Slewing Drives
QCB offer a wide range of Slewing Rings (from 100mm to 11 000mm outside diameter), Slewing Drives, Ring Gears and Pinions. With carefully selected industry partners QCB can offer turnkey rotation systems for the smallest industrial systems up to the largest offshore installations.
QCB have years of experience, backed by state of the art design software to ensure the optimum solution for your needs. We have become a trusted name in slewing ring bearings with a satisfied and international customer base in industries as diverse as mining machinery, materials handling, offshore oil and gas, access platforms, process treatment plants, wind power, special effects and art installations.
The QCB range
Slewing bearings
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 consist of 2 or 3 rings between which either spherical or cylindrical rolling elements are arranged with suitable spacers or cage. The rings incorporate mounting and handling holes, as well as integral spur, helical or worm gearing. Lip seals prevent the ingress of contaminants into the raceway.
As well as our own designs, we offer equivalents to other brands such as Torriani Gianni, La Leonessa, BRB Technologies, INA-FAG (now the Schaeffler Group), Roballo, Roth Erde, Rollix Defontaine, Avon, Taperex, Kaydon, Rossi-MRI, RKS, SKF, RIMA, IMO, Titanus, Silverthin, PSL, Drecon to name a few…
QCB has experience in the manufacture of
Single row ball bearings
Double row ball bearings
Crossed roller bearings
Combination ball / roller bearings
Triple row roller bearings
Wire race bearings
Precision rotary turntables
Harmonic reducer bearings
Ring gears
Segmented bearings and ring gears
Pinions
Pinion shafts
Not only do we have an extensive catalogue reference library, and have developed an extensive interchange system.
Slewing Drives
Essentially a slewing drive is a slewing ring mounted on a base plate onto which a worm shaft is fixed which engages on the helical or worm gear in the outer ring. Hydraulic or electric motors can be used to provide rotation.
During 2021 we will be introducing a new spur-gear based slewing drive range.
Geared motors and pinions
Geared rings require some form of drive. Working in conjunction with leading manufacturers QCB offers turnkey solutions with matched pinions, electric or hydraulic geared motors (helical-bevel, worm or planetary style), servo-motors or air motors.
Trailer rings
Low precision, large diameter bearings intended primarily for low speed articulation of off-road trailer steering axles, and light industrial applications with
intermittent movement. Trailer rings are usually manufactured in a low grade
carbon steel and are undrilled and unsealed. As such trailer rings are not
suited to applications with eccentric loads or continuous rotation.
Most QCB slewing rings use standardised nitrile or VITON lip seals to prevent
the ingress of contaminants, other sealing systems are available.
Spur, helical or worm gear profiles provide for the transfer of power if suitable
gearing is included in their design.
Slewing rings
Large diameter precision ball and/or roller bearings that can accomodate high
axial, radial and moment loads in combination while rotating or making oscillatory movements in any orientation.
Slewing rings consist of 2 or 3 rolled or forged rings between which either ball
or cylindrical rolling elements are arranged, usually separated by spacers or a
cage.
The rings incorporate drilled or tapped holes to facilitate fixation and handling.
Gearing on either (or both) rings facilitates the transmission of power.
This catalogue illustrates the standard range, much of which is stocked at all
times.
Many other QCB bearings are manufactured to special designs or derived
from samples or drawings submitted by our international clients.
Ring gears, gear segments and pinions
QCB can supply large diameter ring gears, gear segments and large pinions to order.
Worm gear slewing drives
Slewing drives consist of an externally geared slewing ring with associate worm shaft mounted on a common base plate in an open or enclosed style housing. Power is provided by hydraulic or electric geared motors. Load speed is usually restricted to around 2.5 rpm.
Spur gear slewing drives
Spur gear slewing drives offer higher rotation speeds over their worm gear counterparts of up to 20 rpm.
