December 27, 2019

Planetary Gear Drive
Drive type: speed reducer
Result torque: 33,895 Nm (25,000 lb-ft)
Max input speed: 2800 rpm
Selection 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 movements the hydraulic engine 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 up the many required output connections
An added output choice includes the result without external shaft by offering an Planetary Track Drive 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 would depend 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 (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 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.
Designed to allow mounting of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive compact.
Steel or high-effect spheroidal cast iron framework.
Primary bearings provided for high radial and axial load capacities.
Easy maintenance: filling and draining ports places easy to reach.
Front 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 monitor drives are designed for tracked automobiles 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 made for direct mounting of hydraulic plug-in motors. The careful selection of the materials and style allows our track drives, CTD and CTU, to be utilized in the most severe environmental working circumstances. Brevini planetary monitor drive units will be the perfect solution for crawled undercarriages, drilling, crushing, screening and piling devices.
Planetary Track 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 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 integral multidisc failsafe brake and will be installed 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 monitor drives, small, rugged, for construction vehicles
This gear shaft final drive comes with LO-HI speed and was created for increased performance. The item is extremely useful specifically in wheeled and tracked devices, which feature a considerably different operating/travel swiftness ratio.
Note that that is also the proper product for street paving devices, along with construction equipment and forestry machines.
Last drive motors are hydraulic motors with a speed reducing, torque multiplying planetary gear arranged. In this article, we’ll discuss planetary gear pieces, the parts that produce them up, and how they work.
Planetary Gears and Last Drive Motors
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Low Quickness, High Torque Motors
Most 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 boost torque for confirmed horsepower, we need to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One method of reducing speed involves the utilization of planetary gears. They provide speed reduction which outcomes in torque multiplication. Plus they do this all in a concise package in comparison with gear and pinion swiftness reducers, and that means they have exceptional torque density. Below you can observe a planetary gear system from a final drive motor.
Planetary gear arranged from a final drive displaying the carrier, ring equipment, sun equipment, and planetary gears
Carrier for a set 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 kept jointly by a carrier, as demonstrated in the image above. As you can plainly see, all three gears are arranged an equal distance from each other. At the guts is a location for sun equipment to mesh and provide input to the machine.
How Last Drive Planetary Gears Work
Let’s take a simplified look at how the planetary gears in your 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 the sun gear while rolling around the ring gear. The effect is low velocity, high torque output rotation.
Maintaining the Planetary Gearbox
On your final drive engine, the planetary gearbox requires equipment oil, also referred to as gear lube. It is vital to check the gear oil amounts about every 100 hours and change the apparatus oil once a year. In the event that you don’t change out your gear oil, you’ll end up with a solid sludge that will result in excessive wear of your planetary equipment system. At Texas Last Drive, we make reference to that as “pudding.”
Another key facet of maintaining your planetary gearbox can be fixing any leaking seals immediately. If a seal is certainly degraded enough to allow essential oil to leak out, after that which means dirt and dust can make their method in. You do not want your gears appear to be the gritty mess shown 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 moving. Remember to check and change the gear oil and don’t disregard leaks. And don’t forget that pudding and grit are not what you need in your gearbox!
The modern and innovative design, the compact construction and the excellent performance characteristics of the PGR/PGW group of gear units make these especially suitable for generating rubber tired or tracked self-propelled vehicles.