some of the nontraditional machining techniques, including abrasive jet machining, abrasive waterjet machining electrochemical...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002131
EISBN: 978-1-62708-188-7
... per piece to 1.8 min (less than half, compared with the original method) and doubled tool life to 50 pieces per sharpening. Deep Holes Trepanning is often the most practical method of machining deep holes or tubes from the solid. Deep-hole Trepanning is similar to gun drilling (see the article...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002130
EISBN: 978-1-62708-188-7
... supported, holes having diameters that exceed length (or vice versa) by a factor of 50 or more have been successfully bored. Boring is sometimes used after drilling to provide drilled holes with greater dimensional accuracy or improved finish. It is more widely used, however, for finishing holes too...
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002163
EISBN: 978-1-62708-188-7
... ELECTROSTREAM DRILLING (ES) AND CAPILLARY DRILLING (CD) are electrochemical machining processes that were developed by General Electric and Rolls Royce, respectively, for drilling holes that are too deep to be drilled by electrical discharge machining and too small to be drilled by shaped tube electrolytic...
Book Chapter

By Mark Johnson
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002139
EISBN: 978-1-62708-188-7
... with either straight or spiral flutes. Many have four flutes, but for tapping metals that produce soft, stringy chips or for ease of chip removal in deep-hole tapping, three or even two flutes can be used. Spiral-Point Taps Spiral-point taps ( Fig. 4b ) have straight flutes supplemented by left-hand...