Slewing drives are compact, high-torque rotation systems integrating a worm gear reducer, slewing bearing, and sealing system. They convert radial/axial loads into smooth 360° motion – the "power heart" of heavy machinery.
How Does a Slewing Drive Work?
1.Power Input: Electric/hydraulic motor drives the worm shaft.
2.Gear Reduction: Worm wheel reduces speed (ratios 5:1 to 300:1), amplifying torque.
3.Load Transfer: Outer ring (fixed) absorbs axial/radial loads; inner ring rotates the platform.
4.Self-Locking: Worm gear design prevents back-driving (critical for safety!).
1.Function: Bearings only support loads; drives add controlled rotation.
2.Complexity: Drives include gearing + motor interface.
3.Cost: Drives cost 3-5x more but replace entire motion systems.
Industry Insight: “Slewing drives cut crane installation time by 40% vs traditional hydraulic systems.” – Liebherr Engineering Report 2025
Top 3 Applications
1.Solar Trackers: Precision positioning (±0.1° backlash) for PV panels.
2.Cranes: 360° rotation under 50-ton loads.
3.Satellite Antennas: Wind-resistance up to 200 km/h.
Pro Tip: For high-cycle applications (e.g., solar farms), choose drives with ISO 281:2010 L10 life >100,000 cycles.