This gearbox utilizes a 30:1 ratio worm-drive reduction for applications that require extremely slow and smooth rotational motion. The worm-drive design not only minimizes backlash but also eliminates back-driving the gearmotor so a position can be kept even when power isn’t applied. The precision floor 3/8” stainless steel output shaft is backed by dual 3/8” ABEC 5 ball bearings to aid a load from any orientation. The ¼” ABS plastic and aluminium structure offers a rigid framework without adding unnecessary weight and is easily mounted to any flat surface by utilizing the base mounting tabs. Our Regular Spur Gear motors will continue to work with this gearbox (motor sold separately). The Vertical Shaft Worm-Drive Gearbox is perfect for turn-tables, time-lapse systems and low-velocity applications that want high precision and torque.
Motor RPM required = 1 / (minutes per rotation desired / 30)
Example: 1 / (ten minutes per rotation / 30) = 3 RPM motor had a need to achieve 10 minutes per rotation (at max speed)
Dimensions 3.43″ x 1.93″
Item Weight 5.9oz (0.375 lbs)
Output Shaft Diameter 3/8″ (0.375″)
Motor Size Compatibility Regular Spur Gear Motors
Ever-Power gives you the widest selection of standard, non regular and customised worm gearbox and worm equipment motor.
Ever-Power maintains the best level of standard in production of worm gears in gearboxes. Right from the design of gearbox, material selection to production practice of worm equipment box and gear electric motor.
Models: 30, 40, 50, 60, 75, 85, 100, 125, 150, 175, 200, 250, 300, 350, 430
Ratio : 5/1 to 4900/1
Middle Distances : 40 mm to 400 mm
Single stage / Double stage
Small Worm Gearbox Models like C.D. 50, 60, 75, 85, 
100 mm and Ratio 30/1 or 40/1 are usually available in stock or could be made on brief notice by customer.
Worm gearboxes are experiencing cast iron gear case, worm shaft is of Alloy Metal, duly hardened and tempered. The worm wheel is constructed of Chill Cast Phosphorous Bronze.
Ever-Power worm equipment boxes have liberal ribbing for increasing temperature dissipation region, streamlined sump to carry more oil and fan of ample size which works well in both side of rotation.
Design Standards:
Wherever applicable, British as well as Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels conform to phosphorous-bronze according to BS 1400, While Gear case conforms to C.I. Quality 20, IS210.
High reduction gear
Worm and wheel gear pairings provide large acceleration decrease ratios with only 1 gear pairing in a far more compact space when compared with other styles of gears. We offer up to a maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel equipment pairings may be the low level noise they produce. Some disadvantages are the general low performance and the actual fact that they generate heat.
Advantage of EP’s Worm Gears – “Frosty rolled Worm Gears”
1) The hardness of the helicoid surface has been achieved by work hardening when the chilly rolling was performed, providing Worm gears with better mechanical properties than machined worms because of fact that the metallic fibrous structure has not been cut.
2) The surface hardness after cool rolling is increased by 1.2 to at least one 1.3 times in comparison to the hardness of the original materials, and the hardness of the helicoid surface area increases to around HB240 to 260.
3) Frosty rolled worms are suitable for miniature gear applications since this could be rotated smoothly without damaging the worm wheels made out of POM or various other soft materials.
4) Because of the implementation of this cold rolling technique, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes out with a mirror like complete. Thus, EP-Precision Frosty Rolled Worms provide a smooth operation and long-term durability.
Worm gears are constructed of a worm and a equipment (sometimes known as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 worm wheel gearbox degrees to one another. The worm is analogous to a screw with a V-type thread, and the gear is analogous to a spur equipment. The worm is normally the traveling component, with the worm’s thread advancing one’s teeth of the gear.
Like a ball screw, the worm in a worm gear might have a single start or multiple starts – meaning that there are multiple threads, or helicies, on the worm. For a single-start worm, each full turn (360 degrees) of the worm advances the gear by one tooth. So a gear with 24 teeth provides a gear reduced amount of 24:1. For a multi-start worm, the gear reduction equals the number of teeth on the apparatus, divided by the number of begins on the worm. (This is different from almost every other types of gears, where the gear reduction is usually a function of the diameters of both components.)
The meshing of the worm and the apparatus is an assortment of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and heat, which limits the efficiency of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, high temperature), the worm and gear are made of dissimilar metals – for example, the worm may be made of hardened metal and the gear made of bronze or aluminum.
Although the sliding contact reduces efficiency, it provides very quiet operation. (The usage of dissimilar metals for the worm and gear also contributes to quiet procedure.) This makes worm gears ideal for use where noise should be minimized, such as in elevators. In addition, the use of a softer material for the gear means that it could absorb shock loads, like those experienced in heavy equipment or crushing devices.
The primary advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They may also be utilized as rate reducers in low- to medium-swiftness applications. And, because their reduction ratio is founded on the number of gear teeth only, they are more compact than other types of gears. Like fine-pitch lead screws, worm gears are typically self-locking, which makes them well suited for hoisting and lifting applications.
Worms & Worm Gears
EP Gear’s worms and worm gears provide an effective answer for power tranny applications requiring high-ratio swiftness reduction in a restricted space using correct angle (90°), non-intersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest kind of gearing.
Because the performance of a worm gear drive depends upon the business lead angle and amount of starts on the worm – and because increased effectiveness is always an objective, the ratio should be kept only possible. To run correctly, worms and worm gears used together must have the same diametral pitch and threads.
Our complete line of worms and worm gears could be ordered through the EP Gear Guaranteed Same Day Shipment Program for the quickest delivery possible.
Product Features
90°, non-intersecting shaft applications answer highly specialized power tranny needs.
Our worm gears offer the smoothest, quietest type of gearing.
They provide high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is level of resistance to back driving.
Obtainable from 48 DP to 3 DP
Stocked as single, dual and quad start configurations
How to Select High Efficient Worm Gearbox?
The worm gear production process can be relatively simple. However, there exists a low transmission performance problem if you don’t know the how to select the worm gearbox. 3 basic indicate choose high worm equipment efficiency that you ought to know:
1) Helix angle. The worm gear drive efficiency mostly depend on the helix angle of the worm. Usually, multiple thread worms and gears is usually more efficient than one thread worms. Proper thread worms can increase effectiveness.
2) Lubrication. To choose a brand lubricating oil can be an essential factor to boost worm gearbox efficiency. As the proper lubrication can decrease worm gear action friction and heat.
3) Material selection and Gear Manufacturing Technology. For worm shaft, the material ought to be hardened metal. The worm gear material should be aluminium bronze. By reducing the worm gear hardness, the friction on the worm teeth is decreased. In worm manufacturing, to use the specific machine for gear reducing and tooth grinding of worms also can increase worm gearbox efficiency.
From a sizable transmission gearbox capacity to a straight small worm gearbox load, you can choose one from a wide selection of worm reducer that precisely matches your application requirements.
Worm Gear Container Assembly：
1) You may complete the installation in six various ways.
2) The installation must be solid and reliable.
3) Be sure to examine the connection between your electric motor and the worm equipment reducer.
4) You must make use of flexible cables and wiring for a manual installation.
With the help of the most advanced science and drive technology, we’ve developed several unique “square package” designed from high-quality aluminium die casting with a lovely appearance. The modular worm gearbox design series: worm drive gearbox, parallel shaft gearbox, bevel helical gearbox, spiral bevel gearbox, coaxial gearbox, correct angle gearbox. An NMRV series gearbox can be a typical worm gearbox with a bronze worm gear and a worm. Our Helical gearbox products consists of four universal series (R/S/K/F) and a step-less acceleration variation UDL series. Their structure and function act like an NMRV worm gearbox.
In the EP worm gears, the output shaft is offset by 90° from the drive shaft. A double shaft for double-sided output or a cover for the brief shaft end are optionally available as components. EP gearboxes come with a high-quality, long-term synthetic lubricant based on polyethylene glycol, and are as a result maintenancefree. They are seen as a high effectiveness and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears aren’t suitable for positioning applications.
Worm Gear applications
App of worm gears, which is similar to a standard spur and the worm, which is a cylindrical gear that resembles a screw, permits smaller gearboxes or planetary drives, whilst retaining torque or power. It is common for worm gears to have reductions of 20:1, and even up to 300:1 or greater.
Regular gearing includes the initial capability which other gearing components do not have – the “worm” can effortlessly spin the part, however the “gears” are not able to maneuver and fully rotate the worm-zone.
What’s the reason behind this inability to rotate the gear-worm?
The angle is not deep enough on the worm, so when the gear attempts to rotate the worm, high frictional pressure between worm shaft and gear parts keep carefully the zone stuck in position.
Committed to excellence, our employees have the most important priority satisfying your equipment building needs and item improvement.
Also, we consider pride in our equipment; few producers have the gear to engineer steel parts as precise as we do. Even fewer manufacturing businesses have the machining products to check on the tolerances we are able to hold.
Being a gearing manufacturer to Automotive level businesses, with a diverse way to obtain material types, allow us to attain the most challenging task requirements. The combination of robust materials, advanced manufacturer technology, reliability and our dedication to client satisfaction makes us a high supplier in advanced gearing and shafting products.
Our gear manufacturing places have over twenty years of worm gear design expertise, gained through many tasks that included varied sizes of custom made worm gears to print requirements.