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-generating the gearmotor so a position can be kept even when power isn’t applied. The precision floor 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 aluminium structure offers a rigid framework without adding unnecessary weight and is usually easily installed to any flat surface by utilizing the bottom mounting tabs. Our Standard Spur Gear motors will continue to work with this gearbox (electric motor sold separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-rate 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 needed to achieve 10 minutes per rotation (at max speed)
Dimensions 3.43″ x 1.93″
Product Weight 5.9oz (0.375 lbs)
Output Shaft Diameter 3/8″ (0.375″)
Motor Size Compatibility Regular 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 level of standard in production of worm gears in gearboxes. Right from the look of gearbox, materials selection to manufacturing 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
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 constructed of Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes have liberal ribbing for increasing heat dissipation area, streamlined sump for carrying more oil and fan of ample size which works well in both part of rotation.
Design Standards:
Wherever applicable, British and also Indian Design standards are used. Worm Shafts conform to case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze according to BS 1400, While Gear case conforms to C.I. Grade 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large speed decrease ratios with only one gear pairing in a far more compact space in comparison to other styles of gears. We offer up to a maximum ratio of 100:1 with our products. Another benefit of the Worm and Wheel gear pairings is the low level sound they produce. Some disadvantages are the general low performance and the actual fact that they generate temperature.
Benefit of EP’s Worm Gears – “Cool rolled Worm Gears”
1) The hardness of the helicoid surface area has been achieved by work hardening when the chilly 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 cool rolling is increased by 1.2 to at least one 1.3 times when compared with the hardness of the original material, and the hardness of the helicoid surface area increases to around HB240 to 260.
3) Cool rolled worms are ideal for miniature equipment applications since this is often rotated smoothly without damaging the worm wheels crafted from POM or various other soft materials.
4) Due to the implementation of this 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 Cold Rolled Worms provide a smooth procedure and long term durability.
Worm gears are made of a worm and a gear (sometimes known as a worm wheel), with nonparallel, nonintersecting shafts oriented 90 degrees to one another. The worm can be analogous to a screw with a V-type thread, and the apparatus is certainly analogous to a spur gear. The worm is normally the driving component, with the worm’s thread advancing the teeth of the gear.
Like 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 full turn (360 degrees) of the worm advances the equipment by one tooth. Therefore a gear with 24 teeth will provide a gear reduction of 24:1. For a multi-begin worm, the gear reduction equals the number of teeth on the gear, divided by the number of begins on the worm. (This is different from most other types of gears, where in fact the gear reduction is a function of the diameters of both components.)
The meshing of the worm and the apparatus is an assortment of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and temperature, which limits the effectiveness of worm gears to 30 to 50 percent. To be able to minimize friction (and for that reason, heat), the worm and equipment are made from dissimilar metals – for instance, the worm could be made of hardened steel and the gear manufactured from bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The usage of dissimilar metals for the worm and equipment also contributes to quiet operation.) This makes worm gears ideal for use where noise should be minimized, such as for example in elevators. Furthermore, the use of a softer material for the gear means that it can absorb shock loads, like those experienced in heavy equipment or crushing machines.
The primary advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They may also be used as quickness reducers in low- to medium-velocity applications. And, because their decrease ratio is based on the number of gear teeth alone, they are more compact than other types 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 tranny applications requiring high-ratio quickness reduction in a restricted space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest type of gearing.
Because the performance of a worm equipment drive depends on the lead angle and number of starts on the worm – and because increased efficiency is always an objective, the ratio ought to 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 Time Shipment System for the quickest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power transmission needs.
Our worm gears provide smoothest, quietest type of gearing.
They provide 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 exactly to Select High Efficient Worm Gearbox?
The worm gear production process is also relatively simple. Nevertheless, there exists a low transmission effectiveness problem if you don’t know the how to choose the worm gearbox. 3 basic point to choose high worm gear efficiency that you should know:
1) Helix angle. The worm equipment drive efficiency mostly depend on the helix angle of the worm. Generally, multiple thread worms and gears is usually more efficient than solitary thread worms. Proper thread worms can increase performance.
2) Lubrication. To select a brand lubricating essential oil is an essential factor to improve worm gearbox effectiveness. As the correct 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 metal. The worm gear materials should be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm tooth is reduced. In worm manufacturing, to use the specialized machine for gear trimming and tooth grinding of worms also can increase worm gearbox efficiency.
From a large transmission gearbox capacity 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 Package Assembly：
1) You can complete the installation in six various ways.
2) The installation must be solid and reliable.
3) Ensure that you examine the connection between the motor and the worm equipment 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 package” 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 certainly a standard 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 speed variation UDL series. Their structure and function act like 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 elective as add-ons. EP gearboxes come with a high-quality, long-term synthetic lubricant on the basis of polyethylene glycol, and so are therefore 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
App of worm gears, which is similar to a standard spur and the worm, which is a cylindrical equipment that resembles a screw, allows for smaller gearboxes or planetary drives, while 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.
Usual gearing includes the initial capability which various 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 worm wheel gearbox reason behind this inability to rotate the gear-worm?
The angle is not 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 equipment building needs and item improvement.
Also, we take pride in our equipment; few manufacturers have the gear to engineer metallic parts as exact as we do. Also fewer manufacturing businesses have the machining tools to check on the tolerances we can hold.
Being a gearing manufacturer to Automotive level businesses, with a diverse way to obtain material types, allow us to attain the most challenging project requirements. The combination of robust components, advanced manufacturer systems, reliability and our commitment to customer satisfaction makes us a high provider in advanced gearing and shafting items.
Our gear manufacturing places have over two decades of worm gear style knowledge, gained through many projects that included varied sizes of custom made worm gears to print requirements.