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 posture can be kept even when power isn’t applied. The precision ground 3/8” stainless steel result shaft is backed by dual 3/8” ABEC 5 ball bearings to aid a load from any orientation. The ¼” ABS plastic and light weight aluminum structure provides 
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 (motor offered separately). The Vertical Shaft Worm-Drive Gearbox is ideal for turn-tables, time-lapse systems and low-acceleration applications that require high precision and torque.
Motor RPM required = 1 / (a few minutes per rotation desired / 30)
Example: 1 / (10 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 gives 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 production of worm gears in gearboxes. Right from the design of gearbox, worm wheel gearbox materials selection to manufacturing practice of worm gear 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
Center 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 usually 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 Metal, duly hardened and tempered. The worm wheel is made from Chill Cast Phosphorous Bronze.
Ever-Power worm equipment boxes possess liberal ribbing for increasing high temperature dissipation area, streamlined sump for carrying more oil and enthusiast of ample size which is effective in both aspect of rotation.
Design Standards:
Wherever applicable, British along with 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. Quality 20, IS210.
High reduction gear
Worm and wheel equipment pairings provide large velocity reduction ratios with only 1 gear pairing in a far more compact space in comparison to other types of gears. We offer 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 will be the general low efficiency and the actual fact that they generate warmth.
Advantage of EP’s Worm Gears – “Chilly rolled Worm Gears”
1) The hardness of the helicoid surface has been achieved by work hardening when the chilly rolling was performed, providing Worm gears with better mechanical properties than machined worms because of reality that the metallic fibrous structure has not been cut.
2) The surface hardness after cool rolling is increased by 1.2 to 1 1.3 times in comparison to the hardness of the original materials, and the hardness of the helicoid surface increases to around HB240 to 260.
3) Chilly rolled worms are ideal for miniature equipment applications since this is often rotated smoothly without damaging the worm wheels made out of POM or other soft materials.
4) Due to the implementation of this cold rolling method, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes out with a mirror like finish. Thus, EP-Precision Chilly Rolled Worms provide a smooth procedure and long term durability.
Worm gears are constructed of a worm and a gear (sometimes known as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 degrees to one another. The worm is definitely analogous to a screw with a V-type thread, and the gear is analogous to a spur gear. The worm is typically the driving 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 – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each complete change (360 degrees) of the worm increases the equipment by one tooth. So a gear with 24 teeth provides 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 starts on the worm. (This is different from most other types of gears, where in fact the gear reduction is definitely 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 actions causes friction and heat, which limits the efficiency of worm gears to 30 to 50 percent. To be able to minimize friction (and for that reason, high 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 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 suitable for use where sound should be minimized, such as in elevators. In addition, the use of a softer materials for the gear means that it can absorb shock loads, like those experienced in weighty equipment or crushing machines.
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 acceleration reducers in low- to medium-acceleration applications. And, because their reduction ratio is founded on the amount of gear teeth only, they are smaller sized than other styles of gears. Like fine-pitch lead screws, worm gears are typically self-locking, which makes them well suited 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 limited space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest kind of gearing.
Because the effectiveness of a worm gear drive depends on the business lead angle and quantity of starts on the worm – and because increased effectiveness is always an objective, the ratio should be kept as low as possible. To run properly, worms and worm gears used together will need to have the same diametral pitch and threads.
Our complete type of worms and worm gears can be ordered through the EP Gear Guaranteed Same Day time Shipment Program for the quickest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmitting needs.
Our worm gears offer the smoothest, quietest form of gearing.
They offer high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by reducing ratios.
With some ratios, there is level of resistance to back driving.
Offered from 48 DP to 3 DP
Stocked as single, dual and quad start configurations
How exactly to Select High Efficient Worm Gearbox?
The worm gear manufacturing process can be relatively simple. However, there is a low transmission effectiveness problem if you don’t understand the how to choose the worm gearbox. 3 basic indicate choose high worm gear efficiency that you need to know:
1) Helix angle. The worm equipment 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 performance.
2) Lubrication. To choose a brand lubricating essential oil can be an essential factor to boost worm gearbox efficiency. As the correct lubrication can reduce 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 material ought to be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm tooth is reduced. In worm production, to use the specialized machine for gear reducing and tooth grinding of worms also can increase worm gearbox efficiency.
From a large transmission gearbox power to a straight small worm gearbox load, you can choose one from an array of worm reducer that precisely fits your application requirements.
Worm Gear Box Assembly：
1) You can complete the set up in six various ways.
2) The installation must be solid and reliable.
3) Make sure to verify the connection between the motor and the worm gear reducer.
4) You must use flexible cables and wiring for a manual set up.
With the help of the most advanced science and drive technology, we have developed several unique “square box” 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 is definitely a typical worm gearbox with a bronze worm equipment and a worm. Our Helical gearbox products comprises of four universal series (R/S/K/F) and a step-less speed 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 short shaft end are elective as components. EP gearboxes come with a high-quality, long-term synthetic lubricant based on polyethylene glycol, and so are consequently maintenancefree. They are characterized by high performance and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears aren’t ideal for positioning applications.
Worm Gear applications
Application of worm gears, which is similar 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 possess reductions of 20:1, and also up to 300:1 or greater.
Typical gearing includes the initial capability which other gearing components do not have – the “worm” can effortlessly spin the part, but 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 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 carefully the zone stuck constantly in place.
Committed to excellence, our employees have the most important priority satisfying your equipment building needs and product improvement.
Also, we consider pride in our equipment; few producers have the equipment to engineer metal parts as exact as we do. Also fewer manufacturing businesses have the machining gear to check the tolerances we can hold.
Being a gearing manufacturer to Automotive level companies, with a diverse way to obtain material types, allow us to achieve the most challenging project requirements. The combination of robust components, advanced manufacturer technologies, reliability and our dedication to customer satisfaction makes us a high supplier in advanced gearing and shafting products.
Our gear manufacturing places have over two decades of worm gear design expertise, gained through many projects that included varied sizes of custom worm gears to print requirements.