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. This allows control of backlash.
At the worm wheel, the different modules result in different addendum modification coefficients and rolling circle diameters at both flanks. Because of this the profiles are different at the front and at the rear flank. The thickness of each tooth and the tooth gaps remain constant at the circumference of the wheel.
Backlash adjustment is done by shifting the worm axially, so that the section of the worm with the needed tooth thickness will be in contact with the wheel, giving the desired backlash (fig. 1).
This way, backlash can be easily adjusted to any desired value when mounting the gear, and even worn gears can be readjusted at any time delicately and continuously, without modifying the tooth contact or creating meshing interference.
A duplexworm or dual lead worm is a worm gear set where the two flanks are manufactured with slightly different modules and/or diameter quotients. As...
rotary tables are positioned using high-precision duplexworm drives with adjustable backlash. Worm drives are used on many lift/elevator and escalator...
worm (handwheel), with the worm wheel portion being made part of the actual table. High precision tables are driven by backlash compensating duplex worms...
Protocol (TCP) and the User Datagram Protocol (UDP) only need one port for duplex, bidirectional traffic. They usually use port numbers that match the services...
describe the Nematoda. His second, the "Synopsis cui accedunt mantissima duplex et indices locupletissima" was the first work to detail the life cycle of...
Laureates". Breslauer KJ, Frank R, Blöcker H, Marky LA (1986). "Predicting DNA duplex stability from the base sequence". PNAS. 83 (11): 3746–3750. Bibcode:1986PNAS...
mechanisms: canonical duplex unwinding and local strand separation. Canonical duplex unwinding is the stepwise directional separation of a duplex strand, as described...
of the aluminium water manifold on the head. The dynamo is driven by a Duplex chain with the distributor mounted at the rear end of the dynamo. A top...
front truck was fitted with twin duplex wheels (four tyres), the inner wheels equipped with pneumatic drum brakes. The duplex wheels rode on swinging wishbone...
many other animals and in some it exists as two separate uteri known as a duplex uterus. Vaccine – is a biological preparation that provides active acquired...
species also consume small arthropods (such as the camphor scale Pseudaonidia duplex, a scale insect).[citation needed] One bagworm species was found to eat...
to see ultraviolet wavelengths. The lepidosaurs appears to have lost the duplex retina and only has a single class of receptor that is cone-like or rod-like...
FDC—Floppy-Disk Controller FDS—Fedora Directory Server FDD—Frequency-Division Duplexing FDD—Floppy Disk Drive FDDI—Fiber Distributed Data Interface FDM—Frequency-Division...
Ototyphlonemertes is a genus of worms belonging to the family Ototyphlonemertidae. The distribution of members of this genus includes Eurasia. Ototyphlonemertes...
credited this story with his inspiration for a full duplex cordless telephone. Sweigert studied how duplexes reduced frustrations dealing with technologies...
in the 3'-endo (North) conformation, which is often found in the A-form duplexes. This structure provides for increased stability against enzymatic degradation...
sun dial, Eichstätt. Jean Dutertre (1684–1734), French watchmaker, Paris, duplex escapement. Johannes Klein (1684–1762), Czech mathematician, astronomer...
Included in that plan were the millionaire commission from the Arabs, the duplex in the Swiss Alps, and the luxury apartment in the exclusive London neighborhood...
meaning "two-sided" for two-headed coin ("doble" is double in Spanish < latin duplex). El Dorado from El Dorado, literally, "the golden one" El Niño from El...
Fourmont, Étienne (1742). Linguæ Sinarum Mandarinicæ Hieroglyphicæ Grammatica Duplex [Bilingual Grammar of the Mandarin Chinese Hieroglyphics] (in Latin). Paris:...
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