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 enables the hydraulic motor be mounted off center
Right angle input moves 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 the many required output connections
An added output option 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 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 (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 more than the roughest and steepest terrain.
Designed to allow installation of plug-in motors.
Integral multi-disc parking brakes, while still keeping the drive small.
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 side mechanical seal designed specifically for the earth-moving devices.
Maximum Torque Up to 170,000 Nm
Transmission Ratio Up to 230 iN
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Brevini planetary monitor drives are made for tracked vehicles and earth-moving devices. They possess a heavy-duty casing, a short overall length, and great radial and axial load capability.
Our gearboxes are given with essential multidisc parking brake and have been made for direct mounting of hydraulic plug-in motors. The careful choice of the components and style allows our monitor drives, CTD and CTU, to be utilized in the most serious environmental working conditions. Brevini planetary monitor drive units will be the perfect option for crawled undercarriages, drilling, crushing, screening and piling machines.
Planetary Track and Wheel drives
The present day and innovative style, 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 may be installed on hydraulic Planetary Track Drive 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 machines, which feature a significantly different operating/travel velocity ratio.
Note that this is also the right product for street paving devices, along with construction apparatus 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 sets, the parts that make them up, and how they work.
Planetary Gears and Last Drive Motors
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Final Drive Motors and Gears
3 Things You Should Know About Gear Oil for Final Drives
How to Troubleshoot an Overheating Gear Box
Low Speed, High Torque Motors
Most of the hydraulic motors used for propel motors are low-speed, high-torque (LSHT) motors. Rate and torque are related by power:
Power = Speed x Torque
That means if we want to increase torque for confirmed horsepower, we have to reduce speed:
Torque = Power / Speed
Hence the term “low-speed, high-torque.” One way of reducing swiftness involves the usage of planetary gears. They offer speed reduction which results in torque multiplication. Plus they do this all in a concise package when compared to gear and pinion velocity reducers, and that means they have superb torque density. Below you can see a planetary gear program from a final drive motor.
Planetary gear arranged from your final drive displaying the carrier, ring equipment, sun gear, and planetary gears
Carrier for a set of three 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. In addition they mesh with a stationary band gear. The upper set of planetary gears are held jointly by a carrier, as proven in the picture above. As you can plainly see, all three gears are arranged an equal distance from each other. At the center is a place for sun gear to mesh and provide input to the machine.
How Final Drive Planetary Gears Work
Let’s take a simplified look at how the planetary gears in a final drive work. Input power causes sunlight gear to rotate at high swiftness. The planets mesh with both sun gear and the ring gear. They orbit sunlight gear while rolling around the ring gear. The result is low acceleration, high torque output rotation.
Maintaining the Planetary Gearbox
On a final drive motor, the planetary gearbox requires equipment oil, also referred to as gear lube. It is vital to check the apparatus oil amounts about every 100 hours and change the apparatus oil once a year. If you don’t change out your gear oil, you’ll end up with a thicker sludge that will lead to excessive use of your planetary equipment system. At Texas Last Drive, we make reference to that as “pudding.”
Another key aspect of maintaining your planetary gearbox is usually fixing any leaking seals immediately. If a seal is certainly degraded enough to allow 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 shown 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 have to keep your machine shifting. Be sure you check and modify the gear oil and don’t ignore leaks. Also keep in mind that pudding and grit are not what you need in your gearbox!
The modern and innovative style, the compact construction and the wonderful performance characteristics of the PGR/PGW series of gear units make these especially ideal for traveling rubber tired or tracked self-propelled vehicles.