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December 27, 2019

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 motor be mounted off center
Right angle input techniques the hydraulic engine 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 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 linked 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 electric 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 installation of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive compact.
Steel or high-influence spheroidal cast iron structure.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front side mechanical seal designed particularly for the earth-moving machines.
Maximum Torque Up to 170,000 Nm
Tranny Ratio Up to 230 iN
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Brevini planetary monitor drives are designed for tracked vehicles and earth-moving devices. They possess a heavy-duty casing, a brief overall size, and great radial and axial load capability.
Our gearboxes are provided with integral 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 used in the most severe environmental working circumstances. Brevini planetary track 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 design, the compact construction and the wonderful performance characteristics of the PGR/PGW series 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 brief overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and will be installed directly on hydraulic motors and so 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 track drives, small, 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 significantly different operating/travel acceleration ratio.
Note that this is also the right product for road paving devices, along with construction equipment and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear arranged. In this post, we’ll discuss planetary gear pieces, the parts that produce them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Quickness, High Torque Motors
The majority of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Swiftness and torque are related by power:
Power = Speed x Torque
That means if we want to boost torque for a given horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the word “low-speed, high-torque.” One method of reducing velocity involves the use of planetary gears. They offer speed reduction which results in torque multiplication. And they do that all in a compact package when compared to gear and pinion rate reducers, and that means they have excellent torque density. Below you can observe a planetary gear program from a final drive motor.
Planetary gear established from a final drive displaying the carrier, ring gear, sun equipment, and planetary gears
Carrier for a couple of 3 planetary gears from a 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 jointly by a carrier, as shown in the image above. As you can see, all three gears are arranged the same distance from one another. At the center is a place for sun gear to mesh and provide input to the machine.
How Last Drive Planetary Gears Work
Let’s take a simplified look at the way the planetary gears in a final drive work. Insight power causes the sun equipment to rotate at high quickness. The planets mesh with both the sun gear and the ring equipment. They orbit sunlight gear while rolling around the band gear. The result is low quickness, high torque output rotation.
Maintaining the Planetary Gearbox
On your final drive engine, the planetary gearbox requires gear oil, also referred to as gear lube. It is essential to check the apparatus oil levels about every 100 hours and change the gear oil once a year. If you don’t alter out your gear essential oil, you’ll end up with a solid sludge that will result in excessive wear of your planetary equipment system. Here at Texas Last Drive, we refer to that as “pudding.”
Another key aspect of maintaining your planetary gearbox is fixing any leaking seals immediately. If a seal is usually degraded enough to allow essential oil to leak out, then which means dirt and dirt can make their method in. You do not want to have your gears look like the gritty mess demonstrated 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. Remember to check and alter the gear oil and don’t ignore leaks. Also keep in mind that pudding and grit aren’t the thing you need in your gearbox!
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 driving rubber tired or tracked self-propelled vehicles.