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 ?
The 2 ministers likewise broached provincial and international challenges of common interest, notably the battle against terrorism in Africa and the world and also the Malian and Libyan problems.
Summary: Foreign Minister Mourad Medelci met Saturday in Algiers the president of the Council of Europe Parliamentary Assembly, Luis Maria De Puig, with whom he broached bilateral cooperation issues.
Longmuir confirmed the subject had been broached but was at pains to stress the informal nature of the discussion.
At that point, Hart broached the possibility of playing the games back-to-back.
Martin has seen students who have never even broached the subject of financial planning.
3 percent in 2004, but talk of overcapacity in China is being broached.
This isn't the first time that T-Mobile has broached sexual orientation or gender identity.
Steering racks are typically broached or milled in quantities that might reach 15,000 racks per day.
In an article entitled, "Secrecy by Aides and Silence by Doctors Persists, and What Killed Ararat Is Still a Mystery," Elizabeth Rosenthal, a medical doctor, broached the possibility that the PLO leader, who died in a Paris hospital, may have succumbed to AIDS.
Eventually Garry Guzzo, a former judge and a member of the Provincial Parliament (MPP) for an Ottawa riding, broached the subject in the Ontario Legislature.
In these essays, Ragusa's central interests -- her commercial and political contacts, use of ports and rights of navigation vis-a-vis Venice -- are broached, but there is also discussion of the Balkan hinterland, and of the Ottoman world.
Homosexuality in the black community is a subject rarely broached.