Ever-Power has been developing and manufacturing reliable, high performance gearboxes for over twenty years. RW Series miniature correct angle gearboxes provide high torque ideals with very low backlash in extremely compact frames. Three gear ratios are available to meet the needs of your specific application.
Order the Ever-Power RW Series worm gear box assembly you need, request a quote, or contact us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm gear box assembly could be small, but it’s hard enough to take care of demanding power transfer applications. Constructed with machined aluminum housings and hardened steel input and result 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 simple to find the Ever-Power right miniature gearbox to your requirements. Each RW model worm gear package 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 right 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 maximum)
90° output angle
Maximum input speed: 3,000 RPM
Machined aluminum casing with hardened metal gears and oil-impregnated bronze bearings
Permanently lubricated
Made in the China
Mechanical drives take supplied torque and could increase or reduce that torque predicated on application. Also speed is increased or decreased compared index G – Equipment BOXES – on blue – smallto the speed decrease ratio. Ever-Power has a full type of gearboxes and rate reducers, and the components had a need to build them, in a wide variety of regular ratios and shaft choices along with custom designs.
Helical, bevel, and miter gear boxes provide options of quickness reducers or swiftness increasers, and may be driven in either direction. All Ever-Power worm equipment speed reducers and right angle drives are manufactured for high performance in a large spectrum of applications. Typically worm equipment boxes aren’t used as rate increasers. The cases are molded glass-filled material making them extremely tough and resistant to corrosive conditions. They are offered in a wide range of ratios and are built with right hand or left hand worm gears. The result shafts may be solid or hollow, and load capability is unaffected by direction and rotation.
Worm gear speed reducers are comprised of a screw (the worm) that drives a wheel (helical gear) or single enveloping wheel and so are found in mechanical applications which range from conveyors to workout 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 reaches 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 words of the standard gearboxes of the BJ-Series. Further optimisation can be achieved by using adapted gearboxes or unique gearboxes.
Low noise
Our worm gearboxes and actuators are extremely quiet. This is because of the very smooth running of the worm equipment combined with the use of cast iron and high precision on component manufacturing and assembly. In connection with our precision gearboxes, we consider extra care of any sound which 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 each other. This often proves to be a decisive advantage making the incorporation of the gearbox substantially simpler and more compact.The worm gearbox is an angle gear. This is an advantage for incorporation into constructions.
Solid bearings in solid housing
The output shaft of the BJ worm gearbox is very firmly embedded in the gear 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 equipment ratios,EP-Gear’s worm gearboxes provides a self-locking effect, which in many situations can be utilized as brake or as extra protection. Also spindle gearboxes with a trapezoidal spindle are self-locking, making them well suited 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 kinds of gear-reducer. This make sure they are perform efficiently under stressed conditions, vibrations or any type of setback that cannot be avoided during 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. Due to the mechanical work of these two parts having top quality, excellent performance and low sound amounts have been achived.
The output shaft is hollow, although it is possible to adapt a good shaft.
The oil seals made of 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), provide the best gear reducer in the marketplace.
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 has like reference size 63 and is born like answer to the ask for of our costumers since, upon mounting better bearings in the result, bears higher 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 set up a gear reducer and also to make it work efficiently, the following instructions must be taken into account:
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 suggested to insert compensating couplings, connectors, torque limiters etc…
If the apparatus reducer needed 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 create in the output shafts require an ISO H7 or h6 margin for the hollow shaft.
Backdriving
It is smart to pay attention to this factor when the apparatus reducer result shaft is driven rather than being a driver. Considering that one of the features of this worm-gear reducer may be the fact that can’t be axle-powered by the output shaft (irreversibility), it really is almost difficult to meet total irreversibility conditions, due to external elements such as vibrations, etc. This is why, when the application needs total irreversibility, it really is advisable to make use of exterior brakes with enough power to avoid slipping.
It could be said that the circumstances under which irreversibility can occur are as follows:
• Efficiency < 0,55 (find table of specialized features).
Maintenance
This type of gear reducer will get a permanent lubrication, so that it will 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 that has quality level CLP DIN 51517-3, FGZ level 12, AP GL-4, US 224, AGMA 250-04; for that reason its maintenance isn’t needed.
High reduction gear
Worm and wheel gear pairings provide large velocity decrease ratios with only 1 equipment pairing in a more compact space in comparison to other styles of gears. We offer up to maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel gear pairings is the low level noise they produce. Some drawbacks are the general low efficiency and the fact that they generate warmth.
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 chilly rolling was performed, providing Worm gears with better mechanical properties than machined worms due to fact that the metallic fibrous framework is not cut.
2) The top hardness after frosty rolling is increased by 1.2 to at least one 1.3 times in comparison to the hardness of the original materials, and the hardness of the helicoid surface increases to around HB240 to 260.
3) Chilly 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) Due to the implementation of this cold rolling method, the helicoid surface of EP-Worm (M0.5 to 2.0) comes away with a mirror like complete. Thus, EP-Precision Cold Rolled Worms give a smooth procedure and long term durability.
Worm gears are constructed of a worm and a equipment (sometimes known as a worm wheel), with nonparallel, non-intersecting shafts oriented 90 degrees to one another. The worm is usually analogous to a screw with a V-type thread, and the gear is certainly 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 might have an individual start or multiple starts – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each full turn (360 degrees) of the worm advances the equipment by one tooth. So a gear with 24 teeth will provide a gear reduction of 24:1. For a multi-start worm, the apparatus reduction equals the amount of teeth on the gear, divided by the number of starts on the worm. (That is not the same as most other types of gears, where the gear reduction is certainly a function of the diameters of the two 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 efficiency of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, heat), the worm and equipment are constructed with dissimilar metals – for instance, the worm could be produced of hardened metal and the gear made of bronze or aluminum.
Although the sliding contact reduces efficiency, it provides very quiet operation. (The utilization of dissimilar metals for the worm and equipment also plays a part in quiet operation.) This makes worm gears suitable for use where noise should be minimized, such as in elevators. In addition, the use of a softer material for the gear means that it could absorb shock loads, like those experienced in large equipment or crushing devices.
The primary benefit of worm gears is their ability to provide high reduction ratios and correspondingly high torque multiplication. They may also be used as acceleration reducers in low- to medium-acceleration applications. And, because their decrease ratio is based on the amount of gear teeth alone, they are more compact than other types of gears. Like fine-pitch lead screws, worm gears are usually self-locking, which makes them perfect 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 limited space using right angle (90°), non-intersecting shafts. When properly applied, worms and worm gears supply the smoothest, quietest form of gearing.
Because the efficiency of a worm equipment drive depends upon the lead angle and quantity of begins on the worm – and because increased performance is always an objective, the ratio should be kept as low as possible. To run properly, worms and worm gears used together must have the same diametral pitch and threads.
Our complete type of worms and worm gears can be ordered through the EP Gear Guaranteed Same Day time Shipment Program for the fastest delivery possible.
Product Features
90°, non-intersecting shaft applications answer highly specialized power transmission needs.
Our worm gears offer the smoothest, quietest type of gearing.
They provide high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by reducing ratios.
With some ratios, there is resistance to back driving.
Available from 48 DP to 3 DP
Stocked as single, dual and quad start configurations