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A possible ref

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  • Moltrecht, Karl Hans (1981). "Tapping". Machine shop practice. New York City: Industrial Press. p. 367. ISBN 0-8311-1126-7. OCLC 5829600. {{cite book}}: External link in |chapterurl= (help); Unknown parameter |chapterurl= ignored (|chapter-url= suggested) (help)

Please give history in simple launguage Reeshabh (talk) 16:42, 23 November 2016 (UTC)[reply]

History

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I found this interesting book, which states that first screw threads were manufactured by hand via filing. I don't know if that's accurate, but if it is, it ought to be added to this article. http://books.google.com/books?id=sl3imKj8258C&pg=PA181 Wizard191 (talk) 16:48, 13 April 2011 (UTC)[reply]

True that whittling and filing are some of the oldest methods of cutting threads in wood and metal. This is mentioned a bit elsewhere (e.g., 3rd paragraph of Automatic lathe > History; and 2nd of Screw-cutting lathe > History), but probably the fullest coverage of it should be here in this article. Good call. — ¾-10 01:17, 14 April 2011 (UTC)[reply]

This Web page -- http://www.practicalmachinist.com/vb/antique-machinery-history/how-would-old-timers-chase-thread-wood-screw-180943/ -- states that in the 18th century, screws were threads by means of a swaging tool. The page includes two photos of the tool. It basically consists of two straight arms that are joined at one end, where they can pivot slightly. On the inner sides of the two arms are series of half-holes. (When the two arms are pressed together, the half-holes are joined to form complete, circular holes.) The arms are pressed together slightly (using a screw that squeezes them together); a piece of screw stock is inserted in the appropriately sized hole; the screw joining the arms is then tightened to increase the tool's pressure on the stock; then the tool is twisted around the stock to begin forming screw threads; the process is repeated with the pressure increased until the threads are as deep as the screw maker wishes. Cwkmail (talk) 19:18, 10 June 2014 (UTC)[reply]

manufacturing self tapping dies from milling machines.

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Dear Sir, we are intrested in manufacturing self tapping threading dies pls help to obtain technical as well as machining mannuals

manufacturing self tapping dies from milling machines.

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Dear Sir, we are intrested in manufacturing self tapping threading dies pls help to obtain technical as well as machining mannuals — Preceding unsigned comment added by 115.241.178.42 (talk) 13:23, 18 November 2011 (UTC)[reply]

History of cold rolling of screw threads

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Some sources credit Hayward Augustus Harvey (1824-1893) of Orange, N.J. with inventing, in 1880, the first successful machine for the cold rolling of screw threads:

However, in his patent of 1880, Harvey stated that his machine was an improvement of existing machines for cold rolling threads onto bolts and screws. Also, the letter to the editor in the Scientific American of 1897 (see above) mentioned that machine screws had been cold rolled for years prior to Harvey's machine. Subsequent research indicates that thread rolling machines were being patented at least as early as 1868:

I shall continue to try to discover who made the first successful thread rolling machine. Cwkmail (talk) 08:19, 10 June 2014 (UTC)[reply]

The history of the cold rolling of screw threads has become curiouser and curiouser.

An article in Fessenden's Silk Manual and Practical Farmer (Boston, Massachusetts ; May 1836), vol. 2, no. 1, page 12, states in response to the claim that William Keane of N.Y. invented, in 1836, the cold rolling of screw threads: "The machine therein spoken of, will, undoubtedly, perform all that is said of it, but as to its "excelling anything of the kind in Europe or America," that must be a great mistake. A machine has recently been invented by C. Read & Co. of Worcester, which will cut 30 gross of screws per day, with one pair of dies; … " (It's not clear that the word "cut" actually means "cold roll". It may simply mean that Read invented a fast thread-cutting machine.)

Duane H. Hurd in his History of Worcester County, Massachusetts: … (Philadelphia, Pennsylvania: J.W. Lewis & Co., 1889), vol. 2, page 1626 states that in 1831 C. Read & Co. moved from North Providence, Rhode Island to Worcester, Massachusetts and remained there until 1836/7, at which time it returned to Providence. While in Worcester, the company made screws "under a patent which they owned."

According to William G. Angell in his history of the American Screw Co. of Providence, Rhode Island — J.D. Van Slyck, New England Manufacturers and Manufactories, vol. 1 (Boston, Massachusetts: Van Slyck & Co., 1879), pages 17-18 — in 1838, Clement O. Read organized the Providence Screw Co. of Providence, Rhode Island. In the same year and in the same city, the Eagle Screw Co. was formed, which bought some screw making machines from the Providence Screw Co. Later, Jeremiah Halsey Pierson (1766-1855) of Ramapo, New York sued the Eagle Screw Co. for patent infringement and won: apparently the Reads did NOT own the patents on which their screw-making machines were based. (The patent infringement involved a machine for cutting slits in the heads of screws. See: [Anon.] (July 11, 1901) "Development of the wood screw," The Iron Trade Review, 34 (28) : 20-21 ; especially p. 20.)

So, it's possible that the Read brothers of Providence and Worcester had cold-rolling machines, and it's possible that J.H. Pierson of Ramapo, New York had such machines. (However, the machines of these men are not referred to as rolling threads.)

The List of Patents for Inventions and Designs, Issued by the United States, from 1790 to 1847, … (Washington, D.C.: J. & G.S. Gideon, 1847), page 58 lists William Keane's patent of Feb. 13, 1836 for "Screw, manufacturing", and R.C. Read and C.O. Read's patent of June 15, 1834 for "Screw, wood", and J.H. Pierson's patents of November 1836 for "Screws, cutting … ". But there's no mention of the cold rolling of screw threads.

So, the investigation into the earliest thread rolling machine continues.Cwkmail (talk) 23:25, 11 June 2014 (UTC)[reply]

The earliest (fairly) successful machine for threading wood screws via cold rolling appears to have been issued to Harvey J. Harwood of Utica, New York in 1867: Harvey J. Harwood, "Improved screw machine," U.S. Patent no. 65,567 (issued: June 11, 1867). In his patent, Harwood states:

"In the manufacture of wood-screws the thread has been formed hitherto by removing the metal between the turns of the thread by means of dies or cutters. By my invention the blank is rotated between rotating or reciprocating dies, suitably formed, and set in motion, by means of which the thread is impressedon the blank without removing any part of the metal."

Harwood (and the patent examiner) were apparently ignorant of Wm. Keane's patent of 1836, since Harwood regards his screw-making machine as unprecedented.

However, a review article in The Iron Trade Review of 1901 (see above) states that a successful screw making machine wasn't achieved until Charles D. Rogers of Providence, Rhode Island patented dies for a thread rolling machine in 1887. (It should be noted that the article in The Iron Trade Review was a condensed version of an address that had been made by Charles Rogers on the history of the wood screw.) Rogers' patent: Charles D. Rogers, "Die for rolling screw-threads," U.S. Patent no. 370,354 (filed: May 11, 1887 ; issued: Sept. 20, 1887).
Cwkmail (talk) 21:05, 12 June 2014 (UTC)[reply]

Inspection

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"Digital calipers and micrometers can send each measurement (data point) as it occurs through an interface (commonly RS-232)"

States the current article. RS-232 may have been the standard when this was written, but it no longer is. I suggest a generic, vague description would help to "future-proof" the article. AnnaComnemna (talk) 09:20, 26 September 2015 (UTC)[reply]

Implemented your advice. Deleted "(commonly RS-232)". Things are changing IT-wise, and people who want the details of that can turn to other articles. — ¾-10 01:49, 30 September 2015 (UTC)[reply]
RS-232 is still very common for this, especially on hand-held tools. I'd say it's one of the few places where RS-232 is still encountered, such that it's now more awkward to find a machine (or a USB adapter) that can connect to it on the other end. Andy Dingley (talk) 13:35, 4 October 2015 (UTC)[reply]
Related: I happened across this today: https://cybernetmanufacturing.quora.com/Optimal-Performance-in-The-Industrial-Sector-RS-232-Serial-Ports-Over-USB. It suggests to me that RS-232 is still important and superior for certain industrial contexts. I decided to have "(such as USB or RS-232)" in parentheses after "interfaces". — ¾-10 23:06, 19 November 2015 (UTC)[reply]

Regarding "gun" taps

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In another article a Kennametal employee once appeared in the Talk section with a C&D against the article for their trademark. While they complied in full, it should be fair use to simply indicate that "GUN" taps are a Kennametal (formerly Greenfield Tap & Die) trademark. BFeely (talk) 20:14, 16 September 2017 (UTC)[reply]

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