This gearbox utilizes a 30:1 ratio worm-drive reduction for applications that want extremely slow and worm wheel gearbox 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 is not applied. The precision floor 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 aluminium structure offers a rigid framework without adding unnecessary weight and can be 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 (electric motor marketed separately). The Vertical Shaft Worm-Drive Gearbox is perfect for turn-tables, time-lapse systems and low-velocity applications that want 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 ten minutes per rotation (at max speed)
Dimensions 3.43″ x 1.93″
Item 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 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 design of gearbox, material selection to production 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 could be made on brief notice by customer.
Worm gearboxes are having 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 equipment boxes possess liberal ribbing for increasing warmth dissipation area, streamlined sump for carrying more oil and fan of ample size which works well in both aspect of rotation.
Design Standards:
Wherever applicable, British as well as Indian Design standards are used. Worm Shafts comply with case- hardening Alloy Steels, Worm Wheels conform to 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 rate reduction ratios with only one equipment pairing in a far more compact space when compared with other styles of gears. You can expect up to a maximum ratio of 100:1 with this products. Another advantage of the Worm and Wheel equipment pairings may be the low level sound they produce. Some drawbacks are the general low effectiveness 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 area has been achieved by work hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms because of reality that the metallic fibrous framework is not cut.
2) The top hardness after chilly 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) Cool rolled worms are ideal for miniature equipment applications since this is often rotated smoothly without damaging the worm wheels made out of POM or additional soft materials.
4) Due to the implementation of the 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 give a smooth operation and long-term durability.
Worm gears are made of a worm and a equipment (sometimes referred to as a worm wheel), with nonparallel, non-intersecting shafts oriented 90 degrees to each other. The worm can be analogous to a screw with a V-type thread, and the gear can be analogous to a spur gear. The worm is normally the driving component, with the worm’s thread advancing one’s teeth of the gear.
Such as a ball screw, the worm in a worm gear might 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 convert (360 degrees) of the worm advances the gear by one tooth. So a gear with 24 teeth provides a gear reduced amount of 24:1. For a multi-begin worm, the gear reduction equals the number 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 a mixture 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. In order to minimize friction (and therefore, high temperature), the worm and equipment are constructed with dissimilar metals – for example, the worm could 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 usage of dissimilar metals for the worm and gear also plays a part in quiet procedure.) This makes worm gears suitable for use where sound should be minimized, such as for example in elevators. In addition, the use of a softer materials for the gear means that it can absorb shock loads, like those skilled in heavy equipment or crushing devices.
The primary advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They may also be utilized as speed reducers in low- to medium-swiftness applications. And, because their reduction ratio is founded on the amount of gear teeth only, they are smaller sized than other types of gears. Like fine-pitch business 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 an effective answer for power tranny applications requiring high-ratio rate reduction in a limited space using correct angle (90°), nonintersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest type of gearing.
Because the effectiveness of a worm equipment drive depends upon the lead angle and quantity of starts on the worm – and because increased effectiveness is always an objective, the ratio ought to be kept only possible. To run properly, worms and worm gears used together must have the same diametral pitch and threads.
Our complete line of worms and worm gears can be ordered through the EP Equipment Guaranteed Same Time Shipment Program for the quickest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power transmission needs.
Our worm gears offer the 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 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. However, there exists a low transmission effectiveness problem in the event that you don’t know the how to choose the worm gearbox. 3 basic indicate choose high worm gear efficiency that you need to know:
1) Helix position. The worm gear drive efficiency mostly rely on the helix angle of the worm. Generally, multiple thread worms and gears is more efficient than solitary thread worms. Proper thread worms can increase efficiency.
2) Lubrication. To choose a brand lubricating oil can be an essential factor to improve worm gearbox performance. As the proper lubrication can decrease worm equipment action friction and temperature.
3) Materials selection and Gear Manufacturing Technology. For worm shaft, the material should be hardened metal. The worm gear materials ought to be aluminium bronze. By reducing the worm gear hardness, the friction on the worm teeth is decreased. In worm production, to use the specialized machine for gear slicing and tooth grinding of worms can also increase worm gearbox efficiency.
From a sizable transmission gearbox power 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 Package Assembly：
1) You can complete the installation in six different ways.
2) The installation should be solid and reliable.
3) Make sure to check the connection between your engine and the worm gear 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’ve 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, correct angle gearbox. An NMRV series gearbox is usually a typical 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 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 dual 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 synthetic lubricant on the basis of polyethylene glycol, and so are consequently 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
Program of worm gears, which is comparable to a standard spur and the worm, which really is a cylindrical gear that resembles a screw, permits smaller gearboxes or planetary drives, whilst retaining torque or power. It’s quite common for worm gears to have got reductions of 20:1, and even up to 300:1 or greater.
Normal gearing includes the unique capability which various other gearing components do not have – the “worm” can effortlessly spin the part, however the “gears” cannot 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.
Focused on excellence, our employees possess the most crucial priority satisfying your gear building needs and product improvement.
Also, we consider pride in our equipment; few producers have the equipment to engineer metallic parts as specific as we do. Also fewer manufacturing businesses have the machining equipment to check on the tolerances we can hold.
Being a gearing producer to Automotive level businesses, with a diverse way to obtain material types, allow us to attain the most challenging task requirements. The mixture of robust materials, advanced manufacturer technology, reliability and our commitment to client satisfaction makes us a top provider in advanced gearing and shafting products.
Our gear manufacturing locations have over two decades of worm gear design knowledge, gained through many projects that included varied sizes of customized worm gears to print requirements.