Ever-Power has been developing and manufacturing reliable, powerful gearboxes for over 20 years. RW Series miniature right angle gearboxes offer high torque ideals with suprisingly low backlash in extremely compact frames. Three gear ratios are available to meet the needs of your unique application.
Order the Ever-Power RW Series worm equipment box assembly you need, request a quote, or e mail us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly may be small, but it’s tough enough to handle demanding power transfer applications. Constructed with machined aluminium housings and hardened steel input and result gears, they’ll deliver a long time of reliable performance.
Available in three standard output ratios and with two output shaft diameter options, it’s easy to find the Ever-Power right miniature gearbox for your needs. Each RW model worm equipment box assembly provides proportionally high torque values (1.4 NM at 3,000 RPM) with suprisingly low backlash (optimum 2° backlash).
For full specs and Dimensional Parametric Search, see individual item listings.
The Ever-Power Advantage
High efficiency miniature correct angle gearbox (up to 90% at 1,000 RPM)
Three gear 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
Made in the China
Mechanical drives take supplied torque and may increase or reduce that torque based on application. Also speed is increased or decreased in proportion index G – Equipment BOXES – on blue – smallto the speed decrease ratio. Ever-Power includes a full type of gearboxes and swiftness reducers, and the elements needed to build them, in an array of regular ratios and shaft choices in addition to custom designs.
Helical, bevel, and miter gear boxes offer the options of acceleration reducers or quickness increasers, and could be powered in either direction. All Ever-Power worm gear speed reducers and correct angle drives are produced for high performance in a large spectrum of applications. Typically worm gear boxes aren’t used as velocity increasers. The cases are molded glass-filled material making them extremely tough and resistant to corrosive environments. They are offered in an array of ratios and are equipped with right hands or left hand worm gears. The result shafts may be solid or hollow, and load capability is unaffected by path 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 used 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 has a pin that gets to right 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 one of the key words of the typical gearboxes of the BJ-Series. Further optimisation may be accomplished through the use of adapted gearboxes or unique gearboxes.
Low noise
Our worm gearboxes and actuators are really quiet. This is because of the very smooth running of the worm equipment combined with the usage of cast iron and high precision on component manufacturing and assembly. In connection with our precision gearboxes, we take extra care of any sound which can be interpreted as a murmur from the gear. So the general noise level of our gearbox is definitely reduced to an absolute minimum.
Angle gearboxes
On the worm gearbox the input shaft and output shaft are perpendicular to one another. This often proves to become a decisive advantage producing the incorporation of the gearbox considerably simpler and more compact.The worm gearbox is an angle gear. This is an edge for incorporation into constructions.
Solid bearings in solid housing
The output shaft of the BJ worm gearbox is quite firmly embedded in the apparatus house and is perfect for direct suspension for wheels, movable arms and other areas rather than having to build a separate suspension.
Self locking
For larger gear ratios,EP-Gear’s worm gearboxes provides a self-locking impact, which in many circumstances can be utilized as brake or as extra security. Also spindle gearboxes with a trapezoidal spindle are self-locking, making them perfect for a wide range 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 kind of setback that can’t be avoided through the assembly
The worm-gear is made from hardened and quench-hardened steel, with ground- on teeth sides, and the crowns made of DIN (GZ-CuSn 12 Ni2) centricast bronze, melted on steel. Because of the mechanical work of these two parts having high quality, excellent functionality and low noise amounts have been achived.
The output shaft is hollow, though it can be done to adapt a solid 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), supply the most competitive 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 offers like reference size 63 and exists like answer to the request of our costumers since, upon mounting greater bearings in the output, bears better axial loads that its analogous one in the MF-62 series. The others of technical characteristic are identical to the its analogous in the size 62.
Assembly Position
In order to set up a gear reducer and also to make it happen efficiently, the following instructions must be taken into account:
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 suggested to insert compensating couplings, connectors, torque limiters etc…
If the gear reducer needed to be painted, the oil seals must be covered to prevent them from drying and losing their seal.
The machine work of the fittings setup in the output shafts require an ISO H7 or h6 margin for the hollow shaft.
Backdriving
It is smart to pay attention to this aspect when the apparatus reducer output shaft is driven instead of being a driver. Bearing in mind that one of the features of this worm-equipment reducer may be the fact that cannot be axle-powered by the output shaft (irreversibility), it is almost unattainable to meet total irreversibility conditions, due to external factors such as for example vibrations, etc. This is why, when the application form needs total irreversibility, it is advisable to make use of exterior brakes with enough power to avoid slipping.
It may be said that the conditions under which irreversibility can occur are the following:
• Efficiency < 0,55 (observe table of specialized features).
Maintenance
This kind of gear reducer is provided with a permanent lubrication, so it does not need any type of maintenance.
Lubrication
The lubrication of this 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; for that reason its maintenance is not needed.

High reduction gear
Worm and wheel gear pairings provide large acceleration reduction ratios with only 1 equipment pairing in a far more compact space when compared with other types of gears. You can expect up to maximum ratio of 100:1 with this products. Another advantage of the Worm and Wheel gear pairings is the low level noise they produce. Some disadvantages will be the general low efficiency and the fact that they generate temperature.

Advantage of EP’s Worm Gears – “Cold 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 because of fact that the metallic fibrous framework is not cut.

2) The surface hardness after cold rolling is increased by 1.2 to 1 1.3 times when compared with the hardness of the original material, and the hardness of the helicoid surface area increases to around HB240 to 260.

3) Cold rolled worms are suitable for miniature equipment applications since this could be rotated smoothly without damaging the worm wheels crafted from POM or various other soft materials.

4) Because of the implementation of this cold rolling technique, the helicoid surface of EP-Worm (M0.5 to 2.0) comes away with a mirror like finish. Thus, EP-Precision Chilly 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 nonparallel, nonintersecting shafts oriented 90 degrees to one another. The worm can be analogous to a screw with a V-type thread, and the apparatus is usually analogous to a spur gear. The worm is normally the generating component, with the worm’s thread advancing one’s teeth of the gear.

Just like a ball screw, the worm in a worm gear may have an individual start or multiple starts – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each complete switch (360 degrees) of the worm advances the gear by one tooth. Therefore a gear with 24 teeth provides a gear reduction of 24:1. For a multi-start worm, the gear reduction equals the amount of teeth on the gear, divided by the number of starts on the worm. (That is different from most other types of gears, where the gear reduction is definitely 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 high temperature, which limits the performance 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 made of bronze or aluminum.

Although the sliding contact decreases efficiency, it provides extremely quiet operation. (The use of dissimilar metals for the worm and equipment also contributes to quiet operation.) This makes worm gears suitable for use where noise should be minimized, such as for example in elevators. Furthermore, the utilization of a softer material for the gear implies that it could absorb shock loads, like those experienced in weighty equipment or crushing machines.

The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be used as acceleration reducers in low- to medium-speed applications. And, because their reduction ratio is based on the number of gear teeth by itself, they are more compact than other styles of gears. Like fine-pitch business lead screws, worm gears are typically self-locking, which makes 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 swiftness reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest form of gearing.

Because the effectiveness of a worm gear drive depends upon the business lead angle and amount of begins on the worm – and because increased efficiency is always a goal, the ratio should 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 Day Shipment System for the quickest delivery possible.
Product Features
90°, nonintersecting shaft applications answer highly specialized power transmitting needs.
Our worm gears offer the smoothest, quietest form of gearing.
They offer high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by reducing 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