Slewing rings and slewing drives are everywhere!
Slewing rings are large diameter rolling bearings that can accommodate axial, radial and moment loads in combination while rotating or making oscillatory motions. Slewing rings generally consist of 2 or 3 rings between which either ball or cylindrical rolling elements are arranged and separated by spacers or a cage. The rings incorporate mounting and handling holes, and may have integral gearing (spur, worm, timing or even chain profiles) to transfer torque. Seals prevent the ingress of contaminants into the raceway.
Automation
Accuracy and repeatability of movement are important in robotic machinery such as welding robots or welding manipulator jigs. The support bearings must be stiff yet offer smooth rotation in service.
QCB offers a range of preloaded x-roller or double row ball bearings for such applications.
ACCESS PLATFORMS
Working at height you want the confidence that the slewing ring holding you aloft has been properly designed to handle tough conditions with a good degree of safety.
QCB Slewing Ring bearings with spur, helical and worm gears and QCB Slewing Drives are used in access platforms, window cleaning machines across the globe.
LIGHT RAIL
Trams or Light Rail Systems need to snake through crowded city streets and turn more sharply than standard rail units.
QCB offers triple ring slewing ring bearings that allow the carriages to articulate independently from one another from the central point.
Small & medium wind turbines
QCB supplies a number of blade and yaw bearings for a variety of small and medium wind turbines, both to OEM and to after-market customers.
Through our partners we can also supply the relevant yaw gearboxes
HIGH PRECISION
Looking at or listening to the stars demands the highest accuracy bearings.
QCB slewing rings have found application in civilian and military radar antennae systems and radio telescopes.
OFFSHORE OIL & GAS
QCB bearings are already working on and offshore all over the world where they are expected to work for decades.
QCB has developed special seals and other designs modifications to ensure our slewing rings are the best they can be – and we deliver to shipyards worldwide for installation in hose reals, umbilicals, davit cranes, ROV LARS, mooring systems and cable carousels (land based and ship mounted).
MILITARY & DefenCE
Military bearings may have non-standard internal designs, special materials and/or coatings depending on the application which can include gun turrets, mine clearance machinery, rocket launchers, target detection and monitoring systems and cranes.
QCB slewing rings operate in all 3 services worldwide.
materials handling
Large diameter slewing rings are no problem to QCB whose slewing rings already provide reliable service across the globe in construction and mining equipment, and jib cranes (onshore and offshore).
QCB can supply slewing rings up to 11 000mm in diameter, segmented for easy transport and assembly on site.
WATER treatment & process equipment
Water treatment plants are expected to operate reliably for decades.
Trailer rings and light series slewing rings are common but better options exist to extend life, simplify maintenance and increase longevity of these bearings in service..
QCB also assists with older installations where parts are no longer available and can assist with the design of improved bearing systems.
JET BRIDGES
Jet bridges around the world, as well as other airport handling equipment benefit from using QCB slewing rings.
MARINE CRANES
Double row ball bearings can reduce bearing size while offering greater performance.
QCB stocks complete sets of slewing rings/ pinions and geared motors for a range of small ship cranes.
Larger freighter loading crane bearings have been supplied too
STRADDLE & Modular CARRIERS
Straddle carriers or Modular Transporters use QCB Slewing Drives to control the steering mechanism.
Theatre & SPECIAL EFFECTS
Whether it’s the opening ceremony for the Olympics, moving sets on a theatrical stage, supporting a 50 ton spaceship or rolling a helicopter down a mountainside, QCB slewing rings (and bearings) are there – used in the theatre and entertainment industry worldwide.
We have played our part in supporting some of the world’s greatest actors and entertainers through the years.
