Tower Crane
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This page explains how Slewing Unit is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.
A mechanical assembly that enables the rotation of the tower crane's upper structure (jib and counter-jib) relative to the stationary tower.
Technical details and manufacturing context for Slewing Unit
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Rated Torque | 100–500 kN·m | Determines the maximum load the crane can rotate. |
| Rotation Speed | 0.1–0.8 r/min | Typical operating speed for safe load handling. |
| Slewing Angle | 360 ° | Full rotation capability. |
| Hydraulic Flow Rate | 20–60 L/min | Required flow for the hydraulic motor. |
| Operating Temperature | -20–60 °C | Outside this range, seals may fail. |
| Protection Class | IP54–IP65 | Protects against dust and water jets.IEC 60529 |
| Material Grade | Q345B | High-strength structural steel for the housing.GB/T 1591 |
| Gear Hardness | HRC 50–55 | Ensures wear resistance and long life.ISO 6336 |
| Weight | 500–2000 kg | Affects crane counterweight requirements. |
| Mounting Diameter | 800–1600 mm | Must match the tower top flange. |
| Max Axial Load | 500–1500 kN | Vertical load capacity from the upper structure. |
| Max Radial Load | 200–600 kN | Horizontal load capacity from wind and load swing. |
| Max Tilting Moment | 500–2000 kN·m | Critical for stability under eccentric loads. |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
| pressure: | Not applicable (mechanical assembly) |
| other spec: | Max torque: 50-500 kNm (depending on model), Max axial load: 100-1000 kN, Max radial load: 50-500 kN |
| temperature: | -20°C to +50°C |
Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.
Quoted from the published standard.
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The slewing unit enables the horizontal rotation of the crane's upper structure (jib and counter-jib) relative to the stationary tower, allowing 360-degree load positioning.
Key parameters include rated torque (100–500 kN·m), rotation speed (0.1–0.8 r/min), max axial load (500–1500 kN), max radial load (200–600 kN), max tilting moment (500–2000 kN·m), mounting diameter (800–1600 mm), and operating temperature (-20 to 60 °C). Always verify with the manufacturer.
Common materials include high-strength alloy steel, case-hardened bearing steel, and cast steel. Gear hardness is specified as HRC 50–55 for wear resistance.
Modern units often use frequency-controlled drives that provide controlled acceleration and deceleration, ensuring smooth and precise rotation. The gear reducer and pinion mechanism also contribute to stable movement.
This component is essential for the following industrial systems and equipment:
Commonly used trade names and technical identifiers for Slewing Unit.
Editorial classification, named public sources where available, and source-reviewed manufacturer records.
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