Planetary Gear Drive
Drive type: speed reducer
Output torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Features
Variety of input options
Straight set for an upon centerline adaptation providing a symmetrical clearance around the hydraulic motor input
Offset straight in allows the hydraulic motor be mounted off center
Right angle input moves the hydraulic motor perpendicular to the centerline of the planetary drive for added clearance between elements on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet up the various required output connections
An added output option includes the result without exterior shaft by offering an internal spline at the output
F25R
Planetary Gear Drive
Ratings
Input power (max)71 kW (95 hp)
Input speed (max)2800 rpm2
Output torque (intermittent)33,895 Nm (25,000 lb-ft)
Output torque (continuous)18,710 Nm (13,800 lb-ft)
1 Actual ratio is dependent on the drive configuration.
2 Max input speed linked to ratio and max output speed
3 Max radial load positioned at optimum load position
4 Weight varies with configuration and ratio selected
5 Requires tapered roller planet bearings (unavailable with all ratios)
General data
Approximate dry weight215 – 263 kg (475 – 580 lb)4
Radial load (max)28,570 kg (63,000 lb)3
Drive typeSpeed reducer
Hydraulic engine inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to carry equipment more than the roughest and steepest terrain.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive small.
Steel or high-impact spheroidal cast iron structure.
Main bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports locations easy to reach.
Front side mechanical seal designed particularly for the earth-moving machines.
Optimum Torque Up to 170,000 Nm
Planetary Track Drive Transmitting Ratio Up to 230 iN
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Brevini planetary track drives are made for tracked vehicles and earth-moving devices. They have a heavy-duty casing, a short overall length, and great radial and axial load capacity.
Our gearboxes are given with integral multidisc parking brake and have been made for direct mounting of hydraulic plug-in motors. The careful selection of the components and style allows our monitor drives, CTD and CTU, to be used in the most severe environmental working circumstances. Brevini planetary monitor drive units will be the perfect answer for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Track and Wheel drives
The present day and innovative design, the compact construction and the wonderful performance characteristics of the PGR/PGW group of gear units make these especially suitable for generating rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically created for tracked vehicles: excavators and earth-moving machines.
They have a heavy-duty casing, a short overall length, and great radial and axial load capacity.
They have an integral multidisc failsafe brake and may be installed directly on hydraulic motors and are ready to accept ‘plug-in’ hydraulic motors.
Egenskaper
Type:
planetary
Shaft orientation:
coaxial
Torque:
> 10 kNm
Performance:
high-torque, high load capacity
Other characteristics:
for wheel and monitor drives, compact, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was designed for increased performance. The item is extremely useful especially in wheeled and tracked machines, which feature a considerably different operating/travel velocity ratio.
Note that that is also the proper product for street paving machines, along with construction devices and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear set. In this article, we’ll discuss planetary gear units, the parts that make them up, and how they work.
Planetary Gears and Last Drive Motors
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Low Velocity, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Rate and torque are related by power:
Power = Speed x Torque
That means if we want to increase torque for confirmed horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One way of reducing quickness involves the usage of planetary gears. They offer speed reduction which results in torque multiplication. And they do that all in a concise package in comparison with gear and pinion speed reducers, and that means they have excellent torque density. Below you can view a planetary gear system from a final drive motor.
Planetary gear established from a final drive showing the carrier, ring equipment, sun equipment, and planetary gears
Carrier for a couple of 3 planetary gears from your final drive
Planetary Gear Systems
In your final drive gear hub, you will usually have two sets of three planetary gears that rotate about a sun gear. They also mesh with a stationary ring gear. The upper set of planetary gears 
are held collectively by a carrier, as proven in the picture above. As you can see, all three gears are arranged an equal distance from each other. At the guts is a location for sun equipment to mesh and offer input to the machine.
How Last Drive Planetary Gears Work
Let’s have a simplified look at the way the planetary gears in your final drive work. Insight power causes the sun equipment to rotate at high velocity. The planets mesh with both the sun equipment and the ring gear. They orbit sunlight gear while rolling around the band gear. The result is low acceleration, high torque result rotation.
Maintaining the Planetary Gearbox
On your final drive electric motor, the planetary gearbox needs gear oil, also referred to as gear lube. It is essential to check the gear oil levels about every 100 hours and change the apparatus oil one per year. In the event that you don’t change out your gear oil, you’ll finish up with a thicker sludge that will lead to excessive wear of your planetary equipment system. Here at Texas Final Drive, we refer to that as “pudding.”
Another key aspect of keeping your planetary gearbox is fixing any leaking seals right away. If a seal is certainly degraded enough to allow essential oil to leak out, after that which means dirt and dust can make their method in. You do not want your gears look like the gritty mess shown below.
final-drive-hydraulic-motor-gear-oil-sludge-2
Conclusion
Your planetary gearbox is an essential component of your final drive. If it fails, you won’t be able to generate the torque you should keep your machine shifting. Remember to check and alter the gear essential oil and don’t ignore leaks. Also keep in mind that pudding and grit aren’t what you need in your gearbox!
The modern and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially ideal for driving rubber tired or tracked self-propelled vehicles.
