Brand Overview

QCB is a globally recognised engineering brand, trusted for manufacturing high-quality slewing rings, slewing drives and rotational solutions for OEMs and maintenance engineers worldwide. Designed to deliver exceptional performance, long service life and outstanding value, QCB products are manufactured in ISO-audited facilities and supported by rigorous quality control procedures. The brand has built an international reputation across industries including construction, renewable energy, offshore, mining, defence, material handling and industrial automation.

As an authorised distributor, NBC Group provides expert technical support, application advice and access to both standard catalogue products and bespoke engineered solutions. Whether you require a direct replacement bearing or a custom-designed rotational system, our engineering team can help specify the ideal solution.

QCB Product Range

QCB offers one of the industry’s most comprehensive ranges of slewing rings and slew drive products, suitable for both standard and specialist applications.

Slewing Rings

• Single Row Ball Slewing Bearings
• Double Row Ball Slewing Bearings
• Crossed Roller Slewing Bearings
• Triple Row Roller Bearings
• Combination Ball & Roller Bearings
• Wire Race Bearings
• Precision Rotary Turntables
• Internal, External and Ungeared Designs
• Ring Gears and Gear Segments
• Pinions and Pinion Shafts

Slewing Drives

• Worm Gear Slewing Drives
• Spur Gear Drives
• Helical Gear Drives
• Rotation Drive Assemblies
• Complete Drive Packages with Hydraulic or Electric Motors
• Custom Engineered Drive Systems

Many products are available from stock, while bespoke designs can be manufactured to meet specific load, speed, environmental or dimensional requirements. QCB also offers interchange solutions for many leading global slewing bearing manufacturers, making replacement straightforward.

Applications

QCB Slewing Rings and Drives are engineered for demanding environments where precise rotational movement, high load capacity and reliability are essential.

Typical applications include:

• Mobile & Tower Cranes
• Excavators & Construction Equipment
• Access Platforms & Cherry Pickers
• Wind Turbines & Renewable Energy Systems
• Quarry & Mining Machinery
• Offshore Oil & Gas Equipment
• Material Handling Systems
• Industrial Automation & Robotics
• Defence & Military Equipment
• Food Processing Machinery
• Film & Television Motion Systems
• Agricultural Machinery
• Waste & Recycling Equipment
• Water Treatment Plants
• Special Effects & Architectural Installations

Their ability to withstand combined axial, radial and overturning moment loads makes QCB slewing products ideal wherever controlled rotational movement is required.

Technical Information

QCB Slewing Rings combine bearing and gear technology into a compact assembly, reducing component count, simplifying machine design and improving reliability. Available in diameters from approximately 100 mm to over 10,000 mm, they can be supplied with internal gearing, external gearing or without gears to suit virtually any application.

Key Features

• High axial, radial and moment load capacity
• Smooth, accurate rotational movement
• Precision manufactured raceways
• Multiple gearing options available
• Sealed to protect against contamination
• Heat-treated raceways for extended service life
• ISO-audited manufacturing
• Material certificates and inspection reports available on request
• Standard catalogue and bespoke engineered designs
• Worldwide technical support from NBC Group

Our engineering team can assist with:

• Bearing selection
• Load calculations
• Design optimisation
• Reverse engineering
• Replacement bearing identification
• CAD drawings and technical support
• OEM project development

Frequently Asked Questions

What is a slewing ring?

A slewing ring is a large-diameter bearing designed to support axial, radial and overturning moment loads while allowing smooth rotational movement. Many designs also incorporate gearing for power transmission.

What is the difference between a slewing ring and a slew drive?

A slewing ring is the bearing itself, while a slew drive combines the slewing ring with an enclosed drive mechanism such as a worm gear or pinion to provide controlled powered rotation.

Can QCB manufacture bespoke slewing rings?

Yes. Alongside an extensive standard range, QCB designs and manufactures bespoke slewing rings and slew drives to suit specific load requirements, dimensions and operating environments.

Which industries use QCB slewing rings?

QCB products are widely used in construction, mining, offshore, renewable energy, defence, agriculture, material handling, industrial automation, food processing and many other industries requiring reliable rotational movement.

Can NBC Group help identify a replacement slewing ring?

Yes. Our technical specialists can identify replacement bearings from part numbers, dimensions or engineering drawings and recommend direct interchange or upgraded alternatives.

Are quality certificates available?

Yes. QCB products are manufactured in ISO-audited facilities, with material certificates, inspection reports and traceability available for many products where required.

Do you supply complete slew drive systems?

Yes. NBC Group supplies complete slew drive assemblies, including worm gear, spur gear and motor-driven systems, together with matched pinions and accessories for OEM and replacement applications