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A worm drive is a gear arrangement in which a worm (which is a gear in the form of a screw) meshes with a worm wheel (which is similar in appearance to a spur gear). Its main purpose is to translate the motion of two perpendicular axes or to translate circular motion to linear motion (example: band type hose clamp ).The two elements are also ...
This page lists the standard US nomenclature used in the description of mechanical gear construction and function, together with definitions of the terms. The terminology was established by the American Gear Manufacturers Association (AGMA), under accreditation from the American National Standards Institute (ANSI).
The slewing drive is a modernized take on the worm drive mechanism, which dates back many centuries and was widely used during the Renaissance Era. Pappus of Alexandria (3rd century AD), a Greek mathematician, is credited with an early version of the endless screw, which would later evolve into the worm drive. [1]
fig.1. A duplex worm or dual lead worm is a worm gear set where the two flanks are manufactured with slightly different modules and/or diameter quotients. As a result of this, different lead angles on both tooth profiles are obtained, so that the tooth thickness is continuously increasing all over the worm length, while the gap between two threads is decreasing.
Gear Ratios [b] Layout Cou-pling Control 1st Top Count [c] Span [d] Step [e] Center [f] Power Flow [g] Gear-sets [h] Brakes Clutch-es 3HP 12: 20 kg⋅m (145 lb⋅ft) 1965 – 1977 Longitudinal: 2.5600 1.0000 3 2.5600 1.6000 1.6000 S 2 2 2 Torque Converter: Hydraulic 3HP 12: TBD 1965 – 1977 Longitudinal: 2.2857 1.0000 3 2.2857 1.5119 1.5119 S ...
Helical and worm handedness In helical and worm gears, the helix angle denotes the standard pitch circle unless otherwise specified. [ 1 ] Application of the helix angle typically employs a magnitude ranging from 15° to 30° for helical gears, with 45° capping the safe operation limit.