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Tow balls
Ball hitches on vehicles are devices for towing that are permanently installed. They are also known as ball couplings or tow balls. They are mounted onto towing vehicles such as cars, trucks, vans or tractors to enable them to pull trailers. Special hitch balls for trucks are available. Tow balls must be approved in accordance with EU Directive 94/20 and have an ‘E’ certification mark. This means that TÜV inspection and approval is no longer required.
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Code no.: 620183
- Supporting load: 200 kg
- D-Value: 22.7 kN
- Hole pattern: 83 x 56 mm
€86.50
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Code no.: 620223
- Supporting load: 200 kg
- D-Value: 20.2 kN
- Hole pattern: 83 x 56 mm
€149.90
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Code no.: 620243
- Supporting load: 270 kg
- D-Value: 22.1 kN
- Hole pattern: 83 x 56 mm
€159.00
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Code no.: 620253
- Supporting load: 270 kg
- D-Value: 22.1 kN
- Hole pattern: 83 x 56 mm
€119.00
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Code no.: 620073
- Supporting load: 375 kg
- D-Value: 31 kN
- Hole pattern: 83 x 56 mm
€119.00
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Ball couplings for flexibility
A forged steel tow ball consists of a support with a standardised ball measuring 50 mm in diameter. The trailer has the matching counterpart with a lockable ball seat. It sits on the ball hitch so that it can swivel and the lock prevents it from lifting off. This means that the trailer can flexibly follow the movements of the towing vehicle. Ball hitches can cope with a wide range of rolling loads. Cars are often fitted with removable or swivelling models. Truck hitch balls are also available. Hitch balls are also available as a combi version with an integrated drawbar coupling. The maximum towing capacity of the tow hitch depends on the vehicle used and the D-value. We will explain the D-value in more detail later.
Quick and easy installation
Ball hitches for trailers are attached to the point on the vehicle’s bodywork designated by the manufacturer. This is the only point that can cope with the maximum towable weight. The support is screwed onto the vehicle. Tow balls for two and four hole attachment are available. The ball hitch on the screw plate can be mounted at different heights. This ensures the correct positioning on the bodywork.
Combined ball and pin coupling systems are universal. The interchangeable plate is installed permanently, but the hitch is detachable. Different types of hitch can then be attached to the interchangeable plate.
Formula for calculating the D-value: find the right ball hitch for your needs
You can find this value on the rating plate of your tow hitch. It does not change and forms the basis for calculating the maximum permissible towable weight. Additional factors in the calculation are the permitted gross vehicle weight of the towing vehicle and the trailer. As a result, the towing capacity can be different for a different trucks or tractors even if the hitch is the same. This is the formula:
(total weight of truck x maximum towable weight x 9.81) divided by (total weight of truck + maximum towable weight)
The result must not exceed the D-value of the trailer hitch. Heavy trucks, tractor units or tractors are capable of towing heavier loads.
Calculating the maximum trailer weight:
(D-value x permitted gross weight of truck) divided by (permitted gross weight of truck x 9.81 - D-value)
Maximum permitted drawbar load: Important!
The drawbar load reduces the permitted gross vehicle weight of the towing vehicle. The specified maximum drawbar load must always be deducted from the permitted gross vehicle weight of the vehicle. However, there is one exception: the maximum permitted gross weight of the trailer is greater than the maximum towing capacity of the towing vehicle.
Buy ball hitches at an affordable price online in the ProLux Shop
We offer sophisticated tow hitches from various brands at great prices! Our range also includes practical accessories and spare parts. Why not take a look?
