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-traveling the gearmotor so a position can be held even when power isn’t applied. The precision floor 3/8” stainless steel output shaft is supported by dual 3/8” ABEC 5 ball bearings to aid lots from any orientation. The ¼” ABS plastic and aluminium structure offers a rigid framework without adding unnecessary weight and is certainly easily mounted to any flat work surface by utilizing the base mounting tabs. Our Regular Spur Gear motors will work with this gearbox (engine 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 / (moments per rotation desired / 30)
Example: 1 / (ten minutes per rotation / 30) = 3 RPM motor needed to achieve ten minutes per rotation (in 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 offers you the widest range of standard, non regular and customised worm gearbox and worm equipment motor.
Ever-Power maintains the best level of standard in manufacturing of worm gears in gearboxes. From the look of gearbox, material selection to production practice of worm equipment box and gear 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 can be made on short notice by customer.
Worm gearboxes are having cast iron gear case, worm shaft is of Alloy Steel, duly hardened and tempered. The worm wheel is constructed of Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes have liberal ribbing for increasing temperature dissipation area, streamlined sump for carrying more oil and fan of ample size which works well in both side of rotation.
Design Standards:
Wherever applicable, British in addition to Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze as per BS 1400, While Equipment case conforms to C.I. Grade 20, IS210.
High reduction gear
Worm and wheel gear pairings provide large acceleration decrease ratios with only one gear pairing in a more compact space when compared with other styles of gears. You can expect up to a maximum ratio of 100:1 with this products. Another advantage of the Worm and Wheel equipment pairings is the low level noise they produce. Some drawbacks are the general low effectiveness and the fact that they generate temperature.
Benefit of EP’s Worm Gears – “Cold rolled Worm Gears”
1) The hardness of the helicoid surface area has been attained by work hardening when the frosty rolling was performed, providing Worm gears with better mechanical properties than machined worms due to truth that the metallic fibrous framework is not cut.
2) The top hardness after cold rolling is increased by 1.2 to at least one 1.3 times when compared with the hardness of the initial material, 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 can be rotated smoothly without damaging the worm wheels crafted from POM or various other soft materials.
4) Because of the implementation of the cold rolling technique, the helicoid surface of EP-Worm (M0.5 to 2.0) comes out with a mirror like finish. Thus, EP-Precision Cold Rolled Worms give a smooth worm wheel gearbox operation and long-term durability.
Worm gears are made of a worm and a equipment (sometimes known as a worm wheel), with non-parallel, nonintersecting shafts oriented 90 degrees to each other. The worm is certainly analogous to a screw with a V-type thread, and the apparatus can be analogous to a spur gear. 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 an individual start or multiple starts – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each full convert (360 degrees) of the worm advances the gear by one tooth. Therefore a gear with 24 teeth will provide a gear reduced amount of 24:1. For a multi-start worm, the apparatus reduction equals the number of teeth on the apparatus, divided by the amount of begins on the worm. (That is different from almost every other types of gears, where the gear reduction can be a function of the diameters of the two components.)
The meshing of the worm and the gear is a mixture of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding actions causes friction and temperature, which limits the performance of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, warmth), the worm and equipment are made from dissimilar metals – for example, the worm may be made of hardened metal and the gear made of bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The use of dissimilar metals for the worm and equipment also contributes to quiet operation.) This makes worm gears ideal for use where noise should be minimized, such as for example in elevators. Furthermore, the use of a softer material for the apparatus means that it could absorb shock loads, like those skilled in heavy equipment or crushing machines.
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 velocity reducers in low- to medium-quickness applications. And, because their decrease ratio is based on the amount of gear teeth by itself, they are more compact than other types of gears. Like fine-pitch business lead screws, worm gears are typically self-locking, making them perfect 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 acceleration reduction in a limited space using correct angle (90°), non-intersecting shafts. When properly used, worms and worm gears supply the smoothest, quietest form of gearing.
Because the performance of a worm gear drive depends upon the lead angle and number of begins on the worm – and because increased efficiency is always an objective, the ratio should be kept as low as possible. To run correctly, worms and worm gears utilized together must have the same diametral pitch and threads.
Our complete type of worms and worm gears can be ordered through the EP Equipment Guaranteed Same Time Shipment Plan for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications answer highly specialized power tranny needs.
Our worm gears provide smoothest, quietest kind of gearing.
They offer high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is resistance to back driving.
Available from 48 DP to 3 DP
Stocked as single, double and quad start configurations
How exactly to Select High Efficient Worm Gearbox?
The worm gear production process is also relatively simple. Nevertheless, there exists a low transmission performance problem in the event that you don’t know the how to select the worm gearbox. 3 basic point to choose high worm equipment efficiency that you ought to know:
1) Helix position. The worm equipment drive efficiency mostly depend on the helix angle of the worm. Generally, multiple thread worms and gears is more efficient than single thread worms. Proper thread worms can increase effectiveness.
2) Lubrication. To choose a brand lubricating oil is an essential factor to boost worm gearbox performance. As the proper lubrication can decrease worm equipment action friction and warmth.
3) Materials selection and Gear Manufacturing Technology. For worm shaft, the material ought to be hardened steel. The worm gear materials 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 trimming and tooth grinding of worms can also increase worm gearbox performance.
From a huge transmission gearbox capacity to an even small worm gearbox load, you can choose one from a wide variety of worm reducer that precisely suits your application requirements.
Worm Gear Package Assembly：
1) You may complete the installation in six different ways.
2) The installation should be solid and reliable.
3) Ensure that you examine the connection between your electric motor and the worm gear 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 have developed several unique “square package” designed from high-quality aluminium 
die casting with a beautiful appearance. The modular worm gearbox design series: worm drive gearbox, parallel shaft gearbox, bevel helical gearbox, spiral bevel gearbox, coaxial gearbox, right angle gearbox. An NMRV series gearbox can be a standard worm gearbox with a bronze worm gear and a worm. Our Helical gearbox products comprises of four universal series (R/S/K/F) and a step-less rate 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 result or a cover for the brief shaft end are elective as accessories. EP gearboxes have a high-quality, long-term synthetic lubricant on the basis of 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 are not suitable for positioning applications.
Worm Gear applications
Program of worm gears, which is comparable to a standard spur and the worm, which really is a cylindrical gear that resembles a screw, permits smaller gearboxes or planetary drives, while retaining torque or power. It is common for worm gears to have got reductions of 20:1, and actually up to 300:1 or greater.
Standard gearing includes the unique capability which additional gearing components don’t have – the “worm” can effortlessly spin the part, but the “gears” cannot maneuver and fully rotate the worm-zone.
What’s the real reason for this inability to rotate the gear-worm?
The angle is not deep enough on the worm, so when the apparatus attempts to rotate the worm, high frictional pressure between worm shaft and gear parts keep the zone stuck constantly in place.
Focused on excellence, our employees possess the most crucial priority satisfying your gear building needs and item improvement.
Also, we take pride inside our equipment; few manufacturers have the gear to engineer steel parts as precise as we do. Actually fewer manufacturing companies have the machining devices to check on the tolerances we are able to hold.
Being a gearing producer to Automotive level businesses, with a diverse supply of material types, allow us to achieve the most challenging project requirements. The mixture of robust materials, advanced manufacturer systems, reliability and our commitment to client satisfaction makes us a high supplier in advanced gearing and shafting items.
Our gear manufacturing locations have over two decades of worm gear style experience, gained through many projects that included varied sizes of custom made worm gears to print requirements.