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 position can be kept even when power is not applied. The precision ground 3/8” stainless steel result shaft is supported 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 usually easily installed to any flat surface by utilizing the bottom mounting tabs. Our Regular Spur Gear motors will work with this gearbox (engine sold separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-quickness applications that require 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 (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 Standard Spur Gear Motors
Ever-Power offers you the widest range of standard, non regular and customised worm gearbox and worm gear motor.
Ever-Power maintains the highest level of standard in manufacturing of worm gears in gearboxes. From the look of gearbox, materials selection to production practice of worm equipment box and gear engine.
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 Versions like C.D. 50, 60, 75, 85, 100 mm and Ratio 30/1 or 40/1 are usually obtainable in stock or could be made on brief notice by customer.
Worm gearboxes are experiencing cast iron equipment case, worm shaft is of Alloy Metal, duly hardened and tempered. The worm wheel is made of Chill Cast Phosphorous Bronze.
Ever-Power worm equipment boxes have liberal ribbing for increasing heat dissipation region, streamlined sump to carry more oil and fan of ample size which works well in both aspect of rotation.
Design Standards:
Wherever applicable, British as well as Indian Design standards are used. Worm Shafts conform to case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze according to BS 1400, While Gear case conforms to C.I. Grade 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large speed reduction ratios with only 1 gear pairing in a far more compact space when compared with other styles of gears. We offer up to maximum ratio of 100:1 with this products. Another benefit of the Worm and Wheel gear pairings may be the low level noise they produce. Some drawbacks are the general low efficiency and the fact that they generate warmth.
Benefit of EP’s Worm Gears – “Cold rolled Worm Gears”
1) The hardness of the helicoid surface has been achieved by work hardening when the frosty rolling was performed, providing Worm gears with better mechanical properties than machined worms because of fact that the metallic fibrous structure is not cut.
2) The surface hardness after chilly rolling is increased by 1.2 to at least one 1.3 times when compared with 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 worm wheel gearbox miniature equipment applications since this could be rotated smoothly without damaging the worm wheels made out of POM or other soft materials.
4) Because of the implementation of the cold rolling method, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes away with a mirror like complete. Thus, EP-Precision Chilly Rolled Worms give a smooth operation and long term durability.
Worm gears are constructed of a worm and a equipment (sometimes referred to as a worm wheel), with non-parallel, nonintersecting shafts oriented 90 degrees to each other. The worm is usually analogous to a screw with a V-type thread, and the gear is analogous to a spur equipment. The worm is normally the driving component, with the worm’s thread advancing the teeth of the gear.
Such as a ball screw, the worm in a worm gear may have an individual start or multiple starts – meaning that there are multiple threads, or helicies, on the worm. For a single-start worm, each complete turn (360 degrees) of the worm advances the gear 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 number of teeth on the gear, divided by the amount of begins on the worm. (That is different from most other types of gears, where the gear reduction is definitely a function of the diameters of both components.)
The meshing of the worm and the apparatus is a mixture of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding actions causes friction and warmth, which limits the performance of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, high temperature), the worm and equipment are constructed with dissimilar metals – for example, the worm may be made of hardened steel 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 plays a part in quiet operation.) This makes worm gears ideal for use where noise should be minimized, such as in elevators. In addition, the use of a softer materials for the gear means that it could absorb shock loads, like those experienced in weighty equipment or crushing machines.
The primary advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as swiftness reducers in low- to medium-rate applications. And, because their reduction ratio is based on the amount of gear teeth only, they are smaller sized than other types of gears. Like fine-pitch lead screws, worm gears are usually self-locking, which makes them ideal 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 rate reduction in a limited space using right angle (90°), nonintersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest type of gearing.
Because the performance of a worm equipment drive depends upon the lead angle and number of starts on the worm – and because increased performance is always an objective, the ratio should be kept as low as possible. To run properly, worms and worm gears utilized together will need to 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 Plan for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power tranny needs.
Our worm gears provide smoothest, quietest type of gearing.
They provide high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by reducing 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 is also relatively simple. Nevertheless, there is a low transmission efficiency problem if you don’t know the how to select the worm gearbox. 3 basic indicate choose high worm gear efficiency that you need to know:
1) Helix position. The worm equipment drive efficiency mostly depend on the helix position of the worm. Usually, multiple thread worms and gears is more efficient than solitary thread worms. Proper thread worms can increase efficiency.
2) Lubrication. To choose a brand lubricating essential oil is an essential factor to boost worm gearbox efficiency. As the proper lubrication can decrease worm gear action friction and temperature.
3) Material selection and Gear Production Technology. For worm shaft, the material ought to be hardened steel. The worm gear materials should be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm the teeth is reduced. In worm manufacturing, to use the specific machine for gear cutting and tooth grinding of worms can also increase worm gearbox efficiency.
From a huge transmission gearbox power to an even small worm gearbox load, you can choose one from an array of worm reducer that precisely matches your application requirements.
Worm Gear Box Assembly：
1) You can complete the installation in six different ways.
2) The installation should be solid and reliable.
3) Ensure that you verify the connection between your electric motor and the worm gear reducer.
4) You must make use of flexible cables and wiring for a manual set up.
With the help of the innovative science and drive technology, we’ve developed several unique “square container” designed from high-quality aluminium die casting with a lovely appearance. The modular worm gearbox style series: worm drive gearbox, parallel shaft gearbox, bevel helical gearbox, spiral bevel gearbox, coaxial gearbox, correct angle gearbox. An NMRV series gearbox is usually a typical worm gearbox with a bronze worm gear and a worm. Our Helical gearbox product line consists of four universal series (R/S/K/F) and a step-less swiftness 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 dual shaft for double-sided output or a cover for the short shaft end are elective as components. EP gearboxes come with a high-quality, long-term synthetic lubricant on the basis of polyethylene glycol, and so are therefore maintenancefree. They are characterized by high performance and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears aren’t suitable for positioning applications.
Worm Gear applications
Program of worm gears, which is similar to a typical spur and the worm, which really is a cylindrical equipment that resembles a screw, allows for smaller gearboxes or planetary drives, whilst retaining torque or power. It is common for worm gears to have got reductions of 20:1, and even up to 300:1 or greater.
Common gearing includes the unique 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 reason behind 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 carefully the zone stuck in position.
Committed to excellence, our employees possess the most important priority satisfying your gear building needs and item improvement.
Also, we take pride in our equipment; few producers have the gear to engineer steel parts as precise as we do. Also fewer manufacturing businesses have the machining equipment to check the tolerances we are able to hold.
Being a gearing producer to Automotive level companies, with a diverse way to obtain material types, allow all of us to attain the most challenging project requirements. The mixture of robust materials, advanced manufacturer systems, reliability and our dedication to client satisfaction makes us a top supplier in advanced gearing and shafting items.
Our gear manufacturing locations 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.