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 set for an upon centerline adaptation offering a symmetrical clearance about the hydraulic motor input
Offset straight in enables the hydraulic electric 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 Planetary Track Drive options to meet up the various required output connections
An added output choice 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 result 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 installation of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive compact.
Steel or high-impact spheroidal cast iron framework.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports locations easy to reach.
Front mechanical seal designed specifically for the earth-moving devices.
Optimum Torque Up to 170,000 Nm
Transmission Ratio Up to 230 iN
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Brevini planetary track drives are made for tracked automobiles and earth-moving machines. They have a heavy-duty casing, a short overall duration, and great radial and axial load capability.
Our gearboxes are given with essential multidisc parking brake and also have been created for direct installation of hydraulic plug-in motors. The careful selection of the materials and style allows our monitor drives, CTD and CTU, to be utilized in the most serious environmental working circumstances. Brevini planetary monitor drive units are the perfect option for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The present day and innovative style, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially ideal for generating rubber tired or tracked self-propelled vehicles.
These compact planetary track drives are specifically made for tracked vehicles: excavators and earth-moving machines.
They have a heavy-duty casing, a brief overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and may be installed directly on hydraulic motors and are prepared 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 track drives, compact, rugged, for construction vehicles
Description
This gear shaft final drive comes with LO-HI speed and was created for increased performance. That is extremely useful especially in wheeled and tracked devices, which feature a considerably different operating/travel swiftness ratio.
Note that this is also the proper product for road paving machines, along with construction gear and forestry machines.
Final 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 Last Drive Motors
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3 Things You Should Know About Gear Oil for Final Drives
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Low Swiftness, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Velocity and torque are related by power:
Power = Speed x Torque
That means if we want to increase torque for a given horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the word “low-speed, high-torque.” One method of reducing quickness involves the utilization of planetary gears. They offer speed reduction which outcomes in torque multiplication. Plus they do this all in a compact package in comparison with gear and pinion rate reducers, and which means they have superb torque density. Below you can see a planetary gear system from your final drive motor.
Planetary gear arranged from a final drive showing the carrier, ring gear, sun gear, and planetary gears
Carrier for a set of three 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 in regards to a sun gear. In addition they mesh with a stationary ring gear. The upper group of planetary gears are held jointly by a carrier, as proven in the image above. As you can plainly see, all three gears are arranged the same distance from each other. At the center is a location for sun gear to mesh and offer input to the machine.
How Last Drive Planetary Gears Work
Let’s have a simplified look in how the planetary 
gears in your final drive work. Insight power causes sunlight gear to rotate at high quickness. The planets mesh with both sun equipment and the ring gear. They orbit sunlight equipment while rolling around the band gear. The effect is low velocity, high torque output rotation.
Maintaining the Planetary Gearbox
On a final drive engine, the planetary gearbox requires gear oil, also known as gear lube. It is vital to check the gear oil levels about every 100 hours and change the gear oil once a year. In the event that you don’t change out your gear essential oil, you’ll end up with a heavy sludge that will result in excessive wear of your planetary gear system. At Texas Final Drive, we refer to that as “pudding.”
Another key facet of keeping your planetary gearbox is fixing any leaking seals right away. If a seal is usually degraded enough to permit oil to leak out, after that which means dirt and dust can make their way in. You don’t want to have your gears look like the gritty mess proven below.
final-drive-hydraulic-motor-gear-oil-sludge-2
Conclusion
Your planetary gearbox is a key component of your final drive. If it fails, you won’t be able to generate the torque you need to keep your machine shifting. Be sure you check and change the gear oil and don’t disregard leaks. Also keep in mind that pudding and grit aren’t the thing you need in your gearbox!
The modern and innovative style, the compact construction and the wonderful performance characteristics of the PGR/PGW group of gear units make these especially ideal for traveling rubber tired or tracked self-propelled vehicles.
