worm gear box assembly

Ever-Power has been designing and manufacturing reliable, high performance gearboxes for over 20 years. RW Series miniature right angle gearboxes offer high torque ideals with very low backlash in extremely compact frames. Three equipment ratios are available to meet up the needs of your specific application.
Order the Ever-Power RW Series worm equipment 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 tough enough to handle demanding power transfer applications. Constructed with machined aluminum housings and hardened metal input and output gears, they’ll deliver a long time of reliable performance.
Obtainable in three standard output ratios and with two output shaft diameter options, it’s simple to find the Ever-Power correct miniature gearbox to your requirements. Each RW model worm equipment container 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 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
Suprisingly low backlash (2° backlash optimum)
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 may increase or reduce that torque based on application. Also quickness is increased or reduced compared index G – GEAR BOXES – on blue – smallto the speed decrease ratio. Ever-Power includes a full type of gearboxes and speed reducers, and the parts had a need to build them, in a wide variety of standard ratios and shaft choices and also custom designs.
Helical, bevel, and miter gear boxes provide options of rate reducers or swiftness increasers, and may be powered in either direction. 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 velocity increasers. The cases are molded glass-filled material making them extremely rugged and resistant to corrosive conditions. They can be found in an array of ratios and are equipped with right hand or left hands worm gears. The result shafts may be solid or hollow, and load capacity is unaffected by path and rotation.
Worm gear velocity reducers are comprised of a screw (the worm) that drives a wheel (helical gear) or solitary enveloping wheel and are found in mechanical applications ranging 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 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 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 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. In connection with our precision gearboxes, we consider extra care of any sound which can be interpreted as a murmur from the apparatus. So the general noise level 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 each other. This often proves to become a decisive advantage producing the incorporation of the gearbox substantially simpler and smaller sized.The worm gearbox is 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 perfect 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 effect, which in many circumstances 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 variety 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 so are available for all types of gear-reducer. This make sure they are perform efficiently under stressed conditions, vibrations or any kind of setback that cannot be avoided during the assembly
The worm-gear is constructed of 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 high quality, excellent functionality and low noise levels have been achived.
The output shaft is hollow, although it is possible 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 most competitive 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 answer to the request of our costumers since, upon mounting higher bearings in the output, bears greater axial loads that its analogous one in the MF-62 series. The others of technical feature are identical to the its analogous in the size 62.
Assembly Position
In order to setup a gear reducer and also to make it work efficiently, the next instructions must be taken into account:
It should 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 oil seals must 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 factor when the gear reducer result shaft is driven rather than being a driver. Considering that one of the top features of this worm-equipment reducer may be the fact that cannot be axle-powered by the result shaft (irreversibility), it is almost unattainable to meet up total irreversibility conditions, due to external factors such as vibrations, etc. For this reason, when the application requires total irreversibility, it is advisable to utilize external brakes with enough power to avoid slipping.
It could be said that the conditions under which irreversibility can happen are as follows:
• Efficiency < 0,55 (find table of technical features).
Maintenance
This sort of gear reducer will get a permanent lubrication, so that it will not need any type of maintenance.
Lubrication
The lubrication of the gear reducer type is constant and comes as standard, with top quality refined oil which includes antirust and antiwear products with Fe, Cu and alloy protectors which 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 equipment pairings provide large quickness reduction ratios with only one gear pairing in a more compact space when compared with other types of gears. You can expect up to maximum ratio of 100:1 with our products. Another advantage of the Worm and Wheel equipment pairings may be the low level noise they produce. Some drawbacks will be the general low efficiency and the fact that they generate heat.

Advantage of EP’s Worm Gears – “Cool rolled Worm Gears”
1) The hardness of the helicoid surface has been achieved by work hardening when the chilly rolling was performed, providing Worm gears with better mechanical properties than machined worms due to reality that the metallic fibrous structure is not cut.

2) The top hardness after chilly rolling is increased by 1.2 to 1 1.3 times in comparison to the hardness of the initial materials, and the hardness of the helicoid surface area increases to around HB240 to 260.

3) Cool rolled worms are ideal for miniature equipment applications since this is often rotated smoothly without damaging the worm wheels crafted from POM or other soft materials.

4) Due to the implementation of this cold rolling technique, the helicoid surface area of EP-Worm (M0.5 to 2.0) comes away 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 equipment (sometimes referred to as a worm wheel), with nonparallel, nonintersecting shafts oriented 90 degrees to one another. The worm is analogous to a screw with a V-type thread, and the apparatus is certainly analogous to a spur equipment. The worm is typically the generating 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 switch (360 degrees) of the worm advances 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 gear, divided by the number of starts on the worm. (This is not the same as almost every other types of gears, where the gear reduction is a function of the diameters of the two components.)
The meshing of the worm and the apparatus is an assortment of sliding and rolling actions, but sliding contact dominates at high reduction ratios. This sliding action causes friction and heat, which limits the performance of worm gears to 30 to 50 percent. In order to minimize friction (and therefore, warmth), the worm and gear are constructed with dissimilar metals – for example, the worm may be made of hardened steel 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 in elevators. Furthermore, the use of a softer material for the gear implies that it could absorb shock loads, like those experienced in large equipment or crushing machines.

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 moderate-speed applications. And, because their reduction ratio is founded on the number of gear teeth only, they are more compact than other styles 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 a highly effective answer for power tranny applications requiring high-ratio speed reduction in a limited 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 gear drive depends on the lead angle and quantity of starts on the worm – and because increased performance is always a goal, the ratio ought to be kept as low as possible. To run properly, worms and worm gears utilized 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 Day Shipment Program for the fastest delivery possible.
Product Features
90°, nonintersecting shaft applications answer highly specialized power transmission needs.
Our worm gears offer the smoothest, quietest form of gearing.
They offer high-ratio speed reduction in minimal spaces.
Their efficiency is easily increased by lowering ratios.
With some ratios, there is resistance to back driving.
Available from 48 DP to 3 DP
Stocked as single, double and quad start configurations

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