Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

History of Worm Gear Technology provided by Cleveland Gear Company. True conjugate action between the worm thread and gear tooth is of prime importance in worm gearing, and efforts have there fore been to improve the contact by strict adherence to closer and closer manufacturing tolerances. In this phase of the hobbing operation each rotation of the hob is accompanied by a slight feed movement tangential to the gear and has the effect of progressively creating a new series of cutting edges, by relocating them with respect to the gear. The gear tooth is therefore generated by an immense number of different cuts that result in an almost perfect contour in the finished tooth. www.clevelandgear.com /wormgearhistory.htm   (862 words)

Worm gear In this case, with a twelve tooth gear, the speed is reduced by a factor of twelve. Unlike ordinary gears, the motion is not reversible, a worm can drive a gear to reduce speed but a gear cannot drive a worm to increase it. Worm gears are a compact, efficient means of substantially decreasing speed and increasing power. www.flying-pig.co.uk /mechanisms/pages/worm.html   (98 words)

Gear Solutions Online: Features: Manufacturing Single-Envelope Worm Gears by Roger Burdick, April 2003 Worm gear sets are used to transmit power between non-parallel, non-intersecting shafts, usually having a shaft angle of 90 degrees, and consist of a worm and the mating member, referred to as a worm wheel or worm gear. Worm gear sets are generally used in applications where the speed reduction ratio is between 3:1 and 100:1, and in situations where accurate rotary indexing is required. The worm teeth may have a variety of forms, and are not standardized in the way that parallel axis gearing is, but the worm wheel must have generated teeth to produce conjugate action. www.gearsolutionsonline.com /articles/wormgears0403.html   (2628 words)

Worm Gears A worm drive consists of a large diameter worm wheel with a worm screw meshing with teeth on the periphery of the worm wheel. The worm is similar to a screw and the worm wheel is similar to a section of a nut. Worm gears are often limited not by the strength of the teeth but by the heat generated by the low efficiency. www.roymech.co.uk /Useful_Tables/Drive/Worm_Gears.html   (1747 words)

Worm Gear Winch Preventive Maintenance Worm shaft end-play is adjusted by adding or removing gaskets between the worm gear housing and the bearing container. Remove the worm shaft, worm and bearing assembly from the worm housing by rotating the shaft until the worm thread is disengaged from the worm gear teeth. Insert the worm shaft into the opposite side of the worm housing and rotate the shaft to screw the worm thread into engagement with the worm gear. www.paccarwinch.com /service/wormprevent.asp   (3248 words)

Worm gear elevator drive and assembly method - Patent 4924721 The output shaft is in the horizontal plane, and an elevator rope sheave 10 is attached to this shaft 22. The worm engages the gear wheel and is rotated to thread it down into a thrust bearing on the bottom of the case. A ball or roller bearing on the worm is held in place by a retainer or collar that is tightened (bolted) to the case from the top of the case with the motor removed. www.freepatentsonline.com /4924721.html   (2430 words)

Worm gear - Wikipedia, the free encyclopedia Unlike ordinary gear trains, the direction of transmission (input shaft vs output shaft) is not reversible, due to the greater friction involved between the worm and worm-wheel, when a single start (one spiral) worm is used. Whether a worm and gear will be self-locking depends on a function of the lead angle, the pressure angle, and the coeeficient of friction; however it is approximately correct to say that a worm and gear will be self-locking if the tangent of the lead angle is less than the coefficient of friction. The worm gear is not as efficient as a hypoid gear, and such trucks invariably have a very large differential housing, with a correspondingly large volume of gear oil, to absorb and dissipate the heat created. en.wikipedia.org /wiki/Worm_gear   (740 words)

Making Wormgears Worm gears and worm wheels are the system of choice for producing the highest amount of motor speed reduction in a single step. For gear blanks that are larger than the lathe chuck's capacity it is my habit to lay out a smaller three or four-hole bolt circle on the blank that is concentric with the center hole, to which a metal ring of a size within the chuck's capacity is screwed. If this were an actual gear blank, and we were using say, a 3/8 inch tap to cut the teeth, on the high side the tap would break itself trying to worm its way into 1/4 inch of metal, and on the low side the teeth would never even engage the blank. www.atmsite.org /contrib/JSAPP/wormgear/wormgear.html   (4258 words)

Manufacturer of Industrial right angle gears, Worm Shaft and Worm Gears, Worm wheel sets. Worm shafts like for Worm Gear Boxes (most of the makes) of C.D. 50, 60, 75, 85, 100 mm, Ratio 30:1 or 40:1 are usually available Ex-Stock (Subject to conformation). Worm Gears available on very tight delivery schedules, some Worm Wheel and Worm shafts Pairs like for Worm Gear Boxes (most of the makes) of C.D. 50, 60, 75, 85, 100 mm, Ratio 30:1 or 40:1 are usually available Ready-Stock. The size of the worm gear set is generally based on the centre distance between the worm and the worm wheel. www.agroengineers.com /worm-shaft-worm-gears.shtml   (464 words)

Howstuffworks "How Gears Work" Many worm gears have an interesting property that no other gear set has: the worm can easily turn the gear, but the gear cannot turn the worm. This is because the angle on the worm is so shallow that when the gear tries to spin it, the friction between the gear and the worm holds the worm in place. One other very interesting usage of worm gears is in the Torsen differential, which is used on some high-performance cars and trucks. science.howstuffworks.com /gear5.htm   (168 words)

Gear - Wikipedia, the free encyclopedia Gears of differing size are often used in pairs for a mechanical advantage, allowing the torque of the driving gear to produce a larger torque in the driven gear at lower speed, or a smaller torque at higher speed. A disadvantage of helical gears is a resultant thrust along the axis of the gear, which needs to be accommodated by appropriate thrust bearings, and a greater degree of sliding friction between the meshing teeth, often addressed with specific additives in the lubricant. This is a gear that resembles a screw, with parallel helical teeth, and mates with a normal spur gear. en.wikipedia.org /wiki/Gear   (1270 words)

Worm Gear Winch Service - Basic Operation Worm gear winch clutches may disengage and drop or lose control of a load if they are not fully engaged at the beginning of a lift or pull. For this reason, we recommend that a worm gear should not be replaced without also replacing the steel worm. A proper "break-in" of a new winch or a repaired winch with a new worm gear set, is needed to produce a gear wear pattern which will maximize component life. www.paccarwinch.com /service/wormoperation.asp   (2022 words)

Howstuffworks "How Gears Work" It is common for worm gears to have reductions of 20:1, and even up to 300:1 or greater. This is because the angle on the worm is so shallow that when the gear tries to spin it, the friction between the gear and the worm holds the worm in place. One other very interesting usage of worm gears is in the Torsen differential, which is used on some high-performance cars and trucks. auto.howstuffworks.com /gear5.htm   (312 words)

Worm Gear Lubricant The two members of a worm gear set are known as the worm and the worm wheel, or gear. In some situations the worm shaft is positioned under the gear and it is the anti-friction bearing, used on the worm shaft, to take end thrust, which is the real problem in this type of gear set. When the worm shaft is positioned under the worm wheel, some companies recommend worm gear oils that are very light weight (to lubricate the bearings), but the light oil allows excessive metal to metal contact of worm shaft and worm wheel. www.texasrefinery.com /lb-wormgearlubricant.htm   (708 words)

Power transmission gears drives manufacturing best web site.   (Site not responding. Last check: 2007-10-20) Transmission error is normally very small and the gear set is very quiet even with incorrect contact because of a large number of the teeth participate in the contact in the same time. Gear cutting ratio has to be the same as the gear set ratio so it is impossible to have a hunting ratio for cutting if the gear set does not have it. Using oversized gear and pinion as electrodes do not solve the problem because it is impossible to cut the gear that is oversized in the same directions those plastic shrinks. www.stepanlunin.com /Worm_face_T.html   (1582 words)

worm gear reducers - Motor Specialy Inc. Greater horsepower ratings are available for intermittent duty applications if the duty cycle is such that on and off periods allow the worm gear reducers to stay within the temperature rise limit of the insulation system. Most of our product models can be modified for spur or worm gear reducers. Your spur or worm gear reducers and our motor design capabilities will meet your needs. www.motorspecialty.com /wormgearreducers.htm   (85 words)

Moore Machine & Gear, Inc. Manufacturer of Custom Gears Evansville IN Spur Gear has teeth on the outside of a cylinder and the teeth are parallel to the axis of the cylinder. The internal gear eliminates the use of an idler gear when it is necessary to have two parallel shafts rotate in the same direction. Worm Gearing - The most basic form of worm is a straight cylindrical worm in mesh with a simple helical gear. moorecustomgear.com /type.html   (716 words)

Worm Gear Speed Reducers feature all metal construction., Stock Drive ProductsSterl Worm gears are phosphor bronze, while hardened worm is steel, and housings are aluminum alloy with fl anodized finish. A total of 54 worm gear types are stocked in inch type and 29 worm gear types are stocked in metric type. The worm gears are made of phosphor bronze and the hardened worm is steel. news.thomasnet.com /fullstory/494551   (800 words)

Delroyd® Worm Gear Because of their unique worm and gear design, Delroyd® worm gear sets operate with multiple tooth contact at all times. The centrifugally cast phosphor or aluminum bronze gear mates with a hardened, ground and polished steel worm. As the drive operates, the bronze gear conforms and work-hardens to the contour of the worm. www.delroyd.com /products/worm_gear_mixer_drives.html   (431 words)

Worm and Worm Gears by CMG, a Gear Manufacturer Typically, worm and worm gears are used to gain a large reduction of speed between driving and driven shafts in a relatively compact area. The tooth geometry for the worm gear comes from the worm and typically it is the least damaged in a reverse engineering situation. CMG has many worm hobs in its inventory and can typically avoid tool up charges, however when trying to replace a worn gear set, this can often times be an issue. www.cmgear.com /types_of_gears/worm_and_worm_gears/default.html   (303 words)

Howstuffworks "How Gear Ratios Work" In a worm gear, a threaded shaft engages the teeth on a gear. The size of the red gear is not important because it is just there to reverse the direction of rotation so that the blue and yellow gears turn the same way. This is because the planet carrier circled the sun gear once in the same direction as it was spinning, subtracting one revolution from the sun gear. www.howstuffworks.com /gear-ratio4.htm   (602 words)

BJ-Gear A/S: Design of Worm Gear A worm gear is a special toothed wheel gear with the shafts at right angles to each other. a screw with one or several threads and a worm wheel, i.e. A worm gear is for instance used in cases where the number of revolutions has to be strongly reduced and where the compactness and/or the right angle between input and output is an advantage. www.bj-gear.dk /Default.asp?ID=113   (75 words)

Fabricating Worm Gears Using the Taig Lathe and CNC Mill The basic idea is to mount the gear blank on a standoff on the cross slide of the lathe so that it can rotate freely; then to cut the teeth using a threading tap held in the chuck of the lathe. Once the teeth were cut to depth, I took the gear off of the cross feed, chucked the gear into the lathe and removed (by turning) the original gashing holes. When I finish building the rotary stage, I will lap in the worm and gear with some valve lapping compound to smooth out any minor rough spots (none are visually apparent). webpages.charter.net /mbonfire/wormgear.htm   (806 words)

Worm Gear Reducers   (Site not responding. Last check: 2007-10-20) Providing Worm Gear sizes ranging from 1" to 13 3/4" center distance, IPTS is the answer to all of your speed reduction needs. Single reduction units are made with a high tensile strength cast bronze worm wheel and a hardened and ground alloy steel worm, integrated with the shaft to assure a long and trouble-free life. High tensile strength cast bronze worm wheel and a hardened and ground alloy steel worm made integral with the shaft for long and trouble-free life. www.iptsinc.com /wormgear.htm   (173 words)

WORM GEAR STEERING FOR THE MODEL T The sector gear cover was held with three screws which were locked with a retaining wire as shown. Note that there are no gears in the top case; the steering shaft (T-500B) is solid from the steering wheel to the worm gear assembly on the frame. The steering column and gear case under the steering wheel are the same as the standard units. mtfca.com /encyclo/worm.htm   (827 words)

worm gears, worm gear manufacturer, Atlas Gear We manufacture worm gears from all types of materials, bronze, plastics, stainless steels, ductile irons, cast irons and alloy steels, for all types of applications. Another way that we're able to make the highest quality worm and worm gear sets is the testing we're able to do that others can't. We have an Illinois Model 2324 Worm Gear test machine, that enables us to match the worm and gear in the same way it will be mounted in your gear box. www.atlasgear.com /12.htm   (204 words)

BOSTON GEAR: Worms and worm gears Boston Gear's worms and worm gears provide an effective answer for power transmission applications requiring high-ratio speed reduction in a limited space using right angle (90°), non-intersecting shafts. Because the efficiency of a worm gear drive depends on the lead angle and number of starts on the worm - and because increased efficiency is always a goal, the ratio should be kept as low as possible. To run properly, worms and worm gears used together must have the same diametral pitch and threads. www.bostongear.com /products/open/worms.html   (167 words)

Planetary Gear Units,Worm Gear Units,Manufacturers,Planetary Gear Units Suppliers The gear and shafts are made of alloy steels suitably heat treated. The gear units are machined in a CNC machining center to achieve excellent cordinates and size accuracies. The Gear Units may be a large unit or a small unit weighing less than 1 kg. www.gears-reducers.com /gear-units.html   (200 words)

Worm Gear Winches Gear Products’ worm gear swing drives are designed for applications requiring a low profile right angle drive capable of absorbing heavy shocks and side loads while providing exact position control. Gear Products, Inc. is the only North American manufacturer who provides both the slewing ring bearings and the swing drive components. Worm gear swing drives are uniquely engineered for precise rotational system positioning needs. www.gearproducts.com /wormgear.htm   (112 words)

Tamiya 72004 Worm-Gear Gearbox The primary feature of this high-efficiency gear box is a worm gear, which locks the output shaft whenever the motor isn't turning. The high gear ratios of 216:1 or 336:1 make this gearbox appropriate for small walking robots, lifting mechanisms, and other applications where high torque is desired. The low-voltage motor in the worm-gear gearbox runs on 3-6 volts and draws up to a few amps, making it a perfect candidate for the Pololu low-voltage dual serial motor controller. www.pololu.com /products/tamiya/0073   (172 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.