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IMO Slewing Rings For Cranes

‘Slew on the Safe Side’



Customer specific IMO slewing rings have been impressing the crane industry for more than 25 years with their long service life and reliability. Slewing Rings are large diameter antifriction bearings for the simultaneous transmission of axial and radial forces as well as tilting moments. They replace traditional solutions with fixed and floating bearings as well as king pin bearings. Frequently, this results in bearings with axial/radial bearing combinations with one bearing point. This can significantly simplify the design of the mounting structure and the installation of the bearings, which in turn reduces effort and costs.


IMO Slewing Rings

  • Diameters over 6m
  • External gears, internal gears or without gears
  • Single row and double row ball slewing rings
  • 3-row roller slewing rings
  • Gear rims
  • Customer-specific versions


Examples of IMO Slewing Rings for Cranes in action


Handling Crane


 Mobile Crane     


 Harbour Crane           


Construction Crane


IMO Slewing Rings provide a variety of benefits including:  

For purchasing

  • Focus on cost-efficient solutions
  • Delivery times you can rely on
  • Short reaction times


For engineering

  • Customer-specific versions
  • Special seals to protect from dirt and coarse particles
  • FE analysis of adjacent structure


For service

  • Reduced servicing costs
  • Long service life
  • Worldwide service & spare parts


For end customers

  • Tailor-made sturdy solutions
  • High levels of operational safety
  • Highest level of resilience
  • Low overall costs



Below are a couple of examples of the IMO Slewing Ring being utilised in the working environment that it was expertly designed for.


*IMO Slewing Ring for cranes example 1.


 An IMO double row ball slewing ring is used in this loading crane


IMO Slewing Ring for cranes example 2.


The superstructure is rotated using an IMO single row slewing ring with external gear.


IMO Slewing Ring for cranes example 3.


 An IMO ball slewing ring with external gear rotates this crane trolley on an aluminium smelter crane


Neilson Hydraulics is proud to be an official IMO UK distributor. We have a highly experienced technical team available to help and discuss your requirements and provide you with solutions. Please view https://www.neilson-hydraulics.co.uk/imo-slewing-rings.html for further information on IMO Slewing Rings but also contact Neilson Hydraulics on: 01709 821002 / E: sales@neilson-hydraulics.co.uk.




Neilson Hydraulics is an IMO UK distributor. Neilson Hydraulics supplies IMO Slew Drives, including IMO Slew Drives WD Series (WD-L & WD-H) and IMO Slew Drives SP Series (SP-I & SP-H), as well as IMO Slewing Rings, including IMO Ball Slewing Rings, IMO Roller Slewing Rings and IMO Ball-roller Combination Slewing Rings.