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 only minimizes backlash but also eliminates back-traveling 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 aid a load from any orientation. The ¼” ABS plastic and aluminium structure provides a rigid framework without adding unnecessary weight and can be easily mounted to any flat work surface by utilizing the bottom mounting tabs. Our Standard Spur Gear motors will work with this gearbox (electric motor offered separately). The Vertical Shaft Worm-Drive Gearbox is perfect for turn-tables, time-lapse systems and low-acceleration applications that want high precision and torque.
Motor RPM required = 1 / (moments 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″
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 highest degree of standard in manufacturing of worm gears in gearboxes. Right from the design of gearbox, materials selection to production practice of worm gear 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
Middle 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 often available in stock or could be made on brief 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 from Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes possess liberal ribbing for increasing heat dissipation region, streamlined sump to carry more oil and fan of ample size which is effective in both side of rotation.
Design Standards:
Wherever applicable, British in addition to Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels comply with 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 rate reduction ratios with only 1 gear pairing in a far more compact space in comparison to other styles of gears. You can expect up to a maximum ratio of 100:1 with this products. Another advantage of the Worm and Wheel equipment pairings may be the low level sound they produce. Some drawbacks will be the general low effectiveness and the actual fact that they generate heat.
Benefit of EP’s Worm Gears – “Frosty 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 reality 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 in comparison to 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 equipment applications since this can be rotated smoothly without damaging the worm wheels made out of POM or other soft materials.
4) Due to the implementation of the cold rolling technique, the helicoid surface of EP-Worm (M0.5 to 2.0) comes out with a mirror like finish. Thus, EP-Precision Cool Rolled Worms give a smooth operation and long term durability.
Worm gears are made of a worm and a gear (sometimes known 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 gear is certainly analogous to a spur gear. The worm is normally the traveling component, with the worm’s thread advancing one’s teeth of the gear.
Just 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 increases the gear by one tooth. Therefore a gear with 24 teeth provides a gear reduction of 24:1. For a multi-begin worm, the apparatus reduction equals the number of teeth on the apparatus, divided by the amount of starts on the worm. (This is different from almost every other types of gears, where the gear reduction is certainly a function of the diameters of both components.)
The meshing of the worm and the gear is an assortment 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. In order to minimize friction (and for that reason, high temperature), the worm and gear are constructed with dissimilar metals – for example, the worm could be made of hardened steel and the gear made of bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The utilization of dissimilar metals for the worm and gear also contributes to quiet procedure.) This makes worm gears ideal for use where noise should be minimized, such as for example in elevators. In addition, the utilization of a softer materials for the apparatus means that it can absorb shock loads, like those experienced in heavy equipment or crushing machines.
The primary advantage of worm gears is their capability to provide high reduction ratios and correspondingly high torque multiplication. They may also be used as velocity reducers in low- to medium-velocity applications. And, because their reduction ratio is based on the amount of gear teeth by itself, they are more compact than other styles of gears. Like fine-pitch business 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 transmission applications requiring high-ratio swiftness reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest type of gearing.
Because the efficiency of a worm gear 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 only possible. To run correctly, worms and worm gears used 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 time Shipment Program for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmission needs.
Our worm gears provide smoothest, quietest type of gearing.
They offer high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is level of resistance to back driving.
Available 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 can be relatively simple. However, there is a low transmission performance problem if you don’t know the how to choose the worm gearbox. 3 basic indicate choose high worm gear efficiency that you ought to know:
1) Helix angle. The worm gear drive efficiency mostly depend on the helix angle of the worm. Usually, multiple thread worms and gears is more efficient than single thread worms. Proper thread worms can increase effectiveness.
2) Lubrication. To select a brand lubricating oil is an essential factor to boost worm gearbox effectiveness. As the proper lubrication can reduce worm equipment action friction and warmth.
3) Materials selection and Gear Production Technology. For worm shaft, the material should be hardened steel. The worm gear materials should be aluminium bronze. By reducing the worm gear hardness, the friction on the worm tooth is decreased. In worm manufacturing, to use the specialized machine for gear cutting and tooth grinding of worms also can increase worm gearbox performance.
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 suits your application requirements.
Worm Gear Box Assembly：
1) You can complete the set up in six different ways.
2) The installation must be solid and reliable.
3) Make sure to examine the connection between your motor and the worm equipment reducer.
4) You must make use of flexible cables and wiring for a manual installation.
By using the most advanced science and drive technology, we’ve developed several unique “square package” 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 definitely a standard worm gearbox with a bronze worm equipment and a worm. Our Helical gearbox product line consists of four universal series (R/S/K/F) and a step-less quickness 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 double shaft for double-sided result or a cover for the brief shaft end are elective as add-ons. EP gearboxes have a high-quality, long-term synthetic lubricant on the basis of polyethylene glycol, and are consequently maintenancefree. They are characterized by high effectiveness and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears aren’t ideal for positioning applications.
Worm Gear applications
Program of worm gears, which is comparable to a standard spur and the worm, which really is a cylindrical gear that resembles a screw, permits smaller gearboxes or planetary drives, whilst retaining torque or power. It’s quite common for worm gears to have got reductions of 20:1, and also up to 300:1 or greater.
Normal gearing includes the initial capability which other gearing components don’t have – the “worm” can effortlessly spin the part, however 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 constantly in place.
Committed to excellence, our employees possess the most important priority satisfying your gear building needs and item improvement.
Also, we consider pride inside our equipment; few producers have the gear to engineer steel parts as exact as we do. Also fewer manufacturing companies have the machining products to check the tolerances we can hold.
Being a gearing producer to Automotive level businesses, with a diverse supply of material types, allow us to achieve the most worm wheel gearbox challenging task requirements. The mixture of robust materials, advanced manufacturer systems, reliability and our commitment to customer satisfaction makes us a high supplier in advanced gearing and shafting products.
Our gear manufacturing places have over twenty years of worm gear design knowledge, gained through many projects that included varied sizes of custom made worm gears to print requirements.