Planetary Gear Drive
Drive type: speed reducer
Output torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Selection of input options
Straight in for an upon centerline adaptation giving a symmetrical clearance about the hydraulic motor input
Offset straight in allows the hydraulic engine 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 many required output connections
An added output choice includes the result without exterior shaft by providing an interior spline at the output
Planetary Gear Drive
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 electric motor inputSAE C or D
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Planetary Track Drives
High torque and load capacities, to transport 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 framework.
Main bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front side 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 monitor drives are created for tracked automobiles and earth-moving machines. They have a heavy-duty casing, a brief overall size, and great radial and axial load capability.
Our gearboxes are given with essential multidisc parking brake and have been made 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 track drive units are the perfect option for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The modern and innovative design, the compact construction and the wonderful performance characteristics of the PGR/PGW group of gear units make these especially suitable for traveling rubber tired or tracked self-propelled vehicles.
These compact planetary monitor 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 intrinsic multidisc failsafe brake and may be installed directly on hydraulic motors and are ready to accept ‘plug-in’ hydraulic motors.
Shaft orientation:
> 10 kNm
high-torque, high load capacity
Other characteristics:
for wheel and track drives, compact, rugged, for construction vehicles
This gear shaft final drive includes LO-HI speed and was made for increased performance. That is extremely useful specifically in wheeled and tracked devices, which feature a considerably different operating/travel speed ratio.
Note that this is also the right product for road paving devices, along with construction apparatus and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear arranged. In this post, we’ll talk about planetary gear models, the parts that make them up, and how they work.
Planetary Gears and Final Drive Motors
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Low Swiftness, High Torque Motors
Most of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Acceleration and torque are related by power:
Power = Speed x Torque
That means if we want to enhance torque for a given horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One way of reducing speed involves the utilization of planetary gears. They provide speed reduction which outcomes in torque multiplication. And they do this all in a concise package in comparison with gear and pinion swiftness reducers, and that means they have superb torque density. Below you can observe a planetary gear program from your final drive motor.
Planetary gear set from a final drive displaying the carrier, ring equipment, sun gear, and planetary gears
Carrier for a set 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 together by a carrier, as shown in the picture above. As you can see, all three gears are arranged an equal distance from each other. At the center is a place for sun equipment 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. Input power causes the sun equipment to rotate at high velocity. The planets mesh with both the sun gear and the ring gear. They orbit sunlight equipment while rolling around the ring gear. The effect is low quickness, high torque result rotation.
Maintaining the Planetary Gearbox
On your final drive motor, the planetary gearbox needs gear oil, also known as gear lube. It is vital to check the gear oil amounts about every 100 hours and change the apparatus oil one per year. If you don’t alter out your gear oil, you’ll end up with a solid sludge that will result in excessive use of your planetary gear system. Here at Texas Final Drive, we make reference to that as “pudding.”
Another key facet of keeping your planetary gearbox can be fixing any leaking seals right away. If a seal is usually degraded enough to allow essential oil to leak out, after that which means dirt and dirt can make their method in. You don’t want to have your gears look like the gritty mess proven below.
Your planetary gearbox is a key component of your final drive. If it fails, you won’t be able to generate the torque you have to keep your machine shifting. Be sure you check and modify the gear essential oil and don’t ignore leaks. And don’t forget 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 generating rubber tired or tracked self-propelled vehicles.