Ever-Power has been designing and manufacturing reliable, high performance gearboxes for over twenty years. RW Series miniature right angle gearboxes offer high torque values with suprisingly low backlash in incredibly 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, request a quote, or contact us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly could be little, but it’s difficult enough to take care of demanding power transfer applications. Constructed with machined light weight aluminum housings and hardened metal input and output gears, they’ll deliver a long time of reliable performance.
Obtainable in three standard result ratios and with two result 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 very low backlash (optimum 2° backlash).
For full specs and Dimensional Parametric Search, see individual product 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
Very low backlash (2° backlash optimum)
90° output angle
Maximum input speed: 3,000 RPM
Machined aluminum housing 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 reduced in proportion index G – Equipment BOXES – on blue – smallto the speed reduction ratio. Ever-Power has a full type of gearboxes and speed reducers, and the components had a need to build them, in a wide range of regular ratios and shaft options and also custom designs.
Helical, bevel, and miter equipment boxes offer the options of acceleration reducers or rate increasers, and could be powered in either direction. All Ever-Power worm equipment speed reducers and right angle drives are produced for powerful in a large spectrum of applications. Typically worm gear boxes aren’t used as speed increasers. The situations are molded glass-filled material making them extremely durable and resistant to corrosive environments. They can be found in an array of ratios and are built with right hand or left hand worm gears. The output shafts may be solid or hollow, and load capability is unaffected by path and rotation.
Worm gear quickness 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 which range from conveyors to exercise devices to robots.
Geneva mechanisms and assemblies are typically used to transform continuous rotary motion into intermittent rotary movement. The rotating drive wheel includes 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 among the key phrases of the standard gearboxes of the BJ-Series. Further optimisation may be accomplished through the use of adapted gearboxes or special gearboxes.
Low noise
Our worm gearboxes and actuators are extremely quiet. This is because of the very smooth working of the worm gear combined with the use of cast iron and high precision on element manufacturing and assembly. In connection with our precision gearboxes, we take extra treatment of any sound that can be interpreted as a murmur from the apparatus. So the general noise degree of our gearbox is reduced to a complete minimum.
Angle gearboxes
On the worm gearbox the input shaft and output shaft are perpendicular to one another. This frequently proves to be a decisive advantage producing the incorporation of the gearbox considerably simpler and smaller sized.The worm gearbox is an angle gear. This is often 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 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 gear ratios,EP-Gear’s worm gearboxes will provide a self-locking impact, which in many situations can be used as brake or as extra protection. 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 comprises of three main parts: housing, worm-gear and wheel.
The carcasses are constructed with GG-25 cast-iron, and so are available for all sorts of gear-reducer. This make sure they are perform effectively under stressed circumstances, vibrations or any kind of setback that can’t 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. Because of the mechanical work of the two parts having high quality, excellent functionality 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), provide the most competitive gear reducer available.
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 exists like response to the request of our costumers since, upon mounting higher bearings in the result, bears greater axial loads that its analogous one in the MF-62 series. The others of technical characteristic are similar to the its analogous in the size 62.
Assembly Position
In order to create a gear reducer and to make it work efficiently, the next instructions must be considered:
It must be fixed on a flat surface in order 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 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 gear reducer result shaft is driven instead of being a driver. Bearing in mind that among the top features of this worm-equipment reducer is the fact that cannot be axle-driven by the output shaft (irreversibility), it is almost impossible to meet up total irreversibility conditions, due to external elements such as vibrations, etc. That is why, when the application requires 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 happen are as follows:
• Efficiency < 0,55 (discover table of technical features).
Maintenance
This kind of gear reducer is provided with a permanent lubrication, so that it does not need any kind of maintenance.
Lubrication
The lubrication of this gear reducer type is continuous and comes as standard, with high quality refined oil which includes antirust and antiwear products with Fe, Cu and alloy protectors which has level of quality CLP DIN 51517-3, FGZ level 12, AP GL-4, US 224, AGMA 250-04; because of this its maintenance is not needed.
High reduction gear
Worm and wheel equipment pairings provide large speed decrease ratios with only one gear pairing in a more compact space in comparison to other types of gears. You can expect up to a maximum ratio of 100:1 with this products. Another benefit of the Worm and Wheel equipment pairings is the low level noise they produce. Some disadvantages will be the general low performance and the fact that they generate heat.
Advantage of EP’s Worm Gears – “Cool rolled Worm Gears”
1) The hardness of the helicoid surface area has been achieved by function hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms because of reality that the metallic fibrous structure is not cut.
2) The top hardness after cool rolling is increased by 1.2 to at least one 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 gear applications since this is often rotated smoothly without damaging the worm wheels crafted from POM or additional soft materials.
4) Because of the implementation of this cold rolling method, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes out with a mirror like finish. Thus, EP-Precision Frosty Rolled Worms provide a smooth operation and long-term durability.
Worm gears are made of a worm and a gear (sometimes known as a worm wheel), with non-parallel, non-intersecting shafts oriented 90 degrees to one another. The worm is analogous to a screw with a V-type thread, and the gear is definitely analogous to a spur gear. The worm is normally the driving component, with the worm’s thread advancing the teeth of the gear.
Such as a ball screw, the worm in a worm gear may have an individual start or multiple starts – meaning that there are multiple threads, or helicies, on the worm. For a single-start worm, each complete convert (360 degrees) of the worm advances the equipment 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 amount of teeth on the gear, divided by the amount of starts on the worm. (That is different from almost every other types of gears, where the gear reduction can be a function of the diameters of the two 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 action causes friction and temperature, which limits the performance of worm gears to 30 to 50 percent. To be able to minimize friction (and for that reason, high temperature), the worm and gear are made from dissimilar metals – for instance, the worm may be made of hardened steel and the apparatus manufactured from 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 ideal for use where sound should be minimized, such as in elevators. Furthermore, the use of a softer material for the gear means that it could absorb shock loads, like those skilled in weighty equipment or crushing machines.
The primary advantage of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They can also be utilized as velocity reducers in low- to moderate-rate applications. And, because their decrease ratio is based on the amount of gear teeth by itself, they are smaller sized than other types of gears. Like fine-pitch business 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 an effective answer for power transmission applications requiring high-ratio rate reduction in a restricted space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears provide the smoothest, quietest kind of gearing.
Because the performance of a worm gear drive depends on the business lead angle and number of starts on the worm – and because increased effectiveness is always a goal, the ratio should be kept only possible. To run correctly, worms and worm gears utilized together will need to have the same diametral pitch and threads.
Our complete type of worms and worm gears could be ordered through the EP Equipment Guaranteed Same Day Shipment Plan for the quickest delivery possible.
Product Features
90°, non-intersecting shaft applications solution highly specialized power transmitting needs.
Our worm gears provide smoothest, quietest form of gearing.
They offer high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is resistance to back driving.
Offered from 48 DP to 3 DP
Stocked as single, double and quad start configurations