Broach

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Broach,

city, India: see BharuchBharuch
, formerly Broach,
city (1991 pop. 139,029), Gujarat state, W India, on the Gulf of Khambat. A port at the mouth of the Narmada River, Bharuch ships cotton, wheat, and timber and manufactures textiles, ink, and glass.
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Broach

A half pyramid above the corners of a square tower to provide a transition to an octagonal spire.

Broach

 

a metalcutting tool with multiple blades used on broaching machines to machine outer surfaces and through-holes. The following broaches are distinguished, based on the shape of the surface to be worked: cylinder, faceted (square, hexagonal, and so forth), spline, keyway, flat surface, and shaped surface broaches.

Figure 1. Broaches: (a) for internal broaching, (b) for external broaching; (1) pull end, (2) and (5) front and rear pilots, (3) cutting section, (4) finishing section

In broaches used for internal broaching (Figure 1, a), the teeth are arranged on a tapered cutting section; they carry out the major work of cutting the final layer of stock to size. The finishing section of the broach has from three to eight teeth. The first of these cut a very thin layer of metal and give the hole its final shape; the other teeth are spares and are used after the broach is reground. Broaches for external broaching (Figure 1, b) are manufactured in the shape of a rectangular bar and have cutting and finishing sections.

In addition to cutting broaches, there are burnishing broaches, which do not cut, but rather smooth and flatten metal. The flattened layer produced by such broaches has high resistance to wear. The teeth of burnishing broaches do not have cutting angles; they are sometimes positioned on the finishing section of the broach.

broach

[brōch]
(mechanical engineering)
A multiple-tooth, barlike cutting tool; the teeth are shaped to give a desired surface or contour, and cutting results from each tooth projecting farther than the preceding one.

broach

1. In quarrying, to free stone blocks from the ledge by cutting out the webbing between holes drilled close together in a row.
2. To finish a stone surface with broad diagonal parallel grooves cut by a pointed chisel.
3. A half pyramid above the corners of a square tower to provide a transition to an octagonal spire.
4. A spire sometimes springing from a tower without an intermediate parapet.
5. Any pointed ornamental structure.

broach

1. a long tapered toothed cutting tool for enlarging holes
2. a roof covering the corner triangle on the top of a square tower having an octagonal spire
3. a pin, forming part of some types of lock, that registers in the hollow bore of a key
4. a tool used for tapping casks
References in periodicals archive ?
He said a separate cell will be established to avoid difficulties after the auctions and broachers of auction will be also presented in understandable form.
Similarly the broachers will have more and clear information unlike previous ones.
Nadeem Hassan Asif further said that instructions and terms in the broachers will be in English as well as in Urdu.
Moreover, the CDA has failed to establish tourist information centres yet and to provide pamphlet, broachers and guides inscribed with information about the recreational places.
He urged to establish Tourism Information Centres where trained staff and free broachers should be available to facilitate the intending tourists.
materials like posters, banners, newsletters, broachers, leaflets and pictures were