Hydraulic planetary gearbox and slewing drive

Flag-up Hydraulic planetary gearbox and slewing drive are the "powerhouses" of heavy machinery. They combine the high-pressure force of a hydraulic motor with the mechanical torque-multiplying capabilities of a planetary gear set.

Flag-up Industrial Planelary Gerabox Series is a complete range of modular planetary gearboxes that combines high performance with low cost and size. Flag-up Industrial gearbox covers a full range of sizes that ensure optimum durabilty, quiet operation in all working conditions and efficiency to reduce operating costs and maximise availability.

1.The modular transmission system offers customers various benefits,including:

• Short lead times due to a high level of standardisation

• The torque is distributed proportionately among the sizes which means that the most suitable gearbox can be selected for every application

• High product quality

• Numerous available variants allow more flexible configuration for a wide range of applications.

• Customized variants based on the modular system

2. Output torque

T2N from 1,000 Nm to 550,000 Nm

3. Ratios:

i = 10 up to 3000 with the in-line configuration
i=10 up to 3000 with the right-angle configuration
i >3000 by combining more than 4 planetary stages

4.Casings

Flag-up Industral Planetary Gerabox series casings basically consist of an inout flange, reduction stages, intermediate coupling flanges and output supports. They are dimensioned to suit the loads transmitted through the gearbox, which increase from the input to the output.

• lnput supports: cast iron.

• Gear ring: high-quality hardened steel.

• Intermediate coupling flange: ductile cast iron.

• Output supports: ductile cast iron.

Key Applications

• MARINE

Azimuth thruster/ Fishing crane/ Deck crane/ Service crane/Boat hoist

• MOBILE

Tower crane/Concrete pump/Tow truck/Rough terrain crane/Mobile crane/Electrical Aerial/platformTelehandler

• MINING &DRILLING

Thickners/Tunnel boaring machine/Crawler crane/Drilling machine/Big drilling rig machine

• INDUSTRIAL

Sugar plant/Steel plant/ShreddersPipe tensioner/Bending machine

3. Advantages of the Planetary Design

• High Torque Density: Because the load is shared across multiple planet gears simultaneously, the gearbox can be much smaller than a traditional "spur" gearbox of the same power.

• Coaxial Alignment: The input (motor) and output (drive) shafts are on the same center line, making the unit easy to integrate into wheels or drums.

• Durability: Sharing the load across multiple teeth reduces the stress on any single gear, leading to a longer service life under heavy shock loads.

5. Technical Comparison

5. Maintenance Checklist

• Gear Oil Quality: Unlike the hydraulic motor (which uses hydraulic oil), the gearbox uses heavy gear oil.13 This must be changed regularly to remove metal wear particles.
• Seal Inspection: The "floating seal" on final drives is a common failure point; if it leaks, dirt gets in and destroys the gears within hours.
• Heat Monitoring: High-torque operations generate heat. Ensure the cooling fins (if prent) are clean of mud or debris.