PB Series
Planetary slewing gearboxes for tower cranes
The PB series gearboxes are compact and robust planetary units specifically designed for tower crane slewing applications. Their reinforced construction allows them to reliably withstand the high radial loads and peak torques encountered in the most demanding construction environments.
Rated torque: 3,100 - 20,000 Nm
Reduction ratio: 3 - 2.957
Size range: 4 main models
Applications: Tower cranes, wind turbines
Main features
- Compact planetary design for high torque transmission in a small footprint
- Reinforced bearings and flanges to withstand extreme radial and axial loads
- Integrated pinion shaft made of 8620 material available on request for exceptional durability
- Special oil expansion tank for humid and corrosive environments
- Gears produced with the output shaft in one piece for maximum rigidity
- Wide range of reduction ratios suitable for different rotation applications
- Modular construction allowing for customized configurations according to needs
Product range
Our PB series comprises 4 main models covering a torque range from 3,100 to 20,000 Nm, specially designed for tower crane rotation applications and motion control in wind turbines.
Detailed technical data
| Setting | Value | Unit |
|---|---|---|
| Nominal torque | 3,100 - 20,000 | Nm |
| Reduction ratio | 3 - 2.957 | - |
| Output shaft diameter | Ø80 - Ø120 | mm |
| Output shaft length | 170 - 210 | mm |
| Degree of protection | IP65, IP66 | - |
| Serving temperature | -30°C to +120°C | °C |
| Mechanical efficiency | ≥ 94% | - |
Size chart
| Reduced size | Report range [i] | Nominal torque [Nm] | Shaft diameter/length [mm] |
|---|---|---|---|
| P.B15..L. | 4 - 2.858 | 3,100 | Ø80/170 |
| P.B16..L. | 4 - 2.858 | 5,000 | Ø80/170 |
| P.B19..L. | 4 - 2.957 | 8,500 | Ø100/210 |
| P.B23..L | 3 - 2.456 | 12,500 | Ø120/210 |
| P.B24..L | 3 - 2.456 | 20,000 | Ø120/210 |
Technical advantages
| Characteristic | Profit |
|---|---|
| Planetary design | High torque transmission in a compact size and reduced weight |
| Reinforced bearings | Exceptional resistance to high radial and axial loads from tower cranes |
| Integrated pinion shaft | Maximum rigidity and improved rotational precision |
| Expansion tank | Optimal protection against humidity and harsh environmental conditions |
| Extended range of reports | Perfect adaptability to the different rotation speeds required |
Available options
- Integrated safety brakes for holding in position
- Position sensors and absolute encoders
- Forced ventilation cooling systems
- Anti-corrosion coatings for marine environments
- Complete geared motors with matching motorization
- Custom mounting and interface kits
Areas of application
The PB series gearboxes are specifically designed for critical rotation applications:
- Tower cranes - Jib and counter-jib rotation systems
- Wind energy - Control of blade and nacelle movements
- Mobile cranes - Superstructure rotation mechanisms
- Rotating platforms - Heavy-duty industrial turntables
- Mining equipment - Rotation systems for drills and excavators
Competitive advantages
Reliability in extreme conditions
Designed to withstand the high radial loads and peak torques characteristic of tower crane slewing applications, with safety factors optimized for continuous operation in harsh environments.
Compactness and performance
Planetary technology enables high reduction ratios and high torques in a small footprint, essential for integration into tower crane systems where space is limited.
Industrial versatility
With 4 sizes covering torques from 3,100 to 20,000 Nm and ratios from 3 to 2,957, the PB series is suitable for most industrial rotation applications, from tower cranes to wind turbine systems.
Entry type
PVB Series
With AC motor
PNB Series
With IEC B5/B14 motor flange
PTB Series
With full entrance tree
Output type
PB01 Series
With solid output shaft
PBP1 Series
With integrated pinion shaft
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