"Available in diameters from 100mm up to 7,000mm for solid designs and up to 12,000mm in segmented designs
MAC offers high quality Slewring Bearings ranging from 100 mm ID up to7000 mm ID for critical Steel Plant applications, such as Laddie Turret , Steel Processing Centres, Steel Coiling Machines in  cold  and  hot  rolling  mill  applications.  High  Temperature Grease  and  Sealing  options  are  available  for  the  Steel  Plant Industry.  Stacker reclaimers, radar, gun turret, battle tank, rocket launcher, robots, wind mills, antenna, nuclear reactor, construction equipment, cranes, cement plant, paper mills, Amusement parks, mining equipment, medical equipment, machine tools, water treatment plant, material handling equipment, foundry equipment, windmill tunnel, off-shore, aerial devices. 

Few Application

STACKER RECLAIMERS
LARGE MINING TRUCKS
WINDMILLS
GROVE CRANES
Manufacturing & Processing

Different type of Slew Bearings

Miniature Slew Ring Bearings


Miniature slew ring bearings are available in different configuration as shown above.They are available with inner diameter starting from 37mm and up to 150.419mm and with outer diameter up to 192.481mm. The mounting bores have Ø 3.5mm through-hole, tapped hole or countersunk head bore are possible too. Detailed dimension and load rating etc. available upon request


Standard Slew Ring Bearing

Bearing size ranging from 100mm-7000mm diameter is available. There slewring Bearings are in Ball type, Cross Roller type,  Triple  Row  type,  Double  Row  type  and  a  combination  of Ball and Roller type slew bearings.  
WITHOUT GEAR
DOUBLE ROW
COMBINED BALL & ROLLER TYPE
CROSS ROLLER TYPE
EXTERNAL GEAR
INTERNAL GEAR
THREE ROW ROLLER BEARINGS
WORM DRIVE SLEWING RING
INTERNAL GEAR
WITHOUT GEAR
CROSS ROLLER WIRE TYPE
WIRE RACE BEARING

Large Diameter Slew Ring Bearings


As a result of their flexible capabilities, the rugged large diameter Slewing Bearings offered from Mac are already operating in different applications and industry sectors. Harsh environment, significant high load cases, specific turning characteristics and high lifetime requirement needs suitable solutions. Our scope of supply in the field of large diameter Slewing Bearings contains Ball and Roller Slewing Bearings, with and without gear as well as customized solutions with integrated drives. No matter if you are interested in a new design or an urgently required spare part, with internal or external gears, even toothed belt or helical gears: with a diameter up to 7000 mm MAC offers a suitable drive solution for nearly every application.
Features and benefits of Slew-Ring Bearings offered by MAC:

  • Maximum outer diameter of 7000 mm
  • Internal and external gear up to module 30
  • Ground gears, toothed belt gears and other on request
  • Certified to meet EN 10204 requirements for materials, dimensions and operating specifications
  • Corrosion resistant version
  • Customized solutionsRapid design of prototypes
  • Identical replacement parts for your ball and/or roller Slewing Bearings
  • Short delivery times

 Ball Slew Ring Bearings single row/double row

  • Designed for average axial forces and tilting moments as well as high radial forces
  • Compared with the single-row version, the double row bearing can support higher loads at the same diameter
  • Applications: Mechanical engineering, construction equipment, wind turbines and ship loading/unloading applications
Single Row Ball Slew Ring Bearing
Double Row Ball Slew Ring Bearing

Double-Axial Ball Slew Ring Bearing

  • Simple and robust design with sufficient clearance
  • When tilting moments quickly change their amount and location
  • Where the slewing ring is subjected quick and continuous load changes
  • Applications: Open pit mining machinery like bucket-wheel excavators
Double-Axial Slew Sample Diagram

Three-Row Roller Slew Ring Bearing



  • Used in highly demanding conditions
  • High static and dynamic load-carrying capacities
  • Applications: Rolling mill equipment, heavy-duty cranes and tunnel boring machines, mining machineries, etc,.
Three-Row Roller Slew Sample Diagram

Cross-Roller Slew Ring Bearing



  • Used to support high radial forces as well as average axial forces and tilting moment loads
  • Zero clearance and uniform bearing friction
  • Applications: Mechanical and plant engineering, medical device and antenna equipment
Cross-Roller Slew Sample Diagram

Combi Slew Ring Bearing

  • Used in conditions of high axial forces and relatively low tilting moment loads
  • Applications: Bulk handling and conveyance equipment
Combi-Slew Sample Diagram

We have various types of bearings for your applications; however, if you do not find what you’re looking for please do not hesitate to contact us directly.

We can help for any Special Design and customized configurations of Bearings, which is supplied at no extra cost. Our free expertise will assist you on right product selection. 
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