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-traveling the gearmotor so a position can be kept even when power isn’t applied. The precision ground 3/8” stainless steel output shaft is backed by dual 3/8” ABEC 5 ball bearings to aid lots from any orientation. The ¼” ABS plastic and light weight aluminum structure provides a rigid framework without adding unnecessary weight and is definitely easily installed to any flat work surface by utilizing the bottom mounting tabs. Our Standard Spur Gear motors will work with this gearbox (electric motor marketed separately). The Vertical Shaft Worm-Drive Gearbox is perfect for turn-tables, time-lapse systems and low-quickness applications that want high precision and torque.
Motor RPM required = 1 / (minutes per rotation desired / 30)
Example: 1 / (ten minutes per rotation / 30) = 3 RPM motor had a need to achieve ten 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 worm wheel gearbox Compatibility Regular Spur Gear Motors
Ever-Power offers 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 production of worm gears in gearboxes. From the look of gearbox, materials selection to manufacturing practice of worm gear 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
Middle 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 brief notice by customer.
Worm gearboxes are experiencing cast iron equipment case, worm shaft is of Alloy Metal, duly hardened and tempered. The worm wheel is constructed of Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes have liberal ribbing for increasing high temperature dissipation region, streamlined sump for carrying more oil and enthusiast of ample size which is effective in both aspect of rotation.
Design Standards:
Wherever applicable, British as well as Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels conform to phosphorous-bronze according to BS 1400, While Equipment case conforms to C.I. Quality 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large acceleration reduction ratios with only 1 equipment pairing in a more compact space when compared with other types of gears. You can expect up to maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel gear pairings may be the low level sound they produce. Some disadvantages are the general low performance and the actual fact that they generate warmth.
Advantage of EP’s Worm Gears – “Cold rolled Worm Gears”
1) The hardness of the helicoid surface area has been attained by function hardening when the cool rolling was performed, providing Worm gears with better mechanical properties than machined worms because of truth that the metallic fibrous framework is not cut.
2) The surface hardness after cool 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) Cold 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) Due to the implementation of the cold rolling technique, 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 referred to as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 degrees to each other. The worm is certainly analogous to a screw with a V-type thread, and the gear is certainly 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 switch (360 degrees) of the worm increases the equipment by one tooth. So a gear with 24 teeth will provide 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 number of starts on the worm. (That is different from almost every other types of gears, where in fact the gear reduction is 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 action causes friction and high temperature, which limits the performance of worm gears to 30 to 50 percent. To be able to minimize friction (and therefore, high temperature), the worm and equipment are constructed with dissimilar metals – for example, the worm may be made of hardened metal and the gear made of bronze or aluminum.
Although the sliding contact decreases efficiency, it provides extremely quiet operation. (The use 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. In addition, the use of a softer material for the apparatus means that it could absorb shock loads, like those experienced in weighty equipment or crushing devices.
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 quickness reducers in low- to medium-rate applications. And, because their reduction ratio is based on the amount of gear teeth only, they are more compact than other styles of gears. Like fine-pitch lead screws, worm gears are usually self-locking, making them perfect for hoisting and lifting applications.
Worms & Worm Gears
EP Gear’s worms and worm gears provide a highly effective answer for power transmitting applications requiring high-ratio velocity reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest type of gearing.
Because the performance of a worm gear drive depends upon the business lead angle and amount of begins on the worm – and because increased efficiency is always a goal, the ratio should be kept as low as possible. To run properly, worms and worm gears used together must 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 Shipment Program for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications answer highly specialized power transmitting needs.
Our worm gears offer the smoothest, quietest kind of gearing.
They offer high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by lowering 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 is also relatively simple. However, there is a low transmission performance problem in the event that you don’t understand the how to choose the worm gearbox. 3 basic point to choose high worm gear efficiency that you need to know:
1) Helix angle. The worm gear drive efficiency mostly rely on the helix angle of the worm. Usually, multiple thread worms and gears is usually more efficient than solitary thread worms. Proper thread worms can increase effectiveness.
2) Lubrication. To choose a brand lubricating oil can be an essential factor to boost worm gearbox performance. As the correct lubrication can reduce worm equipment action friction and high temperature.
3) Materials selection and Gear Production Technology. For worm shaft, the material should be hardened steel. The worm gear materials 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 slicing and tooth grinding of worms can also increase worm gearbox performance.
From a huge transmission gearbox capacity to an even small worm gearbox load, you can choose one from a wide variety of worm reducer that precisely suits your application requirements.
Worm Gear Box Assembly：
1) You can complete the installation in six various ways.
2) The installation should be solid and reliable.
3) Ensure that you examine the connection between the engine and the worm gear reducer.
4) You must make use of flexible cables and wiring for a manual set up.
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, correct angle gearbox. An NMRV series gearbox can be a standard worm gearbox with a bronze worm gear and a worm. Our Helical gearbox products consists of four universal series (R/S/K/F) and a step-less velocity variation UDL series. Their framework 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 optionally available as add-ons. EP gearboxes have a high-quality, long-term synthetic lubricant based on polyethylene glycol, and so are as a result maintenancefree. They are characterized by 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
Application 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, whilst retaining torque or power. It’s quite common for worm gears to have reductions of 20:1, and even 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, but 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 isn’t 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.
Focused on excellence, our employees possess the most important priority satisfying your equipment building needs and item improvement.
Also, we consider pride inside our equipment; few producers have the gear to engineer metal parts as specific as we do. Even fewer manufacturing companies have the machining apparatus to check on the tolerances we can hold.
Being a gearing producer to Automotive level businesses, 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 top supplier in advanced gearing and shafting products.
Our gear manufacturing locations have over two decades of worm gear design knowledge, gained through many tasks that included varied sizes of custom made worm gears to print requirements.