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 is not applied. The precision surface 3/8” stainless steel output shaft is backed by dual 3/8” ABEC 5 ball bearings to support a load from any orientation. The ¼” ABS plastic and light weight aluminum structure offers a rigid framework without adding unnecessary weight and is usually easily installed to any flat work surface by utilizing the base mounting tabs. Our Standard Spur Gear motors will continue to work with this gearbox (motor offered separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-speed applications that require high precision and torque.
Motor RPM required = 1 / (moments per worm wheel gearbox rotation desired / 30)
Example: 1 / (10 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 gives you the widest range of standard, non regular and customised worm gearbox and worm gear motor.
Ever-Power maintains the best level of standard in manufacturing of worm gears in gearboxes. Right from the design 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
Center 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 obtainable in stock or could 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 made from Chill Cast Phosphorous Bronze.
Ever-Power worm equipment boxes possess liberal ribbing for increasing heat dissipation area, streamlined sump for carrying more oil and fan of ample size which is effective in both aspect of rotation.
Design Standards:
Wherever applicable, British in addition to Indian Design standards are used. Worm Shafts conform to case- hardening Alloy Steels, Worm Wheels conform to phosphorous-bronze according to BS 1400, While Equipment case conforms to C.I. Grade 20, IS210.
High reduction gear
Worm and wheel gear pairings provide large speed decrease ratios with only one equipment pairing in a far more compact space when compared with other types of gears. You can expect up to a maximum ratio of 100:1 with our products. Another benefit of the Worm and Wheel gear pairings is the low level noise they produce. Some disadvantages will be the general low performance and the fact that they generate temperature.
Benefit of EP’s Worm Gears – “Chilly rolled Worm Gears”
1) The hardness of the helicoid surface area has been achieved by function hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms due to fact that the metallic fibrous structure is not 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) Frosty rolled worms are suitable for miniature gear applications since this is often rotated smoothly without damaging the worm wheels crafted from POM or various other soft materials.
4) Due to the implementation of the cold rolling method, 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 procedure and long term durability.
Worm gears are constructed of a worm and a gear (sometimes referred to as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 degrees to one another. The worm is analogous to a screw with a V-type thread, and the apparatus is usually analogous to a spur equipment. The worm is typically the driving component, with the worm’s thread advancing the teeth of the gear.
Like a ball screw, the worm in a worm gear might have a single 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 advances the equipment by one tooth. So a gear with 24 teeth will provide a gear reduced amount of 24:1. For a multi-begin worm, the gear reduction equals the number of teeth on the gear, divided by the amount of starts on the worm. (That is different from most other types of gears, where the gear reduction is 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 warmth, which limits the effectiveness of worm gears to 30 to 50 percent. In order to minimize friction (and for that reason, temperature), the worm and equipment are made from dissimilar metals – for instance, the worm could 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 equipment also contributes to quiet operation.) This makes worm gears suitable for use where sound 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 weighty equipment or crushing devices.
The primary advantage of worm gears is their capability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as rate reducers in low- to medium-speed applications. And, because their reduction ratio is based on the amount of gear teeth only, they are smaller sized than other styles 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 a highly effective answer for power tranny applications requiring high-ratio quickness reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest kind of gearing.
Because the effectiveness 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 used 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 Equipment Guaranteed Same Day Shipment Plan for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmission needs.
Our worm gears provide smoothest, quietest kind of gearing.
They provide high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by lowering ratios.
With some ratios, there is level of resistance to back driving.
Obtainable from 48 DP to 3 DP
Stocked as single, double and quad start configurations
How to Select High Efficient Worm Gearbox?
The worm gear production process is also relatively simple. However, there is a low transmission efficiency problem if you don’t understand the how to choose 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. Generally, multiple thread worms and gears is certainly more efficient than one thread worms. Proper thread worms can increase efficiency.
2) Lubrication. To select a brand lubricating oil can be an essential factor to improve worm gearbox efficiency. As the correct lubrication can decrease worm gear action friction and high temperature.
3) Materials selection and Gear Manufacturing Technology. For worm shaft, the material should be hardened metal. The worm gear material ought to be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm teeth is reduced. In worm manufacturing, to use the specialized machine for gear trimming and tooth grinding of worms can also increase worm gearbox effectiveness.
From a sizable transmission gearbox power to a straight small worm gearbox load, you can choose one from a wide range of worm reducer that precisely matches your application requirements.
Worm Gear Box Assembly：
1) You may complete the installation in six different ways.
2) The installation must be solid and reliable.
3) Be sure to check the connection between your electric motor and the worm gear reducer.
4) You must use flexible cables and wiring for a manual installation.
With the help of the innovative science and drive technology, we’ve 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 is definitely a typical worm gearbox with a bronze worm equipment and a worm. Our Helical gearbox product line comprises of four universal series (R/S/K/F) and a step-less speed variation UDL series. Their structure 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 dual shaft for double-sided result or a cover for the short shaft end are optionally available as components. EP gearboxes have a high-quality, long-term synthetic lubricant on the basis of polyethylene glycol, and are therefore maintenancefree. They are seen as a high effectiveness and self-locking.
Please note:
Because of their relatively high backlash (~1-2°), worm gears aren’t suitable for positioning applications.
Worm Gear applications
Application of worm gears, which is comparable to a standard spur and the worm, which is a cylindrical equipment that resembles a screw, allows for smaller gearboxes or planetary drives, while retaining torque or power. It is common for worm gears to have reductions of 20:1, and also up to 300:1 or greater.
Usual 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 reason behind this inability to rotate the gear-worm?
The angle isn’t deep enough on the worm, so when the gear 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 possess 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 steel parts as precise as we do. Even fewer manufacturing businesses have the machining tools to check on the tolerances we can hold.
Being a gearing producer to Automotive level companies, with a diverse way to obtain material types, allow us to attain the most challenging task requirements. The combination of robust components, advanced manufacturer systems, reliability and our dedication to customer satisfaction makes us 
a top supplier in advanced gearing and shafting products.
Our gear manufacturing places have over twenty years of worm gear style expertise, gained through many tasks that included varied sizes of custom worm gears to print requirements.