TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

COARSE PITCH [15 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2005-10-26

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series :coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch-diameter thread in the UNC series has 20 threads/in., while in the UNF it has 28... The extrafine thread series(UNEF and NEF) is used principally in aeronautical structures where an extremely shallow thread is needed for thin-walled material and where a maximum practicable number of threads is required for a given length.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
OBS

Série à filets surfins. Largement utilisée dans l'assemblage d'équipement et d'instruments en aéronautique pour le taraudage de pièces minces, de tubes, de viroles, de brides et de plateaux d'accouplement, de douilles, etc, et lorsqu'il importe d'avoir un nombre maximal de filets sur une longueur requise.

OBS

«UNEF» = Unified extra-fine thread («pas extra-fin»).

OBS

extrafin : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004).

Spanish

Save record 1

Record 2 2005-10-26

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series :coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch.-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28.... The extrafine thread series(UNEF and NEF) is used principally in aeronautical structures where an extremely shallow thread is needed for thin-walled material and where a maximum practicable number of threads is required for a given length.

OBS

See also "8N", "8UN", "12N", "12UN", and "16N", "16UN", which concern the 8-, 12- and 16-thread series.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Norme BS 1580 : 1953 «Unified Screw Threads». Il s'agit des filetages cylindriques de mécanique générale, au profil ISO, mais avec les cotes en pouces. Depuis 1949, le Royaume-Uni, le Canada et les États-Unis se sont mis d'accord sur ces filetages et leur désignation : «UNC» pour «Unified coarse thread» (gros pas); «UNF» pour «Unified fine thread» (pas fin) : «UNEF» pour «Unified extra-fine» (pas extra fin); «UN» pour «Unified constant pitch» (pas constant). Ces filetages figurent [...] d'une manière plus complète dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

OBS

extrafin : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2004).

Spanish

Save record 2

Record 3 1999-01-08

English

Subject field(s)
  • Agricultural Engineering
  • Drainage and Irrigation (Agric.)
DEF

Unsocketed, earthenware, porous concrete, perforated plastics or pitch fibre pipes,... laid end to end unjointed so as to drain the ground. The trench is usually backfilled with coarse sand or gravel rather than clay next the drain so as to prevent blockage.

CONT

Modern drainage systems may be divided into two categories, surface and subsurface. The typical surface system consists of field drains, field ditches, a main collection ditch, and an outlet. As the term implies, a surface system is designed to remove water that collects on top of the soil.

Key term(s)
  • land pipe
  • field drain pipe

French

Domaine(s)
  • Génie agricole
  • Drainage et irrigation (Agriculture)
DEF

Conduit souterrain, constitué de tuyaux en terre cuite ou en plastique perforé, pour collecter et évacuer l'eau en excès dans le sol [...]

Spanish

Campo(s) temático(s)
  • Ingeniería agrícola
  • Drenaje y riego (Agricultura)
Save record 3

Record 4 1998-06-09

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Aeronautical Engineering and Maintenance
CONT

The unified thread form accompanied by the unified thread standards has in the past fulfilled the necessary requirements for interchangeability of threaded products between the United States, Great Britain, and Canada. This modified thread form represented two compromises between British Whitworth and United Stated National thread forms. The British accepted the 60° thread angle of the American thread, and the Americans accepted a rounded root and crest similar to the Whitworth form. The United States National unified form for external threads has a rounded root and may have either a rounded or flat crest. The unified thread contours provide advantages over both the earlier forms .... The unified thread is a general-purpose thread that is particularly suited for fasteners.

CONT

Unified and American National screw thread standards... consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series; coarse(UNC), fine(UNF), and extrafine(UNEF).

OBS

Under the unified system, threads are specified by giving in order the nominal diameter, number of threads per inch, the initial letters such as UNC or UNF that identify the series, and class of thread (IA, 2A, and 3A or 1B, 2B and 3B). ... the specification for a left-hand thread must have the letters LH included.

OBS

See also "8UN", "12UN", and "16UN", which designate the 8-, 12-, and 16-thread series.

CONT

[Example of a thread identification by standardized symbols]:1/2-13UNC-2ALH.

OBS

unified thread: term standardized by ISO.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Aérotechnique et maintenance
CONT

Depuis 1949, le Royaume-Uni, le Canada et les Etats-Unis se sont mis d'accord sur ces filetages et leur désignation : «UNC» pour "Unified coarse thread [...] «UNF» pour «Unified fine thread» [...] «UNEF» pour «Unified extra-fine» [...] «UN» pour «Unified constant pitch» [...] Ces filetages figurent [...] dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

CONT

Le filetage «Unified National» comprend les séries à filets gros et les séries à filets fins.

OBS

filetage en inches à profil UNJ : terme normalisé par l'ISO.

Spanish

Save record 4

Record 5 1994-05-30

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Aeronautical Engineering and Maintenance
OBS

coarse pitch thread : Term standardized by ISO.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Aérotechnique et maintenance
OBS

filetage à pas gros : Terme normalisé par l'ISO.

Spanish

Save record 5

Record 6 1994-05-20

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Aeronautical Engineering and Maintenance
OBS

coarse pitch : term standardized by ISO.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Aérotechnique et maintenance
OBS

pas gros : terme normalisé par l'ISO.

Spanish

Save record 6

Record 7 1993-11-03

English

Subject field(s)
  • Sewers and Drainage
  • Drainage and Irrigation (Agric.)
DEF

Unsocketed, earthenware, porous concrete, perforated plastics or pitch fibre pipes, about 8 cm bore, laid end to end unjointed so as to drain the ground. The trench is usually backfilled with coarse sand or gravel rather than clay next the drain so as to prevent blockage.

OBS

drain tile: not to be confused with "tile drain" (see record).

French

Domaine(s)
  • Égouts et drainage
  • Drainage et irrigation (Agriculture)
DEF

Canalisation souterraine qui permet la pénétration et l'évacuation de l'eau en excès dans le sol.

DEF

Canalisation perméable utilisée pour recueillir et évacuer l'eau contenue dans le sol.

CONT

Aujourd'hui, on utilise essentiellement deux types de drains : les drains en terre cuite, qui sont composés de cylindres mis bout à bout (l'eau pénètre par les interstices qui séparent deux cylindres consécutifs); les drains en matière plastique, qui sont constitués, selon leur longueur et leur diamètre, d'un seul ou de plusieurs tronçons de tuyaux plastiques ajourés sur toute leur longueur (...)

CONT

Les fabricants offrent sur le marché des drains en poterie, des drains en plastique ou des drains en ciment poreux.

OBS

Terme et définition normalisés par l'ISO.

Spanish

Save record 7

Record 8 1993-08-24

English

Subject field(s)
  • Optical Glass
CONT

It is customary to process optical elements in multiples by fastening or blocking a suitable number on a common support.

OBS

Lens surfaces are ground on an iron tool, either flat or suitably curved, using progressively finer grades of wet emery or carborundum powder as abrasives. A number of fine-ground lens blanks are then mounted with pitch on a block... so that they can be polished together. The polishing tool is covered with a thin layer of pitch, wax, or even coarse cloth. Wet rouge or certain other mineral oxides are used as polishing materials.

French

Domaine(s)
  • Verres d'optique
DEF

(Polir une lentille) à l'aide d'une pâte abrasive.

CONT

Pour fabriquer une lentille ou un objectif, on passe par différentes phases : d'abord l"ébauche" qui consiste à donner sa forme à la pièce au dixième de millimètre près à l'aide d'un "tour à ébaucher"; puis on "blante" la pièce, posant sur toute sa surface un "ciment" de la consistance de la pâte à modeler.

Spanish

Save record 8

Record 9 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
OBS

ISO metric thread series are selections of diameter-pitch combinations that are distinguished from each other by the different pitch applied to a specific diameter(MI0 X 1. 5 coarse series or MI0 X 1. 25 fine series).

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Filetages profil ISO (filetages métriques à filet triangulaire, remplaçant le profil SI) suivant normes NF E03-001 ET 013 [...]. La norme NF E03-03 constitue une vue d'ensemble des filetages métriques à filet triangulaire [...] conformes aux recommandations de l'ISO. Il appartient à chaque branche d'industrie de choisir, par sélection, dans les filetages de cette norme, les séries pas-diamètres qui lui sont nécessaires.

Spanish

Save record 9

Record 10 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series :coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28. In the Unified and American National standards, the coarse thread series(UNC and NC) is recommended for general industrial use on threaded machine parts and for screws and bolts. Because a coarse thread has fewer threads per inch than a fine thread of the same diameter, the helix angle is greater, and the thread travels farther in one turn. A coarse thread is preferred when rapidity and ease of assembly are desired, and where strength and clamping power are not of prime importance.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
OBS

Série à filets gros : Pour pièces et équipement ordinaires dans l'industrie et le commerce.

OBS

"UNC"="Unified coarse thread" (gros pas).

Spanish

Save record 10

Record 11 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series :coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch.-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28. In the unified and American National standards, the coarse thread series(UNC and NC) is recommended for general industrial use on threaded machine parts and for screws and bolts. Because a coarse thread has fewer threads per inch than a fine thread of the same diameter, the helix angle is greater, and the thread travels farther in one turn. A coarse thread is preferred when rapidity and ease of assembly are desired, and where strength and clamping power are not of prime importance.

CONT

Threads are designated by standardized notes. Under the unified system, threads are specified by giving in order the nominal diameter, number of threads per inch, the initial letters such as UNC or UNF that identify the series, and class of thread (1A, 2A, and 3A or 1B, 2B and 3B). Threads are considered to be right-hand and single unless otherwise noted; therefore the specification for a left-hand thread must have the letters LH included.

CONT

[Example of a thread identification by standardized symbols]: 1/2-13UNC-2ALH.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Norme BS 1580 : 1953 "Unified Screw Threads". Il s'agit des filetages cylindriques de mécanique générale, au profil ISO, mais avec les cotes en pouces. Depuis 1949, le Royaume-Uni, le Canada et les États-Unis se sont mis d'accord sur ces filetages et leur désignation : "UNC" pour "Unified coarse thread" (gros pas)"; "UNF" pour "Unified fine thread"(pas fin); "UNEF" pour "Unified extra-fine thread" (pas extra-fin); "UN" pour "Unified constant pitch" (pas constant). Ces filetages figurent [...] d'une manière plus complète dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

Spanish

Save record 11

Record 12 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
  • Machine-Tooling (Metallurgy)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general the unified screw threads are limited to three series :coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28... The fine thread series(UNF and NF) is recommended for general use in the automotive and air craft fields for threads subject to strong vibration. In general, a fine thread should be used only where close adjustment, extra strength, or increased resistance to loosening is a factor.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
  • Usinage (Métallurgie)
OBS

Série à filets fins. Pour pièces et équipement où l'emploi des filets fins est plus avantageux. Ce filetage offre une plus grande résistance à la traction et à la torsion, tout en étant moins sujet au déboulonnage sous l'effet des vibrations.

OBS

"UNF"="Unified fine thread" (pas fin).

Spanish

Save record 12

Record 13 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads and a selection of special threads that cover nonstandard combinations of diameter and pitch. In general, the unified screw threads are limited to three series :coarse(UNC), fine(UNF), and extrafine(UNEF). A 1/4-inch.-diameter thread in the UNC series has 20 threads/in., while in the UNF series it has 28.... The fine thread series(UNF and NF) is recommended for general use in the automotive and air craft fields for threads subject to strong vibration. In general, a fine thread should be used only where close adjustment, extra strength, or increased resistance to loosening is a factor.

CONT

Threads are designated by standardized notes. Under the unified system, threads are specified by giving in order the nominal diameter, number of threads per inch, the initial letters such as UNC or UNF that identify the series, and class of thread (1A, 2A, and 3A or 1B, 2B, and 3B). Threads are considered to be right-hand and single unless otherwise noted; therefore the specification for a left-hand thread must have the letters LH included.

CONT

[Example of a thread identification by standardized symbols]: 1/2-13UNC-2ALH.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

Norme BS 1580 : 1953 "Unified Screw Threads". Il s'agit des filetages cylindriques de mécanique générale, au profil ISO, mais avec les cotes en pouces. Depuis 1949, le Royaume-Uni, le Canada et les États-Unis se sont mis d'accord sur ces filetages et leur désignation : "UNC" pour "Unified coarse thread" (gros pas). "UNF" pour "Unified fine thread" (pas fin). "UNEF" pour "Unified extra-fine thread" (pas extra-fin). "UN" pour "Unified constant pitch" (pas constant). Ces filetages figurent [...] d'une manière plus complète dans la norme américaine ASA B1.1-1960 qui concerne les filetages unifiés.

Spanish

Save record 13

Record 14 1988-12-22

English

Subject field(s)
  • Joining Elements (Mechanical Components)
CONT

Unified and American National screw thread standards for screws, bolts, nuts, and other threaded parts consist of six series of threads [UNC or NC; UNF or NF; UNEF or NEF; 8UN or 8N; 12UN or 12N; 16UN or 16N] and a selection of special threads that cover nonstandard combinations of diameter and pitch... The 8-thread series(8N) with 8 threads/in. for all diameters is used on bolts for high-pressure flanges, cylinder-head studs, and other fasteners against pressure, where it is required that an initial tension be set up so that the joint will not open when steam or other pressure is applied. This series has come into general use for many types of engineering work. It is sometimes used as a substitute for the coarse thread series for diameters greater then 1 in.

OBS

"8N": for the American National thread. "8UN": for the Unified National thread.

French

Domaine(s)
  • Éléments d'assemblage (Composants mécaniques)
CONT

[...] un filetage Unified National à filets gros de 1 po de diamètre et de 8 filets au po, se cote : 1-8 UNC [...]

CONT

L'utilisation type des diverses séries est la suivante : [...]. Série à 8 filets. Boulons de serrage pour brides de canalisations sous pression élevée. Goujons pour culasses de moteurs [...]. Cette série remplace la série à filets gros sur les pièces de visserie de plus grandes dimensions.

OBS

Abréviation "8 N" pour le filetage American National et "8 UN" pour le filetage Unified National.

Spanish

Save record 14

Record 15 1987-08-06

English

Subject field(s)
  • Aircraft Propulsion Systems
CONT

Automatically controlled two-bladed propeller.... Designated the Variostat HO-V62A, it is designed for engines up to 100HP... It is automatically protected against overspeed in all flight conditions and maintains constant speed from take-off onwards. All adjustments within the variable-pitch range can be made without the use of a control lever or selector in the cockpit. The pitch change mechanism has its own oil system.... Four adjustments are possible on the ground : fine pitch, coarse pitch, maximum rpm and rpm for reversion to fine pitch.

French

Domaine(s)
  • Propulsion des aéronefs

Spanish

Save record 15

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