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, high performance gears. AxleTech offers individual carrier parts, such as gear sets, to address 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 utilize for your repair.

We stock the quality Ever-Power gears that meet the needs of a range of commercial, industrial and military applications, both off-highway and on-highway. Our Gears inventory features the band and pinion products from Ever-Power. They are essential parts in your stock of carrier elements. At Ever-Power, you could find bands and pinions with OE quality that are designed for durability and reliability. Each arranged is manufactured to support your vehicle’s optimized performance. The band and pinions are mated during production and temperature treated for the exact hardness the application demands. These essential pieces of hardware keep your automobiles moving. Whenever a repair or replacement is necessary, you can turn to Ever-power to provide the specific component required. The band and pinions we share are built with the materials and procedures to meet OE specifications. As authentic replacement gears, they’re produced to the same requirements as the manufacturer’s parts. Compromising a component could mean compromising overall performance. And there’s you don’t need to do that when you’re able to look to our comprehensive gear inventory.
Gear Sets for Industrial 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 pertains to planetary reducers. And, while floating sun gears have been around quite a while, some engineers may not be aware of the huge benefits this unusual gear style can offer.
Traditionally, planetary reducers possess used a set sun gear, where in fact the centre gear is mounted on or machined in to 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 having a floating sun equipment rather than a set position sun gear.
Why a floating sun equipment? ‘In the planetary concept, 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 properly centred among the three planets to be able to provide equal load posting among itself and all three planets.’
Because of normal manufacturing tolerances however, a sun gear which is securely set on a shaft will intermittently have significantly more load on one planet equipment than on another equipment Hulstein explained. ‘By allowing the sun equipment to float, it centres itself among the three planets and creates continuous, equal load sharing.’
Equal load sharing is just one of the advantages of this design. The floating sun gear provides ‘true involute actions,’ according to Hulstein. True involute action takes place when the rolling motion between the mating gears is as complete as possible. The advantage of this complete meshing of gears can be longer reducer existence, since less internal equipment slippage means fewer broken gear teeth.
That also means lower noise amounts. When sunlight 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 all? ‘Fixed sun gears are often used in true servo applications,’ Greg Pennings, Ever-Power Client Advocate, explained. ‘A fixed sun gear is 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 sun 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, yet maintain a lower noise levels.
Sun, Ring and Planet
The most basic kind of planetary gearset is shown in the figures above. The figure at still left shows a three-dimensional view as the figure at right provides a cross-section. In this geartrain, inputs and sun planet gear output can be taken from the carrier, ring 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 swiftness reducers and automated transmissions. Invest the apart a cordless drill, you’ll probably find this kind of planetary gearset directly behind the drill chuck.
Two Suns – Two Planets gearset
Cross-sectional view
Two Suns, Two Planets
The gearset shown above has two sunlight gears, and the two planet gears (the yellow gears) rotate as an individual 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 have problems with low efficiency if not designed correctly.
Red sun input – purple sun fixed
Purple sun input – reddish sun fixed
The animations above show the ‘two suns – two planets’ gearset with one sunlight as input and the other sunlight fixed. Note that the carrier rotates clockwise in the computer animation at left and counterclockwise in the animation at right – even though the sun rotates counterclockwise in both instances.
The Differential
The gearset proven above is different from the preceding gearsets in that it is made up of miter gears instead of 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.