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 position can be held even when power isn’t applied. The precision ground 3/8” stainless steel output shaft is supported by dual 3/8” ABEC 5 ball bearings to aid lots from any orientation. The ¼” ABS plastic and aluminium structure offers a rigid framework without adding unnecessary weight and is easily installed to any flat surface by utilizing the bottom mounting tabs. Our Standard Spur Gear motors will work with this gearbox (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 / (minutes per 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 standard and customised worm gearbox and worm equipment motor.
Ever-Power maintains the best degree of standard in manufacturing 
of worm gears in gearboxes. Right from the design of gearbox, material selection to manufacturing 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 often obtainable in stock or can be made on short notice by customer.
Worm gearboxes are having 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 equipment boxes possess liberal ribbing for increasing heat dissipation region, streamlined sump for carrying more oil and fan of ample size which is effective in both side of rotation.
Design Standards:
Wherever applicable, British and also 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 equipment pairings provide large quickness reduction ratios with only 1 gear pairing in a far more compact space when compared with other types of gears. We offer up to a maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel gear pairings may be the low level noise they produce. Some drawbacks will be the general low performance and the actual fact that they generate heat.
Advantage of EP’s Worm Gears – “Cool rolled Worm Gears”
1) The hardness of the helicoid surface area has been attained by work hardening when the frosty rolling was performed, providing Worm gears with better mechanical properties than machined worms because of reality that the metallic fibrous structure is not cut.
2) The top hardness after cold rolling is increased by 1.2 to at least one 1.3 times in comparison to the hardness of the original material, and the hardness of the helicoid surface increases to around HB240 to 260.
3) Chilly rolled worms are suitable for miniature gear applications since this can be rotated smoothly without damaging the worm wheels crafted from POM or 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 Chilly 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 non-parallel, nonintersecting shafts oriented 90 degrees to one another. The worm is definitely analogous to a screw with a V-type thread, and the gear is usually analogous to a spur equipment. The worm is typically the generating component, with the worm’s thread advancing the 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 switch (360 degrees) of the worm advances the gear by one tooth. So a gear with 24 teeth provides a gear reduced worm wheel gearbox amount of 24:1. For a multi-start worm, the gear reduction equals the amount of teeth on the gear, divided by the amount of starts on the worm. (This is different from almost every other types of gears, where in fact the gear reduction is certainly 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 heat, which limits the effectiveness of worm gears to 30 to 50 percent. To be able to minimize friction (and therefore, heat), the worm and equipment are made from dissimilar metals – for instance, the worm could be made of hardened metal and the gear manufactured from 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 operation.) This makes worm gears ideal for use where sound should be minimized, such as for example in elevators. Furthermore, the usage of a softer material for the gear means that it could absorb shock loads, like those skilled in weighty 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 acceleration reducers in low- to medium-swiftness applications. And, because their decrease ratio is based on the amount of gear teeth alone, they are more compact than other styles 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 an effective answer for power tranny applications requiring high-ratio swiftness reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest form of gearing.
Because the efficiency of a worm gear drive depends on the business lead angle and amount of starts on the worm – and because increased efficiency is always a goal, the ratio ought to be kept only possible. To run properly, worms and worm gears used 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 Shipment Plan for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications answer highly specialized power transmission needs.
Our worm gears provide smoothest, quietest kind of gearing.
They offer high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is level of resistance to back driving.
Offered 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. Nevertheless, there exists a low transmission efficiency problem if you don’t understand the how to select the worm gearbox. 3 basic indicate choose high worm equipment efficiency that you should know:
1) Helix angle. The worm equipment drive efficiency mostly depend on the helix position of the worm. Generally, multiple thread worms and gears is more efficient than single thread worms. Proper thread worms can increase effectiveness.
2) Lubrication. To choose a brand lubricating oil is an essential factor to boost worm gearbox performance. As the proper lubrication can decrease worm gear action friction and high temperature.
3) Material selection and Gear Production Technology. For worm shaft, the material should be hardened steel. The worm gear material 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 trimming and tooth grinding of worms can also increase worm gearbox efficiency.
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 fits your application requirements.
Worm Gear Package Assembly：
1) You may complete the set up in six different ways.
2) The installation must be solid and reliable.
3) Make sure to check the connection between the electric motor and the worm gear reducer.
4) You must use flexible cables and wiring for a manual installation.
By using the innovative science and drive technology, we have developed several unique “square box” designed from high-quality aluminium die casting with a beautiful 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 typical 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 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 double shaft for double-sided output 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 so are for that reason maintenancefree. They are characterized by high performance and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears aren’t suitable for positioning applications.
Worm Gear applications
Software of worm gears, which is similar to a standard spur and the worm, which is a cylindrical gear that resembles a screw, allows for smaller gearboxes or planetary drives, whilst retaining torque or power. It is common for worm gears to possess reductions of 20:1, and also up to 300:1 or greater.
Regular gearing includes the initial capability which other gearing components do not have – the “worm” can effortlessly spin the part, however the “gears” cannot maneuver and fully rotate the worm-zone.
What’s the real reason for 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 carefully the zone stuck constantly in place.
Committed to excellence, our employees possess the most crucial priority satisfying your gear building needs and item improvement.
Also, we consider pride in our equipment; few manufacturers have the equipment to engineer metallic parts as precise as we do. Even fewer manufacturing companies have the machining devices to check 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 mixture of robust components, advanced manufacturer systems, reliability and our dedication to client satisfaction makes us a high supplier in advanced gearing and shafting items.
Our gear manufacturing places have over twenty years of worm gear design expertise, gained through many tasks that included varied sizes of customized worm gears to print requirements.