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 ?
During the interviews, we broached racial and ethnic differences with each participant, which may have affected participant disclosures in positive or negative ways.
Broached flats are approximately 1/32" deep x 1" long.
The 1/16" x 1/16 " Slot must be broached within +/- 1 degree inline with an eccentric hole at the opposite end of the part.
The deep radiused slots at each end were broached in separate operations, and oriented via a hole drilled in the shaft.
But Burbank city officials are cold to the idea broached by a Burbank resident opposed to the proposed expansion deal.
It features the ``Oak of Peace,'' where the idea of a peace treaty ending the California phase of the Mexican-American War was broached.
If you're sitting in the Pyramid at Long Beach State watching the Summer Pro League and the subject of the Clippers is broached, the inquiry is obvious:
The idea of a full-time officer was first broached last year when Moorpark Rotary Club President Stephen Sill offered $10,000 toward the more than $100,000 cost of the post, said Police Chief Mike Lewis.
Del Campo said he's already broached the idea with Supervisors Frank Schillo and Kathy Long and has received support from the few restaurant owners he's spoken with.
Taking up an idea broached last month, the City Council is scheduled Wednesday to vote on a 45-day moratorium that would give it time to evaluate the amount of apartment zoned land needed to serve the city and identify any changes needed for the General Plan, the city's master plan for development.
In his State of the Union speech Tuesday, Clinton proposed using budget surpluses to ensure the retirement system can pay promised benefits, an idea he broached last year.
Valley Latino community leaders last week broached the issue of race, rarely discussed openly and honestly in a liberal, politically correct society, and whether they will lose representation and power if the Valley becomes a city.