Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Features
Variety of input options
Straight in for an on centerline adaptation providing a symmetrical clearance around the hydraulic motor input
Offset straight in allows the hydraulic engine be mounted off center
Right angle input techniques the hydraulic motor perpendicular to the centerline of the planetary drive for added clearance between components on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet up the many required output connections
An added output option includes the output without exterior shaft by offering an interior 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 (not available 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 motor inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to carry equipment over the roughest and steepest terrain.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, whilst still keeping the drive compact.
Steel or high-effect spheroidal cast iron framework.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front mechanical seal designed specifically for the earth-moving machines.
Optimum Torque Up to 170,000 Nm
Transmitting Ratio Up to 230 iN
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Brevini planetary track drives are designed for tracked automobiles and earth-moving devices. They have a heavy-duty casing, a short overall duration, and great radial and axial load capability.
Our gearboxes are given with integral multidisc parking brake and have been designed for direct mounting of hydraulic plug-in motors. The careful choice of the materials and design allows our track drives, CTD and CTU, to be utilized in the most severe environmental working conditions. Brevini planetary track drive units are the perfect answer for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Monitor and Wheel drives
The modern and innovative style, the compact construction and the wonderful performance characteristics of the PGR/PGW series of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically designed 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 intrinsic multidisc failsafe brake and can be installed directly on hydraulic motors and are ready to accept ‘plug-in’ hydraulic motors.
Characteristics
Type:
planetary
Shaft orientation:
coaxial
Torque:
> 10 kNm
Performance:
high-torque, high load capacity
Other characteristics:
for wheel and monitor drives, small, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was created for increased performance. That is extremely useful specifically in wheeled and tracked devices, which feature a significantly different operating/travel acceleration ratio.
Note that this is also the right product for road paving devices, along with construction products and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear arranged. In this article, we’ll discuss planetary gear pieces, the parts that make them up, and how they work.
Planetary Gears and Final Drive Motors
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Final Drive Motors and Gears
3 Things You Should Know About Gear Oil for Final Drives
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Low Acceleration, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Speed 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 word “low-speed, high-torque.” One method of reducing acceleration involves the utilization of planetary gears. They provide speed reduction which results in torque multiplication. Plus they do this all in a compact package when compared to gear and pinion acceleration reducers, and which means they have superb torque density. Below you can view a planetary gear system from a final drive motor.
Planetary gear established from your 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 most likely have two sets of three planetary gears that rotate about a sun gear. They also mesh with a stationary band gear. The upper set of planetary gears are held collectively by a carrier, as shown in the picture above. As you can see, all three gears are arranged the same distance from one another. At the guts is a place for sun equipment to mesh and offer input to the system.
How Last Drive Planetary Gears Work
Let’s take a simplified look at how the planetary gears in a final drive work. Input power causes sunlight gear to rotate at high speed. 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 rate, high torque output rotation.
Maintaining the Planetary Gearbox
On a final drive electric motor, the planetary gearbox needs equipment oil, also referred to as equipment lube. It is vital to check the apparatus oil amounts about every 100 hours and change the gear oil one per year. In the event that you don’t alter out your gear essential oil, you’ll finish up with a heavy sludge that will lead to excessive put on of your planetary gear system. Here at Texas Last Drive, we make reference to that as “pudding.”
Another key aspect of keeping your planetary gearbox is certainly fixing any leaking seals right away. If a seal is usually degraded enough to permit essential oil to leak out, after that that means dirt and dirt can make their way in. You don’t want your gears appear to be the gritty mess proven 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 have the ability to generate the torque you need to keep your machine shifting. Be sure you check and alter the gear 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 
design, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
