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 upon centerline adaptation providing a symmetrical clearance about the hydraulic motor input
Offset straight in allows the hydraulic motor be mounted off center
Right angle input movements the hydraulic electric motor 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 the many required output connections
An added output option includes the result without external shaft by offering an internal 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 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 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-impact 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
Tranny Ratio Up to 230 iN
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Brevini planetary track drives are created for tracked automobiles and earth-moving machines. They have a heavy-duty casing, a short overall length, and great radial and axial load capability.
Our gearboxes are given with integral multidisc parking brake and also have been designed for direct installation of hydraulic plug-in motors. The careful choice of the materials and style allows our track drives, CTD and CTU, to be used in the most severe environmental working circumstances. Brevini planetary Planetary Track Drive Monitor drive units will be the perfect option for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Monitor and Wheel drives
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 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 short overall length, and great radial and axial load capacity.
They have an intrinsic multidisc failsafe brake and can be installed on hydraulic motors and so 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 created for increased performance. That is extremely useful specifically in wheeled and tracked devices, which feature a significantly different operating/travel velocity ratio.
Note that this is also the right product for street paving machines, along with construction tools and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear established. In this article, we’ll talk about planetary gear models, the parts that make them up, and how they function.
Planetary Gears and Last 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. Velocity and torque are related by power:
Power = Speed x Torque
That means if you want to increase torque for a given horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing rate involves the use of planetary gears. They offer speed reduction which outcomes in torque multiplication. Plus they do that all in a concise package in comparison with gear and pinion velocity reducers, and which means they have excellent torque density. Below you can see a planetary gear system from a final drive motor.
Planetary gear arranged from your final drive showing the carrier, ring gear, sun gear, and planetary gears
Carrier for a couple of 3 planetary gears from a 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 kept jointly by a carrier, as proven in the picture above. As you can see, all three gears are organized the same distance from one another. At the center is a location for sun equipment to mesh and offer input to the machine.
How Final Drive Planetary Gears Work
Let’s have a simplified look at the way the planetary gears in a final drive work. Input power causes sunlight equipment to rotate at high velocity. The planets mesh with both sun equipment and the ring gear. They orbit the sun equipment while rolling around the ring gear. The effect is low acceleration, high torque output rotation.
Maintaining the Planetary Gearbox
On a final drive engine, the planetary gearbox needs equipment oil, also referred to as equipment lube. It is vital to check the gear oil amounts about every 100 hours and change the gear oil one per year. If you don’t change out your gear essential oil, you’ll end up with a thicker sludge that will lead to excessive wear of your planetary equipment system. At Texas Final Drive, we make reference to that as “pudding.”
Another key aspect of maintaining your planetary gearbox is certainly fixing any leaking seals immediately. If a seal is usually degraded enough to allow oil to leak out, then which means dirt and dirt can make their method in. You don’t want to have your gears look like the gritty mess shown below.
Your planetary gearbox is a key component of your final drive. If it fails, you won’t have the ability to generate the torque you should keep your machine moving. Be sure you check and alter the gear essential oil and don’t ignore 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 series of gear units make these especially suitable for driving rubber tired or tracked self-propelled vehicles.