Ever-Power has been creating and manufacturing reliable, high performance gearboxes for over 20 years. RW Series miniature correct angle gearboxes offer high torque values with suprisingly low backlash in incredibly compact frames. Three gear ratios are available to meet up the needs of your unique application.
Order the Ever-Power RW Series worm gear box assembly you need, ask for a quote, or contact us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly may be little, but it’s tough enough to handle demanding power transfer applications. Designed with machined aluminium housings and hardened steel input and output gears, they’ll deliver a long time of reliable performance.
Available in three standard result ratios and with two result shaft diameter options, it’s easy to find the Ever-Power right miniature gearbox to your requirements. Each RW model worm gear box assembly provides proportionally high torque ideals (1.4 NM at 3,000 RPM) with suprisingly low backlash (maximum 2° backlash).
For full specifications and Dimensional Parametric Search, see individual product listings.
The Ever-Power Advantage
High efficiency miniature right angle gearbox (up to 90% at 1,000 RPM)
Three equipment ratios available: 5:1, 10:1, and 20:1
Extremely compact footprint: 1.5” x 1.5” x 1.08”
12.5 inch-lbs. output torque
Suprisingly low backlash (2° backlash maximum)
90° output angle
Maximum input speed: 3,000 RPM
Machined aluminum casing with hardened steel gears and oil-impregnated bronze bearings
Permanently lubricated
Manufactured in the China
Mechanical drives take supplied torque and may increase or reduce that torque based on application. 
Also swiftness is increased or decreased in proportion index G – GEAR BOXES – on blue – smallto the speed decrease ratio. Ever-Power includes a full line of gearboxes and swiftness reducers, and the elements needed to build them, in an array of standard ratios and shaft options along with custom designs.
Helical, bevel, and miter equipment boxes provide options of speed reducers or acceleration increasers, and may be powered in either direction. All Ever-Power worm equipment speed reducers and correct angle drives are manufactured for high performance in a large spectrum of applications. Typically worm equipment boxes aren’t used as swiftness increasers. The instances are molded glass-filled materials making them extremely durable and resistant to corrosive environments. They are offered in an array of ratios and are built with right hand or left hands worm gears. The result shafts could be solid or hollow, and load capability is unaffected by direction and rotation.
Worm gear acceleration reducers are comprised of a screw (the worm) that drives a wheel (helical gear) or one enveloping wheel and so are found in mechanical applications which range from conveyors to physical exercise devices to robots.
Geneva mechanisms and assemblies are usually used to transform continuous rotary movement into intermittent rotary motion. The rotating drive wheel includes a pin that gets to into a slot of the driven wheel advancing it by one stage and a blocking disc that locks the driven wheel in position between steps.
Compact design
Compact design is among the key terms of the typical gearboxes of the BJ-Series. Further optimisation can be achieved by using adapted gearboxes or particular gearboxes.
Low noise
Our worm gearboxes and actuators are really quiet. This is because of the very smooth operating of the worm equipment combined with the use of cast iron and high precision on component manufacturing and assembly. Regarding the our precision gearboxes, we take extra care of any sound that can be interpreted as a murmur from the gear. Therefore the general noise degree of our gearbox is usually reduced to an absolute minimum.
Angle gearboxes
On the worm gearbox the input shaft and output shaft are perpendicular to each other. This frequently proves to become a decisive advantage making the incorporation of the gearbox substantially simpler and smaller sized.The worm gearbox is an angle gear. This is an advantage for incorporation into constructions.
Strong bearings in solid housing
The output shaft of the BJ worm gearbox is quite firmly embedded in the apparatus house and is ideal for immediate suspension for wheels, movable arms and other parts rather than needing to create a separate suspension.
Self locking
For larger equipment ratios,EP-Gear’s worm gearboxes will provide a self-locking impact, which in many circumstances can be utilized as brake or as extra protection. Also spindle gearboxes with a trapezoidal spindle are self-locking, making them ideal for an array of solutions.
Structural Features
The worm-gear reducer is made up of three main parts: housing, worm-gear and wheel.
The carcasses are made from GG-25 cast-iron, and so are available for all kinds of gear-reducer. This make sure they are perform effectively under stressed conditions, vibrations or any type of setback that can’t be avoided during the assembly
The worm-gear is made from hardened and quench-hardened steel, with ground- on teeth sides, and the crowns manufactured from DIN (GZ-CuSn 12 Ni2) centricast bronze, melted on steel. Due to the mechanical work of the two parts having top quality, excellent performance and low noise levels have been achived.
The output shaft is hollow, although it can be done to adapt a good shaft.
The oil seals manufactured from NITRILE BUTADIENE, according to DIN 3760, top quality bearings, an EPOXY- impregnated finish ( 2 components), and grey-coloured SINGLE LAYER ENAMEL finish ( 2 components) ( RAL 7672), provide the best gear reducer on the market.
Size 63
In the size 62 of the MF series, worm-gear reducers, the output hollow shaft of diameter 30 has been included, that substitutes to the output hollow shaft with diameter 25, from size 62. This variant provides like reference size 63 and is born like answer to the ask for of our costumers since, upon mounting greater bearings in the result, bears higher axial loads that its analogous one in the MF-62 series. The rest of technical feature are similar to the its analogous in the size 62.
Assembly Position
In order to set up a gear reducer and also to make it work efficiently, the following instructions must be considered:
It should be fixed on a flat surface to avoid either vibrations or tensions.
If undistributed loads or continued start-ups are foreseen, it is recommended to insert compensating couplings, connectors, torque limiters etc…
If the gear reducer needed to be painted, the essential oil seals should be covered to prevent them from drying and losing their seal.
The machine work of the fittings set up in the output shafts need an ISO H7 or h6 margin for the hollow shaft.
Backdriving
It is wise to focus on this aspect when the gear reducer result shaft is driven rather than being a driver. Considering that one of the features of this worm-gear reducer is the fact that can’t be axle-powered by the result shaft (irreversibility), it really is almost impossible to meet total irreversibility conditions, because of external factors such as vibrations, etc. For this reason, when the application requires total irreversibility, it is advisable to utilize exterior brakes with enough power to avoid slipping.
It may be said that the circumstances under which irreversibility can happen are the following:
• Efficiency < 0,55 (observe table of specialized features).
Maintenance
This kind of gear reducer will get a permanent lubrication, so it will not need any kind of maintenance.
Lubrication
The lubrication of the gear reducer type is constant and comes as standard, with top quality refined oil which has antirust and antiwear products with Fe, Cu and alloy protectors which has quality level CLP DIN 51517-3, FGZ level 12, AP GL-4, US 224, AGMA 250-04; because of this its maintenance isn’t needed.
High reduction gear
Worm and wheel gear pairings provide large rate decrease ratios with only 1 equipment pairing in a 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 benefit of the Worm and Wheel gear pairings may be the low level noise they produce. Some disadvantages are the general low effectiveness and the 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 achieved by work hardening when the cool 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 frosty rolling is increased by 1.2 to at least one 1.3 times when compared with 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 the cold rolling technique, the helicoid surface of EP-Worm (M0.5 to 2.0) comes away with a mirror like finish. 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 nonparallel, nonintersecting shafts oriented 90 degrees to each other. The worm can be analogous to a screw with a V-type thread, and the apparatus is analogous to a spur equipment. The worm is typically the traveling 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 a single 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 equipment by one tooth. Therefore a gear with 24 teeth will provide a gear reduction of 24:1. For a multi-begin worm, the apparatus reduction equals the amount of teeth on the apparatus, divided by the amount of begins on the worm. (This is different from most other types of gears, where the gear reduction is definitely a function of the diameters of the two 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 temperature, which limits the efficiency of worm gears to 30 to 50 percent. To be able to minimize friction (and therefore, high temperature), the worm and equipment are made from dissimilar metals – for instance, the worm could be produced of hardened metal and the gear manufactured from 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 ideal for use where noise should be minimized, such as for example in elevators. In addition, the use of a softer materials for the gear implies 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 velocity reducers in low- to medium-acceleration applications. And, because their decrease ratio is based on the number of gear teeth only, they are smaller sized than other styles of gears. Like fine-pitch lead screws, worm gears are typically 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 tranny applications requiring high-ratio velocity 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 effectiveness of a worm equipment drive depends on the business lead angle and quantity of begins on the worm – and because increased performance is always a goal, the ratio ought to be kept as low as possible. To run correctly, worms and worm gears utilized together must have the same diametral pitch and threads.
Our complete type of worms and worm gears could be ordered through the EP Gear Guaranteed Same Time Shipment Plan for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmission needs.
Our worm gears provide smoothest, quietest type of gearing.
They provide high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is resistance to back driving.
Obtainable from 48 DP to 3 DP
Stocked as single, dual and quad start configurations