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June 10, 2020

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 extremely compact frames. Three gear ratios are available to meet the requirements of your specific application.
Order the Ever-Power RW Series worm gear box assembly you need, ask for a quote, or contact us for more information.
Worm Wheel Miniature Gearboxes
Our RW series miniature worm equipment box assembly could be little, but it’s challenging enough to handle demanding power transfer applications. Constructed with machined aluminium housings and hardened metal input and result gears, they’ll deliver many years of reliable performance.
Obtainable in three standard output ratios and with two result shaft diameter options, it’s easy to find the Ever-Power right miniature gearbox to your requirements. Each RW model worm equipment container assembly provides proportionally high torque values (1.4 NM at 3,000 RPM) with very low backlash (maximum 2° backlash).
For full specifications and Dimensional Parametric Search, see individual product listings.
The Ever-Power Advantage
High efficiency miniature right 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 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 based on application. Also speed is increased or reduced 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 needed to build them, in an array of regular ratios and shaft options and also custom designs.
Helical, bevel, and miter gear boxes provide options of rate reducers or swiftness increasers, and may be driven in either path. All Ever-Power worm gear speed reducers and right angle drives are manufactured for powerful in a large spectrum of applications. Typically worm gear boxes are not used as acceleration increasers. The instances are molded glass-filled materials making them extremely durable and resistant to corrosive conditions. They can be found in an array of ratios and are equipped with right hand or left hand worm gears. The result shafts could be solid or hollow, and load capacity is unaffected by direction and rotation.
Worm gear speed reducers are made up of a screw (the worm) that drives a wheel (helical gear) or single enveloping wheel and are found in mechanical applications ranging from conveyors to exercise devices to robots.
Geneva mechanisms and assemblies are usually 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 step and a blocking disc that locks the driven wheel constantly in place 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 due to the very smooth running of the worm equipment combined with the utilization of cast iron and high precision on element manufacturing and assembly. Regarding the our precision gearboxes, we take extra treatment of any sound which can be interpreted as a murmur from the apparatus. So the general noise degree 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 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 edge for incorporation into constructions.
Strong bearings in solid housing
The output shaft of the BJ worm gearbox is quite firmly embedded in the apparatus house and is well suited for immediate suspension for wheels, movable arms and other parts rather than needing 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 security. Also spindle gearboxes with a trapezoidal spindle are self-locking, making them well suited 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 made from GG-25 cast-iron, and are available for all sorts of gear-reducer. This make sure they are perform efficiently under stressed conditions, vibrations or any kind of setback that cannot be avoided through the assembly
The worm-gear is constructed 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 efficiency 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, 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 out there.
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 result, bears better axial loads that its analogous one in the MF-62 series. The rest 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 taken into account:
It must be fixed on a set 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 should be covered to avoid them from drying and losing their seal.
The device work of the fittings set up in the output shafts require an ISO H7 or h6 margin for the hollow shaft.
Backdriving
It is wise to focus on this factor when the gear reducer output shaft is driven instead of being a driver. Considering that one of the features of this worm-gear reducer is the fact that can’t be axle-powered by the output shaft (irreversibility), it is almost impossible to meet total irreversibility conditions, due to external elements such as vibrations, etc. This is why, when the application form needs total irreversibility, it really is advisable to make use of exterior brakes with enough capacity to avoid slipping.
It could be said that the conditions under which irreversibility can occur are the following:
Efficiency < 0,55 (see table of specialized features).
Maintenance
This kind of gear reducer will get a permanent lubrication, so it really does not need any kind 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 is not needed.

High reduction gear
Worm and wheel gear pairings provide large speed decrease ratios with only 1 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 advantage of the Worm and Wheel gear pairings is the low level sound they produce. Some drawbacks are the general low efficiency and the actual fact that they generate warmth.

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

2) The top hardness after chilly rolling is increased by 1.2 to at least one 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) Frosty rolled worms are suitable for miniature gear applications since this can be rotated smoothly without damaging the worm wheels made out of POM or additional soft materials.

4) Due to the implementation of the cold rolling method, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes out with a mirror like complete. Thus, EP-Precision Cold 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 each other. The worm is definitely analogous to a screw with a V-type thread, and the gear is usually analogous to a spur gear. The worm is normally the traveling component, with the worm’s thread advancing the teeth of the gear.

Like a ball screw, the worm in a worm gear might have a single start or multiple starts – and therefore there are multiple threads, or helicies, on the worm. For a single-start worm, each full change (360 degrees) of the worm increases the gear by one tooth. So a gear with 24 teeth will provide a gear reduced amount of 24:1. For a multi-start worm, the gear reduction equals the number of teeth on the apparatus, divided by the number of begins on the worm. (This is not the same as almost every other types of gears, where in fact the gear reduction is 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 actions causes friction and heat, which limits the efficiency of worm gears to 30 to 50 percent. In order to minimize friction (and for that reason, heat), the worm and gear are constructed with dissimilar metals – for example, the worm may be produced of hardened steel and the apparatus manufactured from bronze or aluminum.

Although the sliding contact decreases efficiency, it provides extremely quiet operation. (The utilization of dissimilar metals for the worm and gear also contributes to quiet procedure.) 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 can absorb shock loads, like those experienced in large equipment or crushing machines.

The primary advantage of worm gears is their capability to provide high reduction ratios and correspondingly high torque multiplication. They can also be utilized as swiftness reducers in low- to moderate-rate applications. And, because their decrease ratio is based on the number of gear teeth by itself, they are more compact 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 transmitting applications requiring high-ratio rate reduction in a restricted space using correct angle (90°), nonintersecting shafts. When properly used, worms and worm gears provide the smoothest, quietest type 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 efficiency is always an objective, the ratio should be kept only 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 quickest delivery possible.
Product Features
90°, nonintersecting shaft applications solution highly specialized power transmitting needs.
Our worm gears provide smoothest, quietest type of gearing.
They offer high-ratio speed decrease in minimal spaces.
Their efficiency is easily increased by lowering 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