This gearbox utilizes a 30:1 ratio worm-drive reduction for applications that want 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 floor 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 aluminium structure offers a rigid framework without adding unnecessary weight and is definitely easily mounted to any flat surface by utilizing the base mounting tabs. Our Standard Spur Gear motors will work with this gearbox (electric motor marketed separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-rate applications that want high precision and torque.
Motor RPM required = 1 / (mins per rotation desired / 30)
Example: 1 / (10 minutes per rotation / 30) = 3 RPM motor needed to achieve 10 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 range of standard, non standard and customised worm gearbox and worm gear motor.
Ever-Power maintains the highest level of standard in worm wheel gearbox manufacturing of worm gears in gearboxes. Right from the look of gearbox, material selection to manufacturing 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
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 often available in stock or could be made on short notice by customer.
Worm gearboxes are experiencing cast iron equipment case, worm shaft is of Alloy Steel, duly hardened and tempered. The worm wheel is made of Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes have liberal ribbing for increasing warmth dissipation area, streamlined sump to carry more oil and fan of ample size which works well in both aspect of rotation.
Design Standards:
Wherever applicable, British along with 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. Quality 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large speed decrease ratios with only 1 equipment pairing in a more compact space in comparison to other styles of gears. You can expect up to maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel gear pairings is the low level noise they produce. Some disadvantages are the general low efficiency and the actual fact that they generate heat.
Advantage of EP’s Worm Gears – “Chilly 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 due to reality that the metallic fibrous framework has not been cut.
2) The surface hardness after cool rolling is increased by 1.2 to 1 1.3 times when compared with the hardness of the initial materials, and the hardness of the helicoid surface increases to around HB240 to 260.
3) Chilly rolled worms are suitable for miniature equipment 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 this cold rolling method, the helicoid surface of EP-Worm (M0.5 to 2.0) comes out with a mirror like complete. Thus, EP-Precision Cold Rolled Worms provide a smooth operation and long-term durability.
Worm gears are made of a worm and a gear (sometimes referred to as a worm wheel), with nonparallel, nonintersecting shafts oriented 90 degrees to one another. The worm is certainly analogous to a screw with a V-type thread, and the gear is definitely analogous to a spur equipment. The worm is normally the generating component, with the worm’s thread advancing the 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 complete turn (360 degrees) of the worm advances the equipment by one tooth. Therefore a gear with 24 teeth provides a gear reduced amount of 24:1. For a multi-begin worm, the apparatus reduction equals the number of teeth on the gear, divided by the amount of starts on the worm. (This is different from most other types of gears, where in fact the gear reduction can be 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 action causes friction and heat, which limits the performance of worm gears to 30 to 50 percent. To be able to minimize friction (and for that reason, heat), the worm and equipment are constructed with dissimilar metals – for instance, the worm could be made of hardened metal and the gear manufactured from 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 procedure.) This makes worm gears suitable for use where sound should be minimized, such as in elevators. Furthermore, the usage 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 advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as velocity reducers in low- to medium-acceleration applications. And, because their decrease ratio is based on the number of gear teeth alone, they are smaller sized than other styles of gears. Like fine-pitch lead screws, worm gears are typically self-locking, making them well suited 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 velocity reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly used, worms and worm gears supply the smoothest, quietest type of gearing.
Because the performance of a worm equipment drive depends on the business lead angle and quantity of begins on the worm – and because increased performance is always an objective, the ratio ought to be kept as low as possible. To run correctly, worms and worm gears used together must 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 Plan for the quickest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmitting 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 decreasing ratios.
With some ratios, there is resistance to back driving.
Obtainable 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 if you don’t understand the how to select the worm gearbox. 3 basic point to choose high worm gear efficiency that you need to know:
1) Helix angle. The worm equipment drive efficiency mostly rely 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 can be an essential factor to improve worm gearbox efficiency. As the correct lubrication can decrease worm equipment action friction and heat.
3) Material selection and Gear Manufacturing Technology. For worm shaft, the material should be hardened steel. The worm gear materials ought to be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm tooth is decreased. In worm production, to use the specialized machine for gear cutting and tooth grinding of worms also can increase worm gearbox performance.
From a big transmission gearbox power to a straight small worm gearbox load, 
you can choose one from a wide range of worm reducer that precisely fits your application requirements.
Worm Gear Box Assembly：
1) You can complete the installation in six different ways.
2) The installation must be solid and reliable.
3) Be sure to check the connection between the electric motor and the worm equipment reducer.
4) You must use flexible cables and wiring for a manual set up.
By using the most advanced science and drive technology, we’ve developed several unique “square box” 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, right angle gearbox. An NMRV series gearbox is 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 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 result or a cover for the brief shaft end are elective as accessories. EP gearboxes have a high-quality, long-term synthetic lubricant based on polyethylene glycol, and so 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 are not ideal for positioning applications.
Worm Gear applications
App of worm gears, which is comparable to a typical spur and the worm, which is a cylindrical gear 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 even up to 300:1 or greater.
Common gearing includes the initial capability which other gearing components do not 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 the zone stuck constantly in place.
Focused on excellence, our employees have the most important priority satisfying your equipment building needs and product improvement.
Also, we take pride inside our equipment; few producers have the equipment to engineer metallic parts as precise as we do. Also fewer manufacturing companies have the machining apparatus to check on the tolerances we can hold.
Being a gearing manufacturer to Automotive level companies, with a diverse supply of material types, allow us to attain the most challenging project requirements. The combination of robust materials, advanced manufacturer technology, reliability and our commitment to customer satisfaction makes us a top provider in advanced gearing and shafting items.
Our gear manufacturing places have over two decades of worm gear design experience, gained through many tasks that included varied sizes of custom made worm gears to print requirements.