According to the definition of the liability of manufacturers for the products they produce, as given in the “Law of Liability for Products” (§ 4 Prod-HaftG), the following information about wheels and castors applies. Deviation from this information, as is written, releases the manufacturer of it's liability.
1. Product Information and Determined Uses
Wheels and castors, according to this definition, are components that are generally replaceable. They are installed on equipment, furniture, material handling system or similar products to make these products mobile. This product information refers to castors and wheels, particularly to swivel castor (not steered castors) which are used on non-powered equipment; at a speed not to exceed the normal walking speed and not being used continuously. Castors and wheels, according to this product information, can be classified by application into the following categories:
i. e. seating furniture
i. e. shopping carts, office equipment
i. e. beds, carts, etc.
i. e. material handling of all load capacities
Castors and wheels can have a long and trouble free life if the following criteria are adhered to:
- Correct and secure mounting at the designated location. The mounting location must have adequate strength and material for a positive attachment.
- The operation of the castor must not be affected by the attaching.
- The swivel bearing king pin axis must be vertical at all times.
- Rigid castors must have their wheel axles perpendicular to the direction of travel.
- If only swivel castors are used, they must be of similar types.
If rigid castors are used in conjunction with swivel castors, all castors must be compatible and in accordance with the specifications recommended by the manufacturer.
Where castors are used in these environments: Outdoors, coastal areas, corrosive and/or aggressive environments special components must be specified.
For use in temperatures below 5 °C (40 °F) and above 30 °C (85 °F), the performance of the castor can be impaired, particularly the load capacity, as stated, can be affected when used in temperatures below or above these stated limits. Special components must be specified. Castor are made of component parts. The manufacturer is only liable for the original components incorporated in the assembled castor.
When selecting a castor, it is necessary to take into consideration the technical details in the published charts for that castor.
The word, “misuse” is defined as: - Overloading - Unsuitable floor conditions - Foreign objects penetrating the wheel tread - Excessive (high or low) temperatures - Failure to use brakes properly - Exposure to a caustic environment - Excessive shock loading - Excessive speed - Influence of lateral forces - Changes made to the components and to assembled castors without prior agreement and approval of the original manufacturer
3. Product capability
Should the user not find the required product in the manufacturer's catalogs, leaflets, descriptive literature, etc., then any new castor designed for a particular application has to be fully approved by the manufacturer. New designs must be subject to the relevant EN 12527-12531 standards.
The maintenance of castors is usually: Regreasing the axle and swivel bearings and removing any debris from these areas. Retightening the axle and/or any adjustable fittings. If cleaning agents are used, these agents must not contain corrosive or granular elements.
5. Product Information and User Guide
It is necessary to insure that the Product Information is made available as required and that the reseller insures that his customer is furnished with the appropriate catalogs, etc.; that the Original Equipment Manufacturer, on who's equipment the products is attached, insures the end user has received the Product Information. To insure proper performance of the castors and wheels, the reseller must consider the Usage information. This product information can be supplied for distribution to the manufacturer of the equipment. The manufacturer of the equipment must refer to the Usage information. Copies of this Product Information may be ordered from the castor manufacturer for distribution to the end user.
Dimensions in this catalog are approximate. They are subject to change without notice, particularly as a result of new designs or improvements.