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 giving 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 components on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet the many required output connections
An added output choice includes the result without external 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 would depend on the drive configuration.
2 Max input speed related to ratio and max output speed
3 Max radial load placed 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 more than the roughest and steepest terrain.
Planetary Track Drive designed to allow installation of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive small.
Steel or high-influence spheroidal cast iron structure.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports locations easy to reach.
Front side mechanical seal designed specifically for the earth-moving devices.
Maximum Torque Up to 170,000 Nm
Transmission Ratio Up to 230 iN
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Brevini planetary track drives are created for tracked vehicles and earth-moving devices. They have a heavy-duty casing, a brief overall duration, and great radial and axial load capability.
Our gearboxes are given with integral multidisc parking brake and have been created for direct installation of hydraulic plug-in motors. The careful selection of the materials and design allows our monitor drives, CTD and CTU, to be utilized in the most severe environmental working conditions. Brevini planetary monitor drive units are the perfect alternative for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The modern and innovative design, the compact construction and the excellent 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 monitor 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 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, small, rugged, for construction vehicles
Description
This gear shaft final drive includes LO-HI speed and was created for increased performance. The item is extremely useful specifically in wheeled and tracked machines, which feature a significantly different operating/travel acceleration ratio.
Note that that is also the right product for road paving machines, along with construction equipment and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear established. In this post, we’ll discuss planetary gear sets, the parts that produce them up, and how they work.
Planetary Gears and Final Drive Motors
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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. Quickness and 
torque are related by power:
Power = Speed x Torque
That means if you 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 speed involves the use of planetary gears. They provide speed reduction which outcomes in torque multiplication. And they do that all in a concise package when compared to gear and pinion rate reducers, and that means they have exceptional torque density. Below you can observe a planetary gear program from your final drive motor.
Planetary gear established from a final drive showing the carrier, ring gear, sun gear, and planetary gears
Carrier for a couple of three 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 in regards to a sun gear. They also mesh with a stationary band gear. The upper set of planetary gears are kept jointly by a carrier, as demonstrated in the picture above. As you can see, all three gears are organized the same distance from each other. At the guts is a location for sun gear to mesh and provide input to the machine.
How Final Drive Planetary Gears Work
Let’s take a simplified look in how the planetary gears in your final drive work. Input power causes the sun equipment to rotate at high swiftness. The planets mesh with both sun equipment and the ring equipment. They orbit sunlight gear while rolling around the band gear. The result is low velocity, high torque output rotation.
Maintaining the Planetary Gearbox
On a final drive engine, the planetary gearbox needs gear oil, also known as gear lube. It is vital to check the apparatus oil levels about every 100 hours and change the gear oil one per year. If you don’t modify out your gear oil, you’ll end up with a heavy sludge that will result in excessive use of your planetary equipment system. Here at Texas Last Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox is definitely fixing any leaking seals immediately. If a seal is certainly degraded enough to permit 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 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 have the ability to generate the torque you need to keep your machine moving. Be sure you check and change the gear essential oil and don’t disregard leaks. And don’t forget that pudding and grit are not what you need in your gearbox!
The present day and innovative style, the compact construction and the wonderful performance characteristics of the PGR/PGW group of gear units make these especially ideal for driving rubber tired or tracked self-propelled vehicles.
