Ever-Power has been developing and manufacturing reliable, powerful gearboxes for over 20 years. RW Series miniature right angle gearboxes offer high torque values with suprisingly low backlash in extremely compact frames. Three equipment ratios are available to meet up the requirements of your unique application.
Order the Ever-Power RW Series worm equipment box assembly you will need, demand a quote, or e mail us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly could be small, but it’s challenging enough to take care of demanding power transfer applications. Constructed with machined aluminum housings and hardened metal input and output gears, they’ll deliver many years of reliable performance.
Obtainable in three standard output ratios and with two output shaft diameter options, it’s easy to find the Ever-Power right miniature gearbox to your requirements. Each RW model worm equipment box assembly provides proportionally high torque ideals (1.4 NM at 3,000 RPM) with suprisingly low backlash (maximum 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 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 maximum)
90° output angle
Maximum input speed: 3,000 RPM
Machined aluminum housing with hardened metal gears and oil-impregnated bronze bearings
Permanently lubricated
Made in the China
Mechanical drives take supplied torque and may increase or reduce that torque predicated on application. Also speed is increased or reduced compared index G – Equipment BOXES – on blue – smallto the speed decrease ratio. Ever-Power includes a full line of gearboxes and acceleration reducers, and the parts had a need to build them, in an array of regular ratios and shaft options along with custom designs.
Helical, bevel, and miter gear boxes offer the options of quickness reducers or swiftness increasers, and could be driven in either direction. All Ever-Power worm gear speed reducers and right angle drives are manufactured 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 material making them extremely rugged and resistant to corrosive environments. They are offered in a wide selection of ratios and are built with right hands or left hands worm gears. The output shafts may be solid or hollow, and load capability is unaffected by direction and rotation.
Worm gear velocity reducers are made up of a screw (the worm) that drives a wheel (helical gear) or one enveloping wheel and are used in mechanical applications ranging from conveyors to physical exercise devices to robots.
Geneva mechanisms and assemblies are typically used to transform continuous rotary movement into intermittent rotary movement. The rotating drive wheel has a pin that gets to into a slot of the driven wheel advancing it by one step and a blocking disc that locks the powered 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 operating of the worm equipment combined with the usage of cast iron and high precision on component manufacturing and assembly. Regarding the our precision gearboxes, we consider extra treatment of any sound that can be interpreted as a murmur from the gear. Therefore the general noise degree of our gearbox is definitely reduced to a complete 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 making the incorporation of the gearbox substantially simpler and smaller sized.The worm gearbox can be 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 very firmly embedded in the gear house and is ideal for direct suspension for wheels, movable arms and other areas rather than needing to create a separate suspension.
Self locking
For larger equipment ratios,EP-Gear’s worm gearboxes provides 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 perfect 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 types of gear-reducer. 
This make them perform effectively under stressed conditions, 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. Due to the mechanical work of the two parts having high quality, excellent overall performance and low sound levels have been achived.
The output shaft is hollow, though it can be done to adapt a good shaft.
The oil seals manufactured from NITRILE BUTADIENE, according to DIN 3760, high 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 provides like reference size 63 and is born like answer to the demand of our costumers since, upon mounting better bearings in the result, bears greater 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 must be fixed on a set surface in order 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 apparatus reducer needed to be painted, the oil seals should be covered to avoid 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 focus on this aspect when the apparatus reducer output shaft is driven rather than being a driver. Bearing in mind that one of the top features of this worm-equipment reducer may be the fact that can’t be axle-powered by the result shaft (irreversibility), it is almost extremely hard to meet up total irreversibility conditions, because of external elements such as vibrations, etc. This is why, when the application needs total irreversibility, it is advisable to utilize external brakes with enough capacity to avoid slipping.
It may be said that the circumstances under which irreversibility can occur are the following:
• Efficiency < 0,55 (find table of specialized features).
Maintenance
This kind of gear reducer is provided with a permanent lubrication, so it will not need any kind of maintenance.
Lubrication
The lubrication of this gear reducer type is continuous and comes as standard, with top quality refined oil which has antirust and antiwear products with Fe, Cu and alloy protectors that has level of quality 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 reduction ratios with only one equipment pairing in a far more compact space when compared with other types 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 disadvantages will be the general low effectiveness and the actual fact that they generate high temperature.
Advantage of EP’s Worm Gears – “Frosty rolled Worm Gears”
1) The hardness of the helicoid surface has been attained by function hardening when the cold rolling was performed, providing Worm gears with better mechanical properties than machined worms due to reality that the metallic fibrous structure has not been cut.
2) The top hardness after cold rolling is increased by 1.2 to 1 1.3 times when compared with the hardness of the original materials, and the hardness of the helicoid surface area increases to around HB240 to 260.
3) Cold rolled worms are ideal for miniature equipment applications since this can be rotated smoothly without damaging the worm wheels crafted from POM or other soft materials.
4) Because of the implementation of the cold rolling method, the helicoid surface of EP-Worm (M0.5 to 2.0) comes out with a mirror like complete. Thus, EP-Precision Chilly Rolled Worms provide a smooth procedure and long term durability.
Worm gears are made of a worm and a equipment (sometimes known as a worm wheel), with nonparallel, nonintersecting shafts oriented 90 degrees to each other. The worm is definitely analogous to a screw with a V-type thread, and the apparatus can be analogous to a spur equipment. The worm is normally the traveling component, with the worm’s thread advancing one’s 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 turn (360 degrees) of the worm advances the gear by one tooth. So a gear with 24 teeth will provide 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 starts on the worm. (This is different from most other types of gears, where in fact the gear reduction is certainly a function of the diameters of both components.)
The meshing of the worm and the apparatus 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 efficiency of worm gears to 30 to 50 percent. In order to minimize friction (and for that reason, temperature), the worm and gear are made from dissimilar metals – for example, the worm could be made of hardened metal and the apparatus made of bronze or aluminum.
Although the sliding contact decreases efficiency, it provides very quiet operation. (The use of dissimilar metals for the worm and gear also plays a part in quiet operation.) This makes worm gears suitable for use where noise should be minimized, such as for example in elevators. Furthermore, the use of a softer material for the gear implies that it could absorb shock loads, like those skilled in large 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 utilized as velocity reducers in low- to medium-swiftness applications. And, because their decrease ratio is based on the amount of gear teeth by itself, they are more compact than other styles of gears. Like fine-pitch lead screws, worm gears are usually self-locking, making them perfect for hoisting and lifting applications.
Worms & Worm Gears
EP Gear’s worms and worm gears provide a highly effective answer for power transmission applications requiring high-ratio velocity reduction in a limited space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest type of gearing.
Because the performance of a worm equipment drive depends upon the lead angle and number of begins on the worm – and because increased effectiveness is always an objective, the ratio ought to be kept as low as possible. To run correctly, worms and worm gears utilized together will need to have the same diametral pitch and threads.
Our complete line of worms and worm gears could be ordered through the EP Gear Guaranteed Same Day Shipment Plan 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 decrease in minimal spaces.
Their efficiency is easily increased by decreasing ratios.
With some ratios, there is level of resistance to back driving.
Obtainable from 48 DP to 3 DP
Stocked as single, dual and quad start configurations