Ever-Power has been developing and manufacturing reliable, powerful gearboxes for over twenty years. RW Series miniature correct angle gearboxes offer high torque values with very low backlash in extremely compact frames. Three equipment ratios are available to meet the needs of your unique application.
Order the Ever-Power RW Series worm equipment box assembly you will need, ask for a quote, or e mail us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly may be little, but it’s hard enough to handle demanding power transfer applications. Designed with machined light weight aluminum housings and hardened metal input and result gears, they’ll deliver a long time of reliable performance.
Obtainable in three standard result ratios and with two output shaft diameter options, it’s easy to find the Ever-Power correct miniature gearbox for your needs. Each RW model worm gear package assembly provides proportionally high torque values (1.4 NM at 3,000 RPM) with suprisingly low backlash (maximum 2° backlash).
For full specifications 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 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
Very low backlash (2° backlash optimum)
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 speed is increased or decreased in proportion index G – Equipment BOXES – on blue – smallto the speed reduction ratio. Ever-Power has a full line of gearboxes and acceleration reducers, and the parts had a need to build them, in a wide range of regular ratios and shaft options and also custom designs.
Helical, bevel, and miter gear boxes offer the options of swiftness reducers or quickness increasers, and could be powered in either path. All Ever-Power worm equipment speed reducers and correct angle drives are produced for high performance in a large spectral range of applications. Typically worm gear boxes aren’t used as quickness increasers. The situations are molded glass-filled materials making them extremely rugged and resistant to corrosive conditions. They are offered in an array of ratios and are built with right hands or left hand worm gears. The result shafts could be solid or hollow, and load capacity is unaffected by direction and rotation.
Worm gear swiftness reducers are made up of a screw (the worm) that drives a wheel (helical gear) or one enveloping wheel and are found in mechanical applications ranging from conveyors to workout devices to robots.
Geneva mechanisms and assemblies are usually used to transform continuous rotary movement into intermittent rotary movement. The rotating drive wheel includes a pin that gets to into a slot of the powered wheel advancing it by one stage and a blocking disc that locks the powered wheel in position between steps.
Compact design
Compact design is one of the key terms of the typical gearboxes of the BJ-Series. Further optimisation can be achieved by using adapted gearboxes or special gearboxes.
Low noise
Our worm gearboxes and actuators are extremely quiet. This is because of the very smooth running of the worm gear combined with the usage of cast iron and high precision on component manufacturing and assembly. Regarding the our precision gearboxes, we consider extra care of any sound that can be interpreted as a murmur from the apparatus. So the general noise level of our gearbox can be reduced to an absolute minimum.
Angle gearboxes
On the worm gearbox the input shaft and output shaft are perpendicular to each other. This often proves to be a decisive advantage making the incorporation of the gearbox considerably simpler and smaller sized.The worm gearbox can be 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 gear house and is ideal for direct 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 effect, which in many situations can be utilized as brake or as extra security. 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 of GG-25 cast-iron, and are available for all types of gear-reducer. This make sure they are perform efficiently under stressed conditions, vibrations or any type of setback that cannot be avoided through the assembly
The worm-gear is made of 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 high quality, excellent performance and low noise levels have been achived.
The output shaft is hollow, although it can be done to adapt a solid shaft.
The oil seals made of 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 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 offers like reference size 63 and is born like response to the demand of our costumers since, upon mounting greater bearings in the output, bears higher 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 create a gear reducer and also to make it happen efficiently, the following instructions must be taken into account:
It must 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 had to be painted, the essential oil seals must 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 factor when the apparatus reducer result shaft is driven instead of being a driver. Bearing in mind that among the features of this worm-gear reducer is the fact that can’t be axle-driven by the output shaft (irreversibility), it is almost impossible to meet up total irreversibility conditions, because of external factors such as for example vibrations, etc. That is why, when the application form needs total irreversibility, it is advisable to utilize external brakes with enough power to avoid slipping.
It could be said that the circumstances under which irreversibility can happen are the following:
• Efficiency < 0,55 (discover table of specialized features).
Maintenance
This sort 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 continuous and comes as standard, with high quality refined oil which has antirust and antiwear products with Fe, Cu and alloy protectors that 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 equipment pairings provide large speed reduction ratios with only one equipment pairing in a far more compact space in comparison to other styles 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 noise they produce. Some disadvantages will be the general low effectiveness and the fact that they generate high temperature.

Advantage of EP’s Worm Gears – “Cold rolled Worm Gears”
1) The hardness of the helicoid surface area has been attained by work hardening when the frosty rolling was performed, providing Worm gears with better mechanical properties than machined worms because of truth that the metallic fibrous framework is not cut.

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

3) Cool rolled worms are suitable for miniature equipment applications since this can be rotated smoothly without damaging the worm wheels made out of POM or various other soft materials.

4) Because of the implementation of the cold rolling method, the helicoid surface area 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 known as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 degrees to each other. The worm is definitely analogous to a screw with a V-type thread, and the gear is certainly analogous to a spur gear. The worm is normally the driving component, with the worm’s thread advancing the teeth of the gear.

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 convert (360 degrees) of the worm increases the equipment by one tooth. Therefore a gear with 24 teeth provides a gear reduction of 24:1. For a multi-begin worm, the gear reduction equals the amount of teeth on the apparatus, divided by the amount of begins on the worm. (This is not the same as most other types of gears, where the gear reduction can be 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 actions causes friction and heat, which limits the efficiency of worm gears to 30 to 50 percent. To be able to minimize friction (and for that reason, temperature), the worm and gear are constructed with dissimilar metals – for example, the worm may be produced of hardened metal and the apparatus manufactured from bronze or aluminum.

Although the sliding contact decreases efficiency, it provides very quiet operation. (The usage of dissimilar metals for the worm and equipment also plays a part in quiet operation.) 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 material for the gear means that it could absorb shock loads, like those experienced in weighty equipment or crushing machines.

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 rate reducers in low- to moderate-rate applications. And, because their reduction ratio is founded on the number of gear teeth alone, they are more compact than other types of gears. Like fine-pitch lead screws, worm gears are typically self-locking, making them well suited 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 swiftness reduction in a restricted space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest type of gearing.

Because the performance of a worm equipment drive depends on the lead angle and number of begins on the worm – and because increased efficiency is always a goal, the ratio should be kept as low as possible. To run properly, worms and worm gears used together will need to have the same diametral pitch and threads.

Our complete type of worms and worm gears can be ordered through the EP Gear Guaranteed Same Time Shipment Program for the quickest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmission needs.
Our worm gears provide smoothest, quietest form 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, double and quad start configurations