sun planet gear

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

We stock the quality Ever-Power gears that meet up with the needs of a variety of commercial, commercial and military applications, both off-highway and on-highway. Our Gears inventory features the ring and pinion product line from Ever-Power. They are vital parts within our stock of carrier parts. At Ever-Power, you can get bands and pinions with OE quality that are built for toughness and reliability. Each established is manufactured to aid your vehicle’s optimal performance. The ring and pinions are mated during manufacturing and heat treated for the specific hardness the application demands. These important pieces of equipment keep your vehicles moving. When a repair or alternative is required, you can look to Ever-power to supply the precise component required. The ring and pinions we stock are designed with the components and processes to meet up OE specifications. As legitimate replacement gears, they’re manufactured to the same specifications as the manufacturer’s parts. Compromising a part could mean compromising functionality. And there’s no need to perform that when you can look to our considerable gear inventory.
Gear Sets for Commercial Vehicles

Ever-Power new planetary reducers employ a floating sun equipment rather than a set position one.
The saying ”There’s nothing new under the sun’ certainly applies to planetary reducers. And, while floating sun gears have already been around quite a while, some engineers may not be aware of the benefits this unusual gear design can offer.
Traditionally, planetary reducers possess used a fixed sun gear, where in fact the centre gear is mounted on or machined into the shaft. When this fixed sun equipment revolves, it turns the earth gears to create motion and/or power. Ever-Power new planetary reducers, however, are employing a floating sun gear rather than a set position sun gear.
Why a floating sun equipment? ‘In the planetary idea, the sun is the driver, or pinion, in the gear set,’Ever-Power style engineer Scott Hulstein said. ‘Because the sun gear is in continuous contact with the planets, it’s important that it is perfectly centred among the three planets in order to provide equal load posting 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 allowing the sun gear to float, it centres itself among the three planets and produces continuous, equal load sharing.’
Equal load sharing is just one of the advantages of this design. The floating sun gear provides ‘accurate involute actions,’ according to Hulstein. Accurate involute action takes place when the rolling motion between the mating gears is really as complete as feasible. The advantage of this total meshing of gears is certainly longer reducer existence, since less internal equipment slippage means fewer broken gear teeth.
That also means lower noise amounts. When the sun gear is permitted to completely roll into the planet gears, there’s less ‘rattling’ as the teeth mesh. In effect, the Ever-Power product has ‘designed out’ the apparatus mesh noise by allowing sunlight gear to float into place.
So why make use of a fixed sun gear at almost all? ‘Fixed sun gears are often used in true servo applications,’ Greg Pennings, Ever-Power Consumer Advocate, explained. ‘A fixed sun gear is sun planet gear essential when precise positioning and low backlash are an integral part of the application.’ 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.
By using the floating sun gear concept, the Ever-Power planetary reducers can easily exceed the torque ratings of similar sized and bigger sized parallel shaft reducers, and yet maintain a lower noise levels.
Sun, Ring and Planet
The most basic kind of planetary gearset is demonstrated in the figures above. The figure at left shows a three-dimensional view as the figure at right provides a cross-section. In this geartrain, inputs and output can be extracted from the carrier, band and sunlight gears, and only the earth experiences epicyclic motion. That is the many common type of planetary gearset (with the exception of the differential) and it finds application in quickness reducers and automated transmissions. If you take apart 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 sunlight gears, and the two planet gears (the yellow gears) rotate as a single unit. Sunlight gears (green and brownish) 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 can be achieved with this unit, but it can suffer from low efficiency if not designed correctly.
Reddish sun input – purple sun fixed
Purple sun input – reddish colored 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 left and counterclockwise in the animation at right – even though sunlight rotates counterclockwise in both instances.
The Differential
The gearset proven above is different from the preceding gearsets for the reason that it is made up of miter gears rather than spur (or helical) gears. The ‘sun’ gears are those that do not go through the epicyclic motion experienced by the planet. And the differential can be utilized to measure the difference in speed between two shafts for the purpose of synchronization. In addition, the differential is frequently used in automotive drive trains to conquer the difference in wheel quickness when a car goes around a corner.

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