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 only minimizes backlash but also eliminates back-driving the gearmotor so a position can be held 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 support lots from any orientation. The ¼” ABS plastic and light weight aluminum structure provides a rigid framework without adding unnecessary weight and can be easily installed to any flat surface by utilizing the bottom mounting tabs. Our Standard Spur Gear motors will continue to work with this gearbox (motor offered separately). The Vertical Shaft Worm-Drive Gearbox is perfect for turn-tables, time-lapse systems and low-speed 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 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 Regular Spur Gear Motors
Ever-Power gives you the widest range of standard, non standard and customised worm gearbox and worm equipment motor.
Ever-Power maintains the best degree of standard in manufacturing of worm gears in gearboxes. From the look of gearbox, materials 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 often available 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 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 area, streamlined sump for carrying more oil and lover of ample size which is effective in both aspect of rotation.
Design Standards:
Wherever applicable, British and also Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze according to BS 1400, While Gear case conforms to C.I. Quality 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large rate decrease ratios with only 1 equipment pairing in a more compact space when compared with 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 will be the general low effectiveness and the fact that they generate warmth.
worm wheel gearbox benefit of EP’s Worm Gears - “Cool rolled Worm Gears”
1) The hardness of the helicoid surface 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 top hardness after cold rolling is increased by 1.2 to 1 1.3 times when compared with the hardness of the original materials, and the hardness of the helicoid surface increases to around HB240 to 260.
3) Cool rolled worms are ideal for miniature gear applications since this can be rotated smoothly without damaging the worm wheels crafted from POM or additional soft materials.
4) Because of the implementation of the cold rolling technique, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes away with a mirror like finish. Thus, EP-Precision Cool Rolled Worms provide a smooth operation and long term durability.
Worm gears are made of a worm and a equipment (sometimes known as a worm wheel), with nonparallel, non-intersecting shafts oriented 90 degrees to each other. The worm is usually analogous to a screw with a V-type thread, and the apparatus can be analogous to a spur equipment. The worm is typically the traveling component, with the worm’s thread advancing one's teeth of the gear.
Such as 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 gear by one tooth. So a gear with 24 teeth provides a gear reduction of 24:1. For a multi-begin worm, the gear reduction equals the amount of teeth on the gear, divided by the amount of begins on the worm. (That is different from most 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 gear is a mixture of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and warmth, which limits the effectiveness of worm gears to 30 to 50 percent. To be able to minimize friction (and therefore, heat), the worm and gear are constructed with dissimilar metals - for instance, the worm may be made of hardened steel and the gear manufactured from bronze or aluminum.
Although the sliding contact reduces efficiency, it provides very quiet operation. (The utilization of dissimilar metals for the worm and gear also plays a part in quiet operation.) This makes worm gears suitable for use where noise should be minimized, such as in elevators. Furthermore, the use of a softer materials for the gear means that it could absorb shock loads, like those skilled 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 can also be utilized as acceleration reducers in low- to medium-velocity applications. And, because their decrease ratio is founded on the number of gear teeth by itself, they are smaller sized than other types of gears. Like fine-pitch lead screws, worm gears are usually self-locking, which makes them perfect for hoisting and lifting applications.
Worms & Worm Gears
EP Gear's worms and worm gears provide a highly effective answer for power transmission applications requiring high-ratio velocity reduction in a restricted space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest kind of gearing.
Because the effectiveness of a worm equipment drive depends on the business lead angle and number of starts on the worm - and because increased effectiveness is always a goal, 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 can be ordered through the EP Gear Guaranteed Same Day time Shipment Program for the quickest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmission needs.
Our worm gears offer the smoothest, quietest type of gearing.
They offer high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by lowering ratios.
With some ratios, there is resistance to back driving.
Available 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 know the how to select the worm gearbox. 3 basic point to choose high worm equipment efficiency that you need to know:
1) Helix angle. The worm equipment drive efficiency mostly rely on the helix angle of the worm. Usually, multiple thread worms and gears is definitely more efficient than single thread worms. Proper thread worms can increase efficiency.
2) Lubrication. To choose a brand lubricating essential oil is an essential factor to improve worm gearbox performance. As the correct lubrication 
can reduce worm equipment action friction and high temperature.
3) Material selection and Gear Production Technology. For worm shaft, the material should be hardened metal. The worm gear material should be aluminium bronze. By reducing the worm gear hardness, the friction on the worm teeth is reduced. In worm manufacturing, to use the specialized machine for gear reducing and tooth grinding of worms also can increase worm gearbox effectiveness.
From a sizable transmission gearbox capacity to a straight small worm gearbox load, you can choose one from an array of worm reducer that precisely fits your application requirements.
Worm Gear Container Assembly：
1) You may complete the set up in six different ways.
2) The installation should be solid and reliable.
3) Be sure to verify the connection between the engine 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 have developed several unique “square package” 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 usually a typical 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 rate 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 output or a cover for the brief shaft end are elective as add-ons. EP gearboxes come with a high-quality, long-term synthetic lubricant based on polyethylene glycol, and so are consequently maintenancefree. They are seen as a high performance and self-locking.
Please note:
Because of their relatively high backlash (~1-2°), worm gears are not suitable 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 also up to 300:1 or greater.
Normal gearing includes the unique capability which additional gearing components don't have - the “worm” can effortlessly spin the part, however 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 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 crucial priority satisfying your gear building needs and product improvement.
Also, we take pride in our equipment; few producers have the equipment to engineer metallic parts as specific as we do. Even fewer manufacturing companies have the machining apparatus to check on the tolerances we are able to hold.
Being a gearing producer to Automotive level businesses, with a diverse way to obtain material types, allow all of us to achieve the most challenging task requirements. The combination of robust materials, advanced manufacturer systems, reliability and our commitment to client satisfaction makes us a high provider in advanced gearing and shafting products.
Our gear manufacturing locations have over twenty years of worm gear style experience, gained through many tasks that included varied sizes of custom worm gears to print requirements.