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belt drive
[mechanical engineering] The transmission of power between shafts by means of a belt connecting pulleys on the shafts.
Pronunciation: ′belt ′drīv
cross-belt drive
[design engineering] A belt drive having parallel shafts rotating in opposite directions.
Pronunciation: ′kr⊙s ′belt ′drīv
open-belt drive
[design engineering] A belt drive having both shafts parallel and rotating in the same direction.
Pronunciation: ′ō·p n ′belt ′drīv
back gearing
[mechanical engineering] The technique of using gears on machine tools to obtain an increase in the number of speed changes that can be gotten with cone belt drives.
Pronunciation: ′bak ′gir·iŋ
belt tightener
[mechanical engineering] In a belt drive, a device that takes up the slack in a belt that has become stretched and permanently lengthened.
Pronunciation: ′belt ′tīt·nr
drive
[electronics] See: excitation
[mechanical engineering] The means by which a machine is given motion or power (as in steam drive, diesel-electric drive), or by which power is transferred from one part of a machine to another (as in gear drive, belt drive).
[mining engineering] To excavate in a horizontal or inclined plane.
A horizontal underground tunnel along or parallel to a lode, vein, or ore body.
[psychology] A strong impetus to behavior or active striving.
Pronunciation: drīv
flat-belt pulley
[design engineering] A smooth, flat-faced pulley made of cast iron, fabricated steel, wood, and paper and used with a flat-belt drive.
Pronunciation: ′flat ′belt ′pʊl·ē
head-pulley-drive conveyor
[mechanical engineering] A conveyor having the belt driven by the head pulley without a snub pulley.
Pronunciation: ′hed ′pʊl·ē ¦drīv kn′vā·r
helve hammer
[metallurgy] A belt-driven trip hammer with the hammer face or swage carried on the end of a beam; used for welding, forging, plating, drawing, and other metal-working operations.
Pronunciation: ′helv ′ham·r
loose pulley
[mechanical engineering] In belt-driven machinery, a pulley which turns freely on a shaft so that the belt can be shifted from the driving pulley to the loose pulley, thereby causing the machine to stop.
Pronunciation: ′lüs ′pʊl·ē
quarter-turn drive
[mechanical engineering] A belt drive connecting pulleys whose axes are at right angles.
Pronunciation: ′kw⊙rd·r ′trn ′drīv
rope drive
[mechanical engineering] A system of ropes running in grooved pulleys or sheaves to transmit power over distances too great for belt drives.
Pronunciation: ′rōp ′drīv
strap hammer
[mechanical engineering] A heavy hammer controlled and operated by a belt drive in which the head is slung from a strap, usually of leather.
Pronunciation: ′strap ′ham·r
timing belt
[design engineering] A power transmission belt with evenly spaced teeth on the bottom side which mesh with grooves cut on the periphery of the pulley to produce a positive, no-slip, constant-speed drive. Also known as cogged belt; synchronous belt.
[mechanical engineering] A positive drive belt that has axial cogs molded on the underside of the belt which fit into grooves on the pulley; prevents slip, and makes accurate timing possible; combines the advantages of belt drives with those of chains and gears. Also known as positive drive belt.
Pronunciation: ′tīm·iŋ ′belt
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