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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
... Abstract Tapping is a machining process for producing internal threads. This article provides a discussion on machines and accessories of tapping. It reviews the seven categories of taps, namely, solid, shell, sectional, expansion, inserted-chaser, adjustable, and collapsible taps, as well...
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Published: 30 November 2018
Fig. 26 Self-tapping and self-drilling screws. (a) Stainless steel self-tapping screw. (b) 7075-T6 aluminum thread-forming screw into plastic. (c) Thread forming into cast aluminum blind hole with steel ALtracs screw. (d) Thread forming into cast aluminum with steel Taptite 2000 screw. (e
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Published: 30 September 2015
Fig. 12 Influence of carbon/MnS addition for the moment during tapping. M5 straight flute tap with 7.2 mm (0.28 in.) tap length. Bottom hole was used in the initial investigation.
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Published: 09 June 2014
Fig. 11 Tapping a 13.5 ton induction crucible furnace in a ladle for magnesium treatment and extracting fumes through the furnace hood
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Published: 09 June 2014
Fig. 43 Melt temperatures in the transport ladle before tapping and in the pouring basin over a production time of 4 h at 7.2 tons/h pouring output. Source: Ref 43
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in Operation of Induction Furnaces for Steel and Non-iron Materials
> Induction Heating and Heat Treatment
Published: 09 June 2014
Fig. 1 A 38 ton 16 MW/250 Hz induction crucible furnace before tapping in a steel foundry. Source: Ref 4
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in Operation of Induction Furnaces for Steel and Non-iron Materials
> Induction Heating and Heat Treatment
Published: 09 June 2014
Fig. 7 A 2.5 ton aluminum melting furnace during tapping
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in Operation of Induction Furnaces for Steel and Non-iron Materials
> Induction Heating and Heat Treatment
Published: 09 June 2014
Fig. 20 Tapping a copper sintering melt from a 30 ton 6 MW/100 Hz induction crucible furnace. Courtesy of ABP Induction Systems. Source: Ref 4
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Published: 30 September 2015
Fig. 16 Stacked sieves on a shaker with rotary and tapping action
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Published: 01 January 1989
Fig. 12 Effect of hardness on the tapping of carbon and low-alloy steel. (a) 1 4 -28 UNF through holes. (b) 1 2 -20 UNF through holes Tapping conditions (holes of both diameters) Type of machine Automatic tapping Depth of through holes, mm (in.) 32 (1
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Published: 01 January 1989
Fig. 13 Tapping of seam-welded couplings Tap details Material M1 high-speed steel Number of flutes 6 Overall length, mm (in.) 380 (15) Chamfer length, mm (in.) 27.4 (1 5 64 ) Chamfer angles (double) 10° 15′ and 4° 36′ Operating conditions Speed
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Published: 01 January 1989
Fig. 16 Effect of work metal and speed on torque in taper tapping. Data were obtained with 1 8 -27 NPT high-speed steel taps for cutting threads in 8.61 mm (0.339 in.) deep straight reamed holes to gage line. Sulfurized oil was used as cutting fluid.
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Published: 01 January 1989
Fig. 18 Effect of method of grinding top chamfer on torque for tapping workpieces of three different metals. Speed: 18 m/min (60 sfm); other conditions, same as for Fig. 15 .
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Published: 01 January 1989
Fig. 19 Effect of type of cutting fluid on torque required for tapping gray iron. Speed: 18 m/min (60 sfm); other conditions, same as for Fig. 15 .
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Published: 01 January 1989
Fig. 20 Effect of method of holding tap on torque required for tapping gray iron. Speed: 18 m/min (60 sfm); no cutting fluid; other conditions, same as for Fig. 15 .
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Published: 01 January 1989
Fig. 6 Torque transducer used to monitor in-process torque generated in tapping operations
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Published: 01 January 1989
Fig. 11 Plot of tapping force against time for three conditions: (a) normal cutting, (b) tool breakage, and (c) tool missing. See text for discussion.
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Published: 01 January 1989
Fig. 32 Progressive modification of tap design for tapping 1 4 –32 threads in stainless steel valve bonnets. (a) Original design: four-flute plug tap with conventional relief. Life: 2 holes. (b) Changed to two-flute tap with spiral point and 70% land relief. Life: 8 holes. (c) Two
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Published: 01 January 1989
Fig. 16 Untreated versus nitrided and chromium-plated taps in tapping an alloy C61000 connector sleeve (95 HRB). Tapping was done in a vertical drill press. Dimensions in figure given in inches Condition or result (a) Untreated taps Treated taps Spindle speed, rev/min 575 900
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