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-driving the gearmotor so a position can be held even when power is not applied. The precision surface 3/8” stainless steel output shaft is supported by dual 3/8” ABEC 5 ball bearings to support a load 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 bottom mounting tabs. Our Regular Spur Gear motors will work with this gearbox (motor marketed separately). The Vertical Shaft Worm-Drive Gearbox is perfect for turn-tables, time-lapse systems and low-swiftness 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 had a need to achieve 10 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 Standard Spur Gear Motors
Ever-Power offers you the widest selection of standard, non standard 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 design of gearbox, material selection to manufacturing 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
Center 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 can be made on brief 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 gear boxes possess liberal ribbing for increasing high temperature dissipation area, streamlined sump for carrying more oil and lover 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 conform to case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze as per BS 1400, While Gear case conforms to C.I. Quality 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large acceleration reduction ratios with only one gear pairing in a more compact space when worm wheel gearbox compared with other styles of gears. We offer up to a maximum ratio of 100:1 with our products. Another benefit of the Worm and Wheel equipment pairings is the low level noise they produce. Some disadvantages will be 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 has been achieved by work hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms due to truth that the metallic fibrous structure has not been cut.
2) The top hardness after frosty rolling is increased by 1.2 to 1 1.3 times in comparison to the hardness of the initial material, and the hardness of the helicoid surface area increases to around HB240 to 260.
3) Chilly rolled worms are ideal for miniature gear applications since this is often rotated smoothly without damaging the worm wheels made out of POM or other soft materials.
4) Due to the implementation of this 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 give a smooth procedure and long term durability.
Worm gears are constructed of a worm and a equipment (sometimes known as a worm wheel), with nonparallel, non-intersecting shafts oriented 90 degrees to one another. The worm is definitely analogous to a screw with a V-type thread, and the apparatus is definitely analogous to a spur equipment. The worm is normally the driving component, with the worm’s thread advancing one's teeth of the gear.
Just like a ball screw, the worm in a worm gear may 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. Therefore a gear with 24 teeth will provide a gear reduction of 24:1. For a multi-start 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 almost every other types of gears, where in fact the gear reduction is usually 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 high temperature, which limits the effectiveness of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, high temperature), the worm and gear 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 contributes to quiet operation.) This makes worm gears ideal for use where sound should be minimized, such as in elevators. In addition, the use of a softer material for the apparatus means that it can absorb shock loads, like those experienced in weighty equipment or crushing devices.
The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as quickness reducers in low- to medium-speed applications. And, because their decrease ratio is founded on the number of gear teeth alone, they are smaller sized than other styles of gears. Like fine-pitch business lead screws, worm gears are usually self-locking, making 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 acceleration reduction in a limited space using right angle (90°), non-intersecting shafts. When properly used, worms and worm gears supply the smoothest, quietest kind of gearing.
Because the effectiveness of a worm gear drive depends on the lead angle and amount of begins on the worm - and because increased effectiveness is always a goal, the ratio ought to be kept only 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 Gear Guaranteed Same Time Shipment Program for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications answer highly specialized power transmitting 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 reducing ratios.
With some ratios, there is level of resistance to back driving.
Offered 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 is also relatively simple. However, there is 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 ought to know:
1) Helix position. The worm gear drive efficiency mostly depend on the helix position of the worm. Usually, multiple thread worms and gears is usually more efficient than solitary thread worms. Proper thread worms can increase efficiency.
2) Lubrication. To select a brand lubricating oil is an essential factor to improve worm gearbox efficiency. As the correct lubrication can decrease worm equipment action friction and warmth.
3) Materials selection and Gear Production Technology. For worm shaft, the material ought to be hardened steel. The worm gear material ought to be aluminium bronze. By reducing the worm gear hardness, the friction on the worm the teeth is decreased. In worm manufacturing, to use the specific machine for gear reducing and tooth grinding of worms also can increase worm gearbox performance.
From a sizable transmission gearbox power to an even small worm gearbox load, you can choose one from an array of worm reducer that precisely fits 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) Make sure to examine the connection between the engine and the worm equipment reducer.
4) You must use flexible cables and wiring for a manual set up.
With the help of the innovative science and drive technology, we have developed several unique “square container” 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 standard worm gearbox with a bronze worm equipment 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 short shaft end are elective as accessories. EP gearboxes come with a high-quality, long-term synthetic lubricant based on polyethylene glycol, and so are as a result maintenancefree. They are characterized by high efficiency and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears are not 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 equipment that resembles a screw, permits 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.
Standard 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 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 have the most crucial priority satisfying your equipment building needs and product improvement.
Also, we consider pride inside our equipment; few manufacturers have the gear to engineer metallic parts as specific as we do. Even fewer manufacturing companies have the machining gear to check the tolerances we can hold.
Being a gearing manufacturer to Automotive level companies, with a diverse way to obtain material types, allow us to attain the most challenging task requirements. The mixture of robust components, advanced manufacturer technologies, reliability and our dedication to client satisfaction makes us a high provider in advanced gearing and shafting products.
Our gear manufacturing places have over two decades of worm gear style experience, gained through many tasks that included varied sizes of custom made worm gears to print requirements.