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 merely minimizes backlash but also eliminates back-traveling the gearmotor so a posture can be kept even when power isn’t applied. The precision surface 3/8” stainless steel result shaft is backed by dual 3/8” ABEC 5 ball bearings to aid a load from any orientation. The ¼” ABS plastic and aluminum structure provides a rigid framework without adding unnecessary weight and is usually easily mounted to any flat surface by utilizing the bottom mounting tabs. Our Regular Spur Gear motors will work with this gearbox (motor offered separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-acceleration applications that require high precision and torque.

Motor RPM required = 1 / (moments per rotation desired / 30)
Example: 1 / (10 minutes per rotation / 30) = 3 RPM motor needed to achieve ten minutes per rotation (in max speed)
Dimensions 3.43″ x 1.93″
Product Weight 5.9oz (0.375 lbs)
Output Shaft Diameter 3/8″ (0.375″)
Motor Size Compatibility Standard Spur Gear Motors

Ever-Power gives you the widest selection of standard, non regular and customised worm gearbox and worm gear motor.

Ever-Power maintains the best degree of standard in production of worm gears in gearboxes. Right from the look of gearbox, materials 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 often obtainable in stock or can be made on short notice by customer.
Worm gearboxes are experiencing cast iron gear case, worm shaft is of Alloy Steel, duly worm wheel gearbox hardened and tempered. The worm wheel is constructed of Chill Cast Phosphorous Bronze.

Ever-Power worm gear boxes have liberal ribbing for increasing heat dissipation area, streamlined sump to carry more oil and lover of ample size which is effective in both part of rotation.

Design Standards:
Wherever applicable, British along with Indian Design standards are used. Worm Shafts conform to case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze according to BS 1400, While Equipment case conforms to C.I. Quality 20, IS210.

High reduction gear
Worm and wheel gear pairings provide large speed reduction ratios with only 1 gear pairing in a more compact space in comparison to other types of gears. You can expect up to maximum ratio of 100:1 with this products. Another benefit of the Worm and Wheel equipment pairings is the low level sound they produce. Some drawbacks will be the general low performance and the actual fact that they generate warmth.

Benefit of EP’s Worm Gears – “Cold rolled Worm Gears”
1) The hardness of the helicoid surface has been attained by function hardening when the cool rolling was performed, providing Worm gears with better mechanical properties than machined worms due to fact that the metallic fibrous structure has not been cut.

2) The surface hardness after cold rolling is increased by 1.2 to at least one 1.3 times when compared with the hardness of the initial materials, and the hardness of the helicoid surface area increases to around HB240 to 260.

3) Cold 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 method, the helicoid surface of EP-Worm (M0.5 to 2.0) comes away with a mirror like finish. Thus, EP-Precision Cold Rolled Worms give a smooth procedure and long term durability.

Worm gears are constructed of a worm and a gear (sometimes known as a worm wheel), with non-parallel, nonintersecting shafts oriented 90 degrees to one another. The worm is usually analogous to a screw with a V-type thread, and the apparatus is usually analogous to a spur gear. The worm is typically the traveling component, with the worm’s thread advancing the teeth of the gear.

Just like a ball screw, the worm in a worm gear may have an individual start or multiple starts – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each complete change (360 degrees) of the worm increases the equipment by one tooth. Therefore a gear with 24 teeth provides a gear reduction of 24:1. For a multi-start worm, the apparatus reduction equals the amount of teeth on the apparatus, divided by the number of starts 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 both components.)
The meshing of the worm and the gear is an assortment of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and temperature, which limits the effectiveness of worm gears to 30 to 50 percent. To be able to minimize friction (and for that reason, heat), the worm and gear are made from dissimilar metals – for instance, the worm may be made of hardened steel and the gear manufactured from bronze or aluminum.

Although the sliding contact decreases efficiency, it provides extremely quiet operation. (The utilization 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 utilization of a softer materials for the apparatus means that it could absorb shock loads, like those experienced in large equipment or crushing machines.

The primary benefit of worm gears is their capability to provide high reduction ratios and correspondingly high torque multiplication. They may also be used as acceleration reducers in low- to medium-speed applications. And, because their decrease ratio is based on the number of gear teeth by itself, they are more compact than other styles of gears. Like fine-pitch business lead screws, worm gears are usually self-locking, making them ideal for hoisting and lifting applications.

Worms & Worm Gears
EP Gear’s worms and worm gears provide a highly effective answer for power transmitting applications requiring high-ratio speed reduction in a restricted space using right angle (90°), non-intersecting shafts. When properly used, worms and worm gears supply the smoothest, quietest kind of gearing.

Because the efficiency of a worm equipment drive depends on the lead angle and number of begins on the worm – and because increased performance is always a goal, the ratio should be kept as low as possible. To run correctly, worms and worm gears utilized together will need to have the same diametral pitch and threads.

Our complete type of worms and worm gears could be ordered through the EP Gear Guaranteed Same Day time Shipment Plan for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power transmitting 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, dual and quad start configurations

How exactly to Select High Efficient Worm Gearbox?
The worm gear production process can be relatively simple. Nevertheless, there exists a low transmission efficiency problem if you don’t understand the how to select the worm gearbox. 3 basic point to choose high worm gear efficiency that you should know:

1) Helix angle. The worm equipment drive efficiency mostly depend on the helix position of the worm. Usually, multiple thread worms and gears can be more efficient than one thread worms. Proper thread worms can increase performance.

2) Lubrication. To select a brand lubricating essential oil can be an essential factor to boost worm gearbox efficiency. As the proper lubrication can reduce worm gear action friction and warmth.

3) Material selection and Gear Production Technology. For worm shaft, the material ought to be hardened steel. The worm gear material should be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm tooth is reduced. In worm manufacturing, to use the specialized machine for gear cutting and tooth grinding of worms can also increase worm gearbox performance.

From a big transmission gearbox power 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 Box Assembly：
1) You may complete the set up in six various ways.

2) The installation must 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.

By using the innovative science and drive technology, we have developed several unique “square box” 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, right angle gearbox. An NMRV series gearbox is certainly a standard worm gearbox with a bronze worm gear and a worm. Our Helical gearbox product line comprises of four universal series (R/S/K/F) and a step-less swiftness variation UDL series. Their framework and function are similar to 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 short shaft end are elective as components. EP gearboxes have a high-quality, long-term synthetic lubricant based on polyethylene glycol, and are therefore maintenancefree. They are characterized by high performance and self-locking.

Please note:
Due to their relatively high backlash (~1-2°), worm gears are not ideal for positioning applications.

Worm Gear applications
Application of worm gears, which is comparable to a typical spur and the worm, which really is a cylindrical equipment that resembles a screw, permits smaller gearboxes or planetary drives, while retaining torque or power. It’s quite common for worm gears to possess reductions of 20:1, and also up to 300:1 or greater.

Usual gearing includes the initial capability which additional gearing components don’t have – the “worm” can effortlessly spin the part, but the “gears” are not able to maneuver and fully rotate the worm-zone.

What’s the real reason for this inability to rotate the gear-worm?

The angle isn’t 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 in position.

Committed to excellence, our employees have the most important priority satisfying your gear building needs and item improvement.

Also, we take pride inside our equipment; few producers have the gear to engineer metal 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 companies, with a diverse supply of material types, allow all of us to achieve the most challenging project requirements. The mixture of robust components, advanced manufacturer technologies, reliability and our dedication to customer satisfaction makes us a high supplier in advanced gearing and shafting items.

Our gear manufacturing places have over twenty years of worm gear style expertise, gained through many projects that included varied sizes of custom worm gears to print requirements.