sun planet gear

Our gear category supplies the quality parts to fit your vehicle and its desired performance. You can search or shop for rings and pinions, side gears, planetary ring and sun gears, and differential pinion gears, plus spur and, powerful gears. AxleTech offers individual carrier parts, such as gear sets, to handle specific servicing needs. Our heavy duty gears are authentic, OE-quality parts built to specs for demanding duty. Shop now to trust the part you use for your repair.

We stock the quality Ever-Power gears that meet the needs of a variety of commercial, industrial and military applications, both off-highway and on-highway. Our Gears inventory features the ring and pinion products from Ever-Power. They are essential parts in your stock of carrier components. At Ever-Power, you will discover bands and pinions with OE quality that are designed for sturdiness and reliability. Each established is manufactured to aid your vehicle’s optimal performance. The band and pinions are mated during production and high temperature treated for the exact hardness the application demands. These essential pieces of hardware keep your vehicles moving. Whenever a repair or replacement is required, you can turn to Ever-power to provide the exact component required. The band and pinions we share are designed with the components and processes to meet OE specifications. As real replacement gears, they’re manufactured to the same specifications as the manufacturer’s parts. Compromising a part could mean compromising efficiency. And there’s no need to do that when you can look to our comprehensive gear inventory.
Gear Sets for Industrial Vehicles

Ever-Power new planetary reducers hire a floating sun gear rather than a set position one.
The saying ”There’s nothing new beneath the sun’ certainly applies to planetary reducers. And, while floating sun gears have already been around quite a while, some engineers might not become aware of the benefits this unusual gear design can offer.
Traditionally, planetary reducers have used a fixed sun gear, where the centre gear is mounted on or machined into the shaft. When this set sun gear revolves, it turns the earth gears to create sun planet gear motion and/or power. Ever-Power new planetary reducers, however, are employing a floating sun gear rather than a fixed position sun gear.
Why a floating sunlight gear? ‘In the planetary idea, the sun is the driver, or pinion, in the gear set,’Ever-Power design engineer Scott Hulstein stated. ‘Because the sun gear is in constant contact with the planets, it’s important that it’s perfectly centred among the three planets in order to provide equal load sharing among itself and all three planets.’
Because of normal manufacturing tolerances however, a sun equipment which is securely set on a shaft will intermittently have significantly more load on one planet equipment than on another gear Hulstein explained. ‘By permitting the sun gear to float, it centres itself among the three planets and produces constant, equal load sharing.’
Equal load posting is just one of the advantages of this design. The floating sun gear provides ‘accurate involute actions,’ according to Hulstein. Accurate involute action occurs when the rolling motion between the mating gears is really as complete as feasible. The benefit of this total meshing of gears is longer reducer lifestyle, since less internal equipment slippage means fewer broken gear teeth.
That does mean lower noise levels. When sunlight gear is permitted to completely roll into the world gears, there’s much less ‘rattling’ as one’s teeth mesh. In place, the Ever-Power product offers ‘designed out’ the gear mesh noise by allowing sunlight gear to float into place.
So why use a fixed sun gear at most? ‘Fixed sun gears tend to be used in true servo applications,’ Greg Pennings, Ever-Power Consumer Advocate, explained. ‘A fixed sun gear is necessary when specific positioning and low backlash are an integral part of the software.’ Ever-Power engineers, nevertheless, were less concerned with low backlash and more interested with higher torque and/or lower noise applications.
Our planetary reducers with floating sunlight gears were made to compete with parallel shaft reducers, where backlash was less critical,’ Pennings said.
Utilizing the floating sun gear concept, the Ever-Power planetary reducers are able to exceed the torque rankings of similar sized and larger sized parallel shaft reducers, and yet maintain a lesser noise levels.
Sun, Ring and Planet
The most basic type of planetary gearset is demonstrated in the figures above. The figure at left shows a three-dimensional look at as the figure at right offers a cross-section. In this geartrain, inputs and output can be extracted from the carrier, band and sun gears, and just the planet experiences epicyclic motion. That is the many common type of planetary gearset (with the exception of the differential) and it discovers application in speed reducers and automated transmissions. If you take aside a cordless drill, you’ll probably find this kind of planetary gearset right behind the drill chuck.
Two Suns – Two Planets gearset
Cross-sectional view
Two Suns, Two Planets
The gearset demonstrated above has two sun gears, and the two planet gears (the yellow gears) rotate as a single unit. The sun gears (green and dark brown) can rotate independently of 1 another. The inputs and result can be chosen from either sun equipment and/or the carrier. Very high speed reductions may be accomplished with this unit, nonetheless it can suffer from low efficiency if not really designed correctly.
Reddish sun input – purple sun fixed
Purple sun input – crimson sun fixed
The animations above show the ‘two suns – two planets’ gearset with one sunlight as input and the other sunlight fixed. Remember that the carrier rotates clockwise in the animation at remaining and counterclockwise in the animation at right – despite the fact that sunlight rotates counterclockwise in both situations.
The Differential
The gearset shown above differs from the preceding gearsets for the reason that it is composed of miter gears rather than spur (or helical) gears. The ‘sun’ gears are the ones that do not go through the epicyclic motion experienced by the planet. And the differential can be utilized to measure the difference in rate between two shafts for the purpose of synchronization. In addition, the differential is frequently used in automotive drive trains to get over the difference in wheel velocity when a car encircles a corner.