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Worm gears

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Published: 01 January 1989
Fig. 7 Mating of worm gear (worm wheel) and worm in a double-enveloping worm gear set More
Image
Published: 01 January 2002
Fig. 4 Mating of worm gear (worm wheel) and worm in a double-enveloping worm-gear set. More
Image
Published: 30 August 2021
Fig. 9 Mating of worm gear (worm wheel) and worm in a double-enveloping worm gear set. Source: Ref 1 More
Image
Published: 01 August 2013
Fig. 10 Image of worm gear loaded into a roller-die quenching machine. After the machine guard is lowered, the flow of quench oil is initiated to uniformly quench the part as it rotates between centers. Courtesy of The Gleason Works, Rochester, NY More
Image
Published: 01 January 2002
Fig. 6 Overload failure of a bronze worm gear ( example 4 ). (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grain weld metal. Scanning electron micrograph. 119×. (c) Morphology More
Image
Published: 15 January 2021
Fig. 6 Overload failure of a bronze worm gear (Example 4). (a) An opened crack is shown with a repair weld, a remaining casting flaw, and cracking in the base metal. (b) Electron image of decohesive rupture in the fine-grained weld metal. Scanning electron micrograph. Original magnification More
Image
Published: 15 January 2021
Fig. 29 (a) Phosphor bronze worm gear with worn teeth. (b) Original shape of tooth. Ferric chloride etch. (c) Worn tooth with cold work. Ferric chloride etch. (d) Alloy steel gear with worn teeth. Original magnification: 5×. (e) Section through worn tooth with burrs. Structure change from heat More
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006820
EISBN: 978-1-62708-329-4
... Abstract This article first reviews variations within the most common types of gears, namely spur, helical, worm, and straight and spiral bevel. It then provides information on gear tooth contact and gear metallurgy. This is followed by sections describing the important points of gear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001815
EISBN: 978-1-62708-180-1
... ). The action between the mating teeth has a wedging effect, which results in sliding on tooth flanks. These gears have low load-carrying capacity, but are useful where shafts must rotate at an angle to each other. Worm-Gear Sets Worm-gear sets are usually right-angle drives consisting of a worm gear...
Image
Published: 30 August 2021
Fig. 5 Fluorescent dye penetrant indication of fissures in a carburized UNS G86200 steel worm gear after grinding, revealed under ultraviolet light. Source: Ref 8 More
Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002145
EISBN: 978-1-62708-188-7
... Abstract This article discusses the different classes of gears, namely, spur, helical, herringbone, crossed-axes helical, worm, internal, rack, bevel, or face-type. It describes the methods used to cut the teeth of gears other than bevel gears: milling, broaching, shear cutting, hobbing...
Series: ASM Handbook
Volume: 19
Publisher: ASM International
Published: 01 January 1996
DOI: 10.31399/asm.hb.v19.a0002375
EISBN: 978-1-62708-193-1
... little power is involved. Worm Gears In a single-enveloping worm gear set, in which the worm is cylindrical in shape, several teeth may be in mesh at the same time, but only one tooth at a time is fully engaged. The point (or points) of contact in this type of gear set constitutes too small...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006476
EISBN: 978-1-62708-190-0
... such as decarburization. Gears are a common part type for applications of the MBN techniques This includes spur, helical, hypoid, worm, and other gear types. Typical applications for MBN techniques include detection of grinding retemper burn, evaluation of residual stresses, and detection of heat treatment defects...
Book Chapter

Series: ASM Handbook
Volume: 14B
Publisher: ASM International
Published: 01 January 2006
DOI: 10.31399/asm.hb.v14b.a0005126
EISBN: 978-1-62708-186-3
.... Drive Systems The five basic methods used to drive roll-forming units are chain drive, spur gear drive, worm gear drive, square gearing, and universal drive. Chain Drive A chain drive consists of a sprocket attached to the individual roll-forming unit and connected to the main drive by means...
Book Chapter

Book: Machining
Series: ASM Handbook
Volume: 16
Publisher: ASM International
Published: 01 January 1989
DOI: 10.31399/asm.hb.v16.a0002141
EISBN: 978-1-62708-188-7
... heads, thread gages, worm gears, powdered iron screws, and self-threading insert bushings. Materials that can be thread ground include hardened and annealed screw stock, alloyed high-speed tool and stainless steels, and sintered iron. Sintered iron is widely used for continuously threaded screws...
Series: ASM Handbook
Volume: 4A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v04a.a0005809
EISBN: 978-1-62708-165-8
... of these highly specialized quenching machines. Fig. 10 Image of worm gear loaded into a roller-die quenching machine. After the machine guard is lowered, the flow of quench oil is initiated to uniformly quench the part as it rotates between centers. Courtesy of The Gleason Works, Rochester, NY...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006354
EISBN: 978-1-62708-192-4
... angle. Unless tooth surfaces of a surface-hardened gear are smoothly finished, they function like files if the mating gear is appreciably softer. This is why a worm pinion is polished after grinding before it is run with a bronze worm wheel. Manufacturers of computer disk drives found that stainless...
Series: ASM Handbook
Volume: 4C
Publisher: ASM International
Published: 09 June 2014
DOI: 10.31399/asm.hb.v04c.a0005867
EISBN: 978-1-62708-167-2
... hardening. External spur and helical gears, worm gears and internal gears, bevel gears, racks, and sprockets are among the parts that are typically induction hardened. Figure 1 shows a sampling of gears and gearlike components that are routinely induction hardened. Fig. 1 Sampling of gears...
Book Chapter

Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006358
EISBN: 978-1-62708-192-4
... increases. Furthermore, the wear is not generally a function of the relative sliding velocity along a tooth face; however, at very high speeds, scoring can occur, and the friction losses in gear sets are strongly affected by sliding velocity. Hypoid gears, worm gears, and spiroid gears can run relatively...
Series: ASM Handbook
Volume: 18
Publisher: ASM International
Published: 31 December 2017
DOI: 10.31399/asm.hb.v18.a0006411
EISBN: 978-1-62708-192-4
... Abstract The function of lubricants is to control friction and wear in a lubricating system containing machine elements such as gears and bearings. This article discusses the basic properties of lubricants to help scientists and engineers understand the principles behind lubricant selection...