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 kept even when power is not applied. The precision surface 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 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 (engine 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 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 offers you the widest selection of standard, non standard 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 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
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 can 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 possess liberal ribbing for increasing heat dissipation area, streamlined sump to carry more oil and fan 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 Equipment case conforms to C.I. Grade 20, IS210.
High reduction gear
Worm and wheel gear pairings provide large rate decrease ratios with only one gear pairing in a far more compact space in comparison to other styles of gears. We offer up to maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel equipment pairings is the low level sound they produce. Some drawbacks are the general low effectiveness 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 has been achieved by function hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms due to truth 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 when compared with 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 various other soft materials.
4) Due to the implementation of this cold rolling technique, the helicoid surface 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 gear (sometimes referred to as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 degrees to one another. The worm is certainly analogous to a screw with a V-type thread, and the apparatus is certainly analogous to a spur gear. The worm is typically the traveling component, with the worm’s thread advancing one’s 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 convert (360 degrees) of the worm increases the gear by one tooth. Therefore a gear with 24 teeth will provide 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 in fact the gear reduction is definitely 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 effectiveness of worm gears to 30 to 50 percent. To be able to minimize friction (and therefore, temperature), the worm and gear are constructed with dissimilar metals – for instance, the worm could 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 use of dissimilar metals for the worm and gear also contributes to quiet operation.) This makes worm gears ideal for use where noise should be minimized, such as 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 can also be used as quickness reducers in low- to medium-quickness applications. And, because their decrease ratio is based on the amount of gear teeth by itself, they are more compact than other types of gears. Like fine-pitch business lead screws, worm gears are usually self-locking, which makes them well suited for hoisting and lifting applications.
Worms & Worm Gears
EP Gear’s worms and worm gears provide an effective answer for power transmitting applications requiring high-ratio rate reduction in a restricted space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest form of gearing.
Because the efficiency of a worm equipment drive depends on the lead angle and number of starts on the worm – and because increased performance is always an objective, the ratio should be kept as low as 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 Shipment Program for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications answer highly specialized power transmission needs.
Our worm gears provide smoothest, quietest form 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 exists a low transmission effectiveness problem if you don’t know the how to select the worm gearbox. 3 basic indicate choose high worm equipment 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 one 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 proper lubrication can reduce worm equipment action friction and heat.
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 worm wheel gearbox decreased. In worm manufacturing, to use the specialized machine for gear cutting and tooth grinding of worms can also increase worm gearbox effectiveness.
From a sizable transmission gearbox power to an even small worm gearbox load, you can choose one from a wide selection of worm reducer that precisely fits 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 electric motor 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 have 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 usually a standard worm gearbox with a bronze worm equipment 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 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 have a high-quality, long-term synthetic lubricant on the basis of polyethylene glycol, and are consequently maintenancefree. They are seen as a high efficiency 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 similar to a typical spur and the worm, which is a cylindrical gear that resembles a screw, permits smaller gearboxes or planetary drives, while retaining torque or power. It’s quite common for worm gears to have got reductions of 20:1, and actually up to 300:1 or greater.
Normal gearing includes the initial capability which other gearing components do not 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 constantly in place.
Committed to excellence, our employees possess the most important priority satisfying your gear building needs and item improvement.
Also, we take pride inside our equipment; few producers have the gear to engineer steel parts as precise as we do. Also fewer manufacturing companies have the machining equipment to check on the tolerances we can hold.
Being a gearing manufacturer to Automotive level businesses, with a diverse supply of material types, allow all of us to achieve the most challenging task requirements. The combination of robust materials, advanced manufacturer technologies, reliability and our commitment to customer satisfaction makes us a top supplier in advanced gearing and shafting products.
Our gear manufacturing places have over two decades of worm gear style knowledge, gained through many projects that included varied sizes of customized worm gears to print requirements.