A guide on helping you select the best castor or wheel for your chosen application.
1 Choose the range based on what you are using it for, and how much load it will carry.
Light to medium duty—L series, Twin series, N series, Metal ball, K series, M series and Big M series
Load rating: 25-200 kg
Trolleys and carts
Shop fittings and displays
General duty to heavy duty—J series, Y series and O Series
Load rating: 200-500 kg
Very heavy duty—W series, X series, V series and A Series
Load rating: 500-3500 kg
Stock trolleys for automotive plants
Multi-purpose industrial trolleys
Medical—Trinity and Trinity EBC, Central Locking, Wheelchair
Load rating: 100–150 kg
Medical equipment, hospital beds and other applications that need an
automatic or accessible brake
Mobile computer tables
2 Choose a wheel, based on the floor surface it will be travelling on.
Outdoors and rough ground
Bouncy, elastic tyres help get over bumps. That's why wheelbarrows and other equipment uses on rough grounds are fitted with pneumatic or rubber tyres.
Soft surfaces and smooth floors
Hard wheels have high load bearing capacity and reduce push effort on carpet and soft surfaces. They tend to be very noisy on tiles and other hard surfaces, and can also leave indentations on wooden floors.
Variable floor surfaces
Road cases are a classic example of tyres that need to adapt to a wide range of floor surfaces. When bands are on the move, their equipment needs to travel over bitumen, carpet, lino, wood and over curbs and stairs. These wheels go everywhere! Another example is wheeled luggage.
Some applications have specific requirements, and we have a wide range of specialised wheels to suit. Our range caters for high and low temperatures (eg. ovens and freezers), wheelie bin wheels, central locking castors, anti-static wheels and many more.
3 Choose the diameter of the wheel.
The larger the wheel, the easier to push and the better the ride comfort (ability to pass over bumps and to minimize vibration).
Why? The larger the wheel, the smaller obstacles are in proportion to the wheel's diameter, resulting in greater momentum.
Wheel diameter should be maximised, bearing in mind that:
As a rule of safety a maximum height of 1400 mm is recommended (including the goods being carried) to enable a clear line of sight.
Small wheels are sometimes used to reduce the centre of gravity to address tip hazards due to top-heavy loads.
4 Choose the bearing type.
Used in applications where heat can build up due to friction caused by constant movement and/or higher speeds—all towing applications use precision bearings (as the high tolerance and hardened steel used in the sealed and greased bearings reduces heat build-up that can cause weakening of the wheel).
Ball bearings offer the lowest friction and therefore the lowest push effort—they are also the most expensive type of bearing in our range.
Used in high impact applications (the large surface area of the bearing spreads load and therefore protects against high impact). Not suitable for high speed (more than 6 km/h).
Plain bush (or bore) bearing
Used in corrosive environments (polymer bearings won't rust). Also used to reduce cost (the cheapest kind of 'basic' bush).
5 Choose the type of brake and castor configuration.
Castor configuration options
World's best practice
Trinity EBC with intuitive steer, automatically apply the steering device in the right direction, with the use of a motion sensor.
Trinity complete brake (CB) castors have a 3-in-1 brake that includes a direction lock option to steer from either end.
6 Choose your fittings.
Bolt hole fittings
Suitable for installing into tubular legs. We have a full range of expanding adaptors, pintle bolts, threaded tube ends, grip neck and friction stems and solid pintles, all designed to work seamlessly with any bolt hole castor.
Washer mount (for bolt hole)
Suitable for mounting bolt hole castors into equipment that do not have tubular legs.
Suitable for mounting onto equipment that have smooth flat surfaces, such as sheet metal or wood.
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