December 27, 2019

Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Variety of input options
Straight in for an on centerline adaptation offering 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 engine perpendicular to the centerline of the planetary drive for added clearance between parts on track drives
Output options
With external shaft includes keyed, flanged or spline options to meet up the various required output connections
An added output option includes the result without external shaft by offering 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 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 (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 engine 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-effect 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 mechanical seal designed particularly for the earth-moving machines.
Optimum Torque Up to 170,000 Nm
Tranny Ratio Up to 230 iN
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Brevini planetary monitor drives are made for tracked vehicles and earth-moving devices. They have a heavy-duty casing, a brief overall duration, and great radial and axial load capacity.
Our gearboxes are provided with essential multidisc parking brake and have been made for direct mounting of hydraulic plug-in motors. The careful selection 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 option for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Monitor 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 driving 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 brief overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and will be installed on hydraulic motors and are prepared 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. The item is extremely useful specifically in wheeled and tracked devices, which feature a significantly different operating/travel speed ratio.
Note that that is also the proper product for road paving machines, along with construction apparatus and forestry machines.
Final drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear arranged. In this article, we’ll talk about planetary gear pieces, the parts that make them up, and how they function.
Planetary Gears and Final Drive Motors
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Low Velocity, High Torque Motors
Most 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 enhance torque for a given horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One way of reducing quickness involves the use of planetary gears. They provide speed reduction which results in torque multiplication. Plus they do this all in a compact package in comparison with gear and pinion rate reducers, and that means they have exceptional torque density. Below you can view a planetary gear program from a final drive motor.
Planetary gear established from your final drive showing the carrier, ring gear, sun equipment, and planetary gears
Carrier for a couple of three planetary gears from your final drive
Planetary Gear Systems
In a final drive gear hub, you will most likely have two sets of three planetary gears that rotate about a sun gear. In addition they 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 possible plainly see, all three gears are arranged an equal distance from each other. At the center is a location for sun equipment to mesh and provide input to the system.
How Last 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 gear to rotate at high quickness. The planets mesh with both sun gear and the ring gear. They orbit sunlight gear while rolling around the band gear. The effect is low acceleration, high torque result rotation.
Maintaining the Planetary Gearbox
On a final drive motor, the planetary gearbox needs equipment oil, also referred to as gear lube. It is vital to check the gear oil amounts 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 lead to excessive wear of your planetary gear system. Here at Texas Last Drive, we refer to that as “pudding.”
Another key facet of maintaining your planetary gearbox is certainly fixing any leaking seals right away. If a seal is usually degraded enough to allow oil to leak out, after that that means dirt and dirt can make their way in. You don’t want to have your gears appear to be the gritty mess demonstrated 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 should keep your machine moving. Remember to check and change the gear essential oil and don’t ignore leaks. Also keep in mind that pudding and grit are not what you need in your gearbox!
The present day and innovative design, the compact construction and the excellent performance characteristics of the PGR/PGW series of gear units make these especially ideal for traveling rubber tired or tracked self-propelled vehicles.