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 merely minimizes backlash but also eliminates back-driving the gearmotor so a position can be kept 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 lots from any orientation. The ¼” ABS plastic and light weight aluminum structure provides a rigid framework without adding unnecessary weight and is usually easily mounted to any flat work surface by utilizing the base mounting tabs. Our Standard Spur Gear motors will continue to work with this gearbox (motor sold separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-acceleration applications that want high precision and torque.
Motor RPM required = 1 / (mins per rotation desired / 30)
Example: 1 / (ten minutes per rotation / 30) = 3 RPM motor had a need 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 Standard Spur Gear Motors
Ever-Power offers you the widest range of standard, non regular 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, materials selection to production practice of worm equipment 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 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 brief notice by customer.
Worm gearboxes are experiencing cast iron gear case, worm shaft is of Alloy Metal, duly hardened and tempered. The worm wheel is made of Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes possess liberal ribbing for increasing warmth dissipation region, streamlined sump for carrying more oil and lover of ample size which is effective in both part of rotation.
Design Standards:
Wherever applicable, British along with Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels comply with phosphorous-bronze according to BS 1400, While Gear case conforms to C.I. Quality 20, IS210.
High reduction gear
Worm and wheel gear pairings provide large speed reduction ratios with only one equipment pairing in a far more compact space when compared with other types of gears. We offer up to maximum ratio of 100:1 with this products. Another advantage of the Worm and Wheel gear pairings may be the low level noise they produce. Some disadvantages are the general low efficiency and the actual fact that they generate heat.
Advantage of EP’s Worm Gears – “Frosty rolled Worm Gears”
1) The hardness of the helicoid surface has been attained by function hardening when the frosty rolling was performed, providing Worm gears with better mechanical properties than machined worms due to truth that the metallic fibrous framework is not cut.
2) The top hardness after cold 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 increases to around HB240 to 260.
3) Frosty rolled worms are ideal for miniature gear applications since this could be rotated smoothly without damaging the worm wheels crafted from POM or other soft materials.
4) Due to the implementation of the cold rolling method, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes away with a mirror like finish. Thus, EP-Precision Chilly Rolled Worms provide a smooth operation and long term durability.
Worm gears are constructed of a worm and a gear (sometimes known as a worm wheel), with non-parallel, nonintersecting 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 gear. The worm is typically the driving component, with the worm’s thread advancing the teeth of the gear.
Like a ball screw, the worm in a worm gear might have an individual start or multiple starts – meaning that there are multiple threads, or helicies, on the worm. For a single-start worm, each full change (360 degrees) of the worm increases the equipment by one tooth. Therefore a gear with 24 teeth will provide a gear reduction of 24:1. For a multi-start worm, the gear reduction equals the amount of teeth on the apparatus, divided by the amount of starts on the worm. (This is different from most other types of gears, where the gear reduction is a function of the diameters of both components.)
The meshing of the worm and the apparatus 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. In order 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 made of bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The use of dissimilar metals for the worm and equipment also contributes to quiet operation.) This makes worm gears suitable for use where noise should be minimized, such as for example in elevators. Furthermore, the use of a softer materials for the apparatus means that it can absorb shock loads, like those skilled in heavy equipment or crushing devices.
The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as quickness reducers in low- to medium-velocity applications. And, because their reduction ratio is founded on the number of gear teeth only, they are smaller sized than other styles of gears. Like fine-pitch business lead screws, worm gears are typically self-locking, which makes 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 right angle (90°), nonintersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest kind of gearing.
Because the efficiency of a worm equipment drive depends on the lead angle and quantity of starts on the worm – and because increased effectiveness is always a goal, 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 can be ordered through the EP Gear Guaranteed Same Day Shipment Plan for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power tranny needs. 
Our worm gears offer the smoothest, quietest kind of gearing.
They provide 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.
Obtainable 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 is a low transmission effectiveness problem if you don’t know the how to select the worm gearbox. 3 basic point to choose high worm equipment efficiency that you need to know:
1) Helix angle. The worm gear drive efficiency mostly rely on the helix position of the worm. Usually, multiple thread worms and gears is definitely more efficient than one thread worms. Proper thread worms can increase efficiency.
2) Lubrication. To select a brand lubricating oil is an essential factor to boost worm gearbox performance. As the correct lubrication can reduce worm gear action friction and heat.
3) Materials selection and Gear Manufacturing Technology. For worm shaft, the material should be hardened metal. The worm gear material should be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm tooth is decreased. In worm production, to use the specific machine for gear reducing and tooth grinding of worms also can increase worm gearbox effectiveness.
From a big transmission gearbox power to an even small worm gearbox load, you can choose one from a wide range of worm reducer that precisely suits your application requirements.
Worm Gear Container Assembly：
1) You may complete the set up in six different ways.
2) The installation must be solid and reliable.
3) Make sure to verify the connection between your engine and the worm equipment 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 worm wheel gearbox developed several unique “square container” designed from high-quality aluminium die casting with a lovely appearance. The modular worm gearbox design series: worm drive gearbox, parallel shaft gearbox, bevel helical gearbox, spiral bevel gearbox, coaxial gearbox, correct 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 consists of four universal series (R/S/K/F) and a step-less rate 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 result or a cover for the brief shaft end are elective as components. EP gearboxes come with a high-quality, long-term synthetic lubricant based on polyethylene glycol, and are therefore maintenancefree. They are characterized by high efficiency and self-locking.
Please note:
Because of their relatively high backlash (~1-2°), worm gears aren’t suitable for positioning applications.
Worm Gear applications
Application of worm gears, which is similar to a typical spur and the worm, which really 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 have reductions of 20:1, and actually up to 300:1 or greater.
Common 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 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 the zone stuck constantly in place.
Focused on excellence, our employees possess the most crucial priority satisfying your gear building needs and item improvement.
Also, we take pride inside our equipment; few producers have the equipment to engineer steel parts as specific as we do. Even fewer manufacturing businesses have the machining apparatus to check the tolerances we can hold.
Being a gearing producer to Automotive level companies, with a diverse way to obtain material types, allow all of us to achieve the most challenging project requirements. The combination of robust materials, advanced manufacturer systems, reliability and our dedication to customer satisfaction makes us a high supplier in advanced gearing and shafting items.
Our gear manufacturing locations have over two decades of worm gear design knowledge, gained through many projects that included varied sizes of custom worm gears to print requirements.