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Thank you for shopping with Industrial Wheels and Castors, please note that we are currently closed due to
Christmas holidays. Please be assured that business will resume as usual on Monday the 8th of January
2018.
We will respond to all enquiries and process orders on our return.
The team at Industrial Wheels and Castors wishes you peace, joy and prosperity throughout the coming year.
The team at Industrial Wheels and Castors

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Thank you for shopping with Industrial Wheels and Castors. Please be aware that any nylon coated trolley
orders received after Friday 8th December 2017 will not be processed until business resume on Monday the
8th of January 2018.
We will respond to all enquiries and process orders on our return.
The team at Industrial Wheels and Castors wishes you peace, joy and prosperity throughout the coming year.
The team at Industrial Wheels and Castors

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IWC | NewsLoad capacity, a key consideration for wheel and castor choice

Load capacity, a key consideration for wheel and castor choice May 21, 2019 - Posted in: News

When it comes to selecting a wheel and castor there are a number of factors to consider. But probably the most important factor to consider is the load capacity.

In order to determine the required load capacity of a wheel or castor, the dead weight of the transport unit, the maximum additional load and the number of wheels and castors to be used must be known. By using four or more wheels or castors, the load bearing of the individual wheels or castors can vary. The required load capacity can be defined as follows:

T = Required load capacity of the wheel
or castor
E = Dead weight of the transport unit
Z = Maximum additional load
n = Number of wheels or castors used
S = Safety factor

The safety factor S reflects the deviation from the standard application conditions (even floor, walking speed, load must act equally on all wheels or castors, straight traveling, ambient temperatures between +15° C and +28° C). The safety factor is influenced by the speed and the ratio between wheel Ø and height of the obstacles. A distinction is drawn between four categories:

– Indoor manual transport (height of the obstacles < 5 % of the wheel Ø): Safety factor: 1.0 to 1.5

– Outdoor manual transport (height of the obstacles > 5 % of the wheel Ø): Safety factor: 1.5 to 2.2

– Indoor power driven transport (height of the obstacles < 5 % of the wheel Ø): Safety factor: 1.4 to 2.0

– Outdoor power driven transport: Safety factor: 2.0 to 3.0 Safety factors do not consider abrasion of the tread.

Speeds higher than 4 km/h with a reduced load capacity are possible for wheels and castors with ball bearings fitted. If a wheel or a fixed castor is mainly exposed to static loads, a load capacity increase up to 25 % can be assumed. With long endurance times under high loads, the danger of tread flattening must be considered. The load capacity is stated in kg. To convert it into N, the common factors need to be implied. The following equation applies approximately: 1 kg ≙ 1 daN.

So here’s a quick summary of the different types of wheels and castor capacities and what they are applicable for:

Light Duty Wheels and Castors:

Light duty wheels and castors and compact castors are mainly used with appliances and equipment for internal applications. They are designed for travelling speeds of up to 3km/h. The maximum load capacity is 280 kg for light duty wheels and castors and 1750 kg for compact castors. They fulfill all requirements for high maneuverability of the respective appliances as well as for maximum smooth rolling performance at low rolling resistance. Typical application areas are medical equipment, display bases, equipment for large-scale catering establishments, etc.
Blickle light duty wheels and castors and compact castors, which we stock,  are tested in regards of load capacity on a rotating bench in acc. to DIN EN 12530:
The most significant test characteristics are as follows:
– Speed: 3 km/h
– Temperature: +15° C to +28° C
– Hard, horizontal surface with obstacles of 3 % of the wheel diameter
– Test duration: Number of obstacles crossed corresponds ten times the wheel diameter (in mm)
– Break time: Max. 3 min after each 3 min running time

 

Wheels and Castors for Transport Equipment

Wheels and castors for transport equipment are used in the industrial sector, both indoor and outdoor. They are designed for travelling speeds of up to 4 km/h. The maximum load capacities amount to 900 kg. Transport equipment wheels and castors are insensitive to environmental influences, largely maintenance-free and run trouble-free over a long period of time. Typical application areas cover many types of equipment including pallets, working platforms, and waste containers.

Blickle wheels and castors for transport equipment, which we stock, are tested in regards of load capacity on a rotating bench in acc. to DIN EN 12532:
The most significant test characteristics are as follows:

– Speed: 4 km/h
– Temperature: +15° C to +28° C
– Hard, horizontal surface with obstacles of the following heights: 5 % of the wheel diameter for wheels with soft tread (hardness < 90° shore A) 2.5 % of the wheel diameter for wheels with hard tread (hardness ≥ 90° shore A)
– Test duration: 15.000 x wheel circumference, at least 500 obstacles crossed
– Break time: Max. 1 min after each 3 min running time

 

Heavy Duty Wheels and Castors

Heavy duty wheels and castors are used in application areas with heavy loads and/or higher travelling speeds. They have a much sturdier design. To move extremely heavy loads, two-wheel castors are also used (twin wheel castors). For vibration-free transport spring-loaded castors are particularly suitable. Typical application areas are storage and industrial trucks, assembly and transport
systems, etc.

Our range of Blickle heavy duty wheels and castors are tested in regards to load capacity on a rotating bench at 4 km/h in acc. to DIN EN 12532 and at higher speeds to DIN EN 12533:

The most significant test characteristics in acc. to DIN EN 12532 are as follows:
– Speed: 4 km/h
– Temperature: +15° C to +28° C
– Hard, horizontal surface with obstacles of the following height: 5 % of the wheel diameter for wheels with soft tread (hardness < 90° shore A) 2.5 % of the wheel diameter for wheels with hard tread (hardness ≥ 90° shore A)
– Test duration: 15.000 x wheel circumference, at least 500 obstacles crossed
– Break time: Max. 1 min after each 3 min running time

The most significant test characteristics to DIN EN 12533 are as follows:
– Speed: 6 km/h, 10 km/h, 16 km/h, 25 km/h (norm: max. 16 km/h)
– Temperature: +15° C to +28° C
– Hard, horizontal surface with obstacles of the following height: 5 % of the wheel diameter for wheels with soft tread (hardness < 90° shore A) 2.5 % of the wheel diameter for wheels with hard tread (hardness ≥ 90° shore A)
– Test duration: Number of obstacles crossed corresponds five times the wheel diameter (in mm)
– Break time: Max. 1 min after each 3 min running time