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 posture can be held 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 lots from any orientation. The ¼” ABS plastic and aluminum structure provides a rigid framework without adding unnecessary weight and is easily installed to any flat work surface by utilizing the base 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 want high precision and torque.
Motor RPM required = 1 / (minutes per rotation desired / 30)
Example: 1 / (10 minutes per rotation / 30) = 3 RPM motor had a need to achieve ten 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 selection of standard, non standard and customised worm gearbox and worm gear motor.
Ever-Power maintains the best degree of standard in production of worm gears in gearboxes. Right from the design of gearbox, material selection to manufacturing practice of worm gear box and gear 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 Models like C.D. 50, 60, 75, 85, 100 mm and Ratio 30/1 or 40/1 are often available in stock or could be made on short notice by customer.
Worm gearboxes are having cast iron gear case, worm shaft is of Alloy Steel, duly hardened and tempered. The worm wheel is made from Chill Cast Phosphorous Bronze.
Ever-Power worm gear boxes possess liberal ribbing for increasing warmth dissipation area, streamlined sump for carrying more oil and lover of ample size which is effective in both side of rotation.
Design Standards:
Wherever applicable, British and also 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 swiftness reduction ratios with only one equipment pairing in a more compact space when compared with other types of gears. You can expect up to a 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 disadvantages will be the general low performance and the actual fact that they generate heat.
Advantage of EP’s Worm Gears – “Chilly rolled Worm Gears”
1) The hardness of the helicoid surface area has been attained by work hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms due to reality that the metallic fibrous structure has not been cut.
2) The top hardness after cold 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 area increases to around HB240 to 260.
3) Cool rolled worms are ideal for miniature gear 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 area of EP-Worm (M0.5 to 2.0) comes away with a mirror like finish. Thus, EP-Precision Frosty 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 one another. The worm is certainly analogous to a screw with a V-type thread, and the gear can be analogous to a spur gear. The worm is typically the generating component, with the worm’s thread advancing the teeth of the gear.
Like a ball screw, the worm in a worm gear might have a single start or multiple starts – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each full change (360 degrees) of the worm increases the gear by one tooth. Therefore a gear with 24 teeth provides a gear reduced amount of 24:1. For a multi-begin worm, the gear reduction equals the amount of teeth on the gear, divided by the amount 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 gear is an assortment of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and heat, which limits the efficiency of worm gears to 30 to 50 percent. To be able to minimize friction (and therefore, heat), the worm and gear are made of dissimilar metals – for instance, the worm could be made of hardened metal and the gear manufactured from bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The utilization of dissimilar metals for the worm and equipment also contributes to quiet procedure.) This makes worm gears ideal for use where sound should be minimized, such as for example in elevators. Furthermore, the use of a softer material for the apparatus means that it can absorb shock loads, like those experienced 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 may also be used as speed reducers in low- to medium-swiftness applications. And, because their decrease ratio is based on the number of gear teeth by itself, they are more compact than other types of gears. Like fine-pitch business lead screws, worm gears are typically self-locking, making them perfect for hoisting and lifting applications.
Worms & Worm Gears
EP Gear’s worms and worm gears provide a highly effective answer for power transmission applications requiring high-ratio swiftness reduction in a restricted space using correct angle (90°), non-intersecting shafts. When properly used, worms and worm gears provide the smoothest, quietest kind of gearing.
Because 
the efficiency of a worm gear drive depends on the lead angle and amount of starts on the worm – and because increased efficiency is always a goal, the ratio should be kept only possible. To run correctly, worms and worm gears used together must 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 System for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power transmitting needs.
Our worm gears offer the smoothest, quietest kind of gearing.
They offer 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.
Offered 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 manufacturing process can be relatively simple. However, 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 ought to know:
1) Helix angle. The worm gear drive efficiency mostly depend on the helix angle of the worm. Generally, multiple thread worms and gears can be more efficient than single thread worms. Proper thread worms can increase effectiveness.
2) Lubrication. To select a brand lubricating oil can be an essential factor to improve worm gearbox performance. As the proper lubrication can reduce worm gear action friction and high temperature.
3) Materials selection and Gear Manufacturing 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 decreased. In worm manufacturing, to use the specialized machine for gear slicing and tooth grinding of worms can also increase worm gearbox performance.
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 may complete the set up in six various ways.
2) The installation must be solid and reliable.
3) Make sure to check the connection between the engine and the worm gear reducer.
4) You must make use of flexible cables and wiring for a manual installation.
By using the most advanced science and drive technology, we’ve developed several unique “square box” designed from high-quality aluminium die casting with a beautiful appearance. The modular worm gearbox design series: worm drive gearbox, parallel shaft gearbox, bevel helical gearbox, spiral bevel gearbox, coaxial gearbox, right angle gearbox. An NMRV series gearbox can be 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 velocity 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 double shaft for double-sided output or a cover for the brief shaft end are optionally available as add-ons. EP gearboxes come with a high-quality, long-term worm wheel gearbox synthetic lubricant based on polyethylene glycol, and are for that reason maintenancefree. They are characterized by high efficiency and self-locking.
Please note:
Because of their relatively high backlash (~1-2°), worm gears are not suitable for positioning applications.
Worm Gear applications
Application of worm gears, which is comparable to a standard 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 possess reductions of 20:1, and also up to 300:1 or greater.
Usual gearing includes the initial capability which other gearing components do not have – the “worm” can effortlessly spin the part, but the “gears” cannot maneuver and fully rotate the worm-zone.
What’s the real reason for 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 constantly in place.
Committed to excellence, our employees have the most crucial priority satisfying your gear building needs and product improvement.
Also, we consider pride in our equipment; few producers have the gear to engineer metallic parts as specific as we do. Actually fewer manufacturing companies have the machining products 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 all of us to achieve the most challenging task requirements. The combination of robust materials, advanced manufacturer technology, reliability and our dedication to customer satisfaction makes us a high supplier in advanced gearing and shafting items.
Our gear manufacturing places have over two decades of worm gear design experience, gained through many projects that included varied sizes of custom worm gears to print requirements.