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-driving the gearmotor so a posture can be held even when power isn’t applied. The precision floor 3/8” stainless steel output 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 offers a rigid framework without adding unnecessary weight and is usually easily mounted to any flat work surface by utilizing the base mounting tabs. Our Regular 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-speed applications that require 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 10 minutes per rotation (in 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 range of standard, non standard and customised worm gearbox and worm gear motor.
Ever-Power maintains the highest level of standard in manufacturing of worm gears in gearboxes. From the look of gearbox, material 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 obtainable 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 of Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes have liberal ribbing for increasing heat dissipation area, streamlined sump to carry more oil and fan of ample size which is effective in both part of rotation.
Design Standards:
Wherever applicable, British in addition to Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels conform to phosphorous-bronze as per BS 1400, While Gear case conforms to C.I. Quality 20, IS210.
High reduction gear
Worm and wheel gear pairings provide large speed decrease ratios with only 1 gear pairing in a more compact space when compared with other types of gears. We offer up to a maximum ratio of 100:1 with this 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 performance and the fact that they 
generate high temperature.
Advantage of EP’s Worm Gears – “Frosty rolled Worm Gears”
1) The hardness of the helicoid surface has been achieved by work 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 cool rolling is increased by 1.2 to at least one 1.3 times in comparison to the hardness of the initial material, and the hardness of the helicoid surface 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 additional soft materials.
4) Because of 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 Cool Rolled Worms provide a smooth operation and long term durability.
Worm gears are constructed of a worm and a gear (sometimes referred to as a worm wheel), with non-parallel, nonintersecting shafts oriented 90 degrees to each other. The worm is analogous to a screw with a V-type thread, and the gear is definitely analogous to a spur gear. The worm is typically the generating component, with the worm’s thread advancing the teeth of the gear.
Such as 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 complete switch (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-start worm, the apparatus reduction equals the amount of teeth on the apparatus, divided by the number of starts on the worm. (This is different from most other types of gears, where the gear reduction is usually 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 temperature, which limits the effectiveness of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, high temperature), the worm and gear are made of dissimilar metals – for example, the worm may be made of hardened metal and the gear manufactured from bronze or aluminum.
Although the sliding contact reduces efficiency, it provides very quiet operation. (The utilization of dissimilar metals for the worm and gear also plays a part in quiet operation.) This makes worm gears ideal for use where sound should be minimized, such as in elevators. In addition, the use of a softer materials for the apparatus means that it could absorb shock loads, like those skilled in large 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 used as rate reducers in low- to medium-acceleration applications. And, because their decrease ratio is founded on the amount 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, making them ideal 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 quickness reduction in a limited space using correct angle (90°), nonintersecting shafts. When properly used, worms and worm gears provide the smoothest, quietest kind of gearing.
Because the efficiency of a worm gear drive depends upon the lead angle and amount of starts on the worm – and because increased effectiveness is always a goal, the ratio ought to be kept only 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 solution highly specialized power transmission 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 lowering ratios.
With some ratios, there is resistance to back driving.
Offered from 48 DP to 3 DP
Stocked as single, double and quad start configurations
How to Select High Efficient Worm Gearbox?
The worm gear manufacturing process is also relatively simple. Nevertheless, there is a low transmission efficiency problem if you don’t know the how to choose the worm gearbox. 3 basic indicate choose high worm equipment efficiency that you need to know:
1) Helix position. The worm equipment drive efficiency mostly rely on the helix angle of the worm. Usually, multiple thread worms and gears is certainly more efficient than solitary thread worms. Proper thread worms can increase performance.
2) Lubrication. To select a brand lubricating oil can be an essential factor to boost worm gearbox effectiveness. As the correct lubrication can decrease worm gear action friction and heat.
3) Materials selection and Gear Manufacturing Technology. For worm shaft, the material ought to be hardened metal. The worm gear material should be aluminium bronze. By reducing the worm equipment hardness, the friction on the worm teeth is reduced. In worm manufacturing, to use the specific machine for gear reducing and tooth grinding of worms also can increase worm gearbox performance.
From a large transmission gearbox capacity to an even small worm gearbox load, you can choose one from an array of worm reducer that precisely suits your application requirements.
Worm Gear Box Assembly：
1) You can complete the installation in six different ways.
2) The installation should be solid and reliable.
3) Ensure that you check the connection between the engine and the worm equipment reducer.
4) You must use flexible cables and wiring for a manual set up.
With the help of the innovative 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 worm wheel gearbox series gearbox is 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 quickness 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 double shaft for double-sided result or a cover for the brief shaft end are optionally available as accessories. EP gearboxes come with a high-quality, long-term synthetic lubricant based on polyethylene glycol, and are therefore maintenancefree. They are seen as a high effectiveness and self-locking.
Please note:
Due to their relatively high backlash (~1-2°), worm gears are not suitable for positioning applications.
Worm Gear applications
Application of worm gears, which is similar to a standard 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’s quite common for worm gears to possess reductions of 20:1, and actually up to 300:1 or greater.
Usual gearing includes the unique capability which various 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 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 important priority satisfying your equipment building needs and item improvement.
Also, we consider pride inside our equipment; few manufacturers have the equipment to engineer steel parts as specific as we do. Also fewer manufacturing companies have the machining apparatus to check on the tolerances we are able to hold.
Being a gearing manufacturer to Automotive level businesses, with a diverse way to obtain material types, allow us to attain the most challenging task requirements. The combination of robust materials, advanced manufacturer systems, reliability and our dedication to customer satisfaction makes us a top supplier in advanced gearing and shafting items.
Our gear manufacturing locations have over twenty years of worm gear design experience, gained through many projects that included varied sizes of custom worm gears to print requirements.