ball transfer units are used a wide range of applications. The most common include: 

  • airport loading and unloading equipment 
  • metal sheets working machines
  • hydraulic presses
  • ball tables
  • lifting platforms and equipment 
  • mechanical conveyors
  • marble and ceramic working machines
  • conveyor trolleys
  • pallet rack and containers
  • movable walls
  • sliding gates
  • sliding doors and windows
  • equipment for robotics, electronics and automation 
  • car stands



  • Position and assembly of the component: the product can be assembled with the load sphere facing upwards, downwards or according to the type of use required.
  • Working temperature: depending on what type of material they are made of, the balls can react to loads in different ways. 
  • Working environment: different contaminating factors (dirt, dust, humidity etc.) can influence the yield of the product.
  • Load (size, hardness, surface, stability etc.) to which the product will be subjected.
  • Additional aspects such as speed, frequency and duration of the loads handled.

POSITIONING Fixing and positioning are performed with the usual insertion in pre-established holes or resting on the base, by means of screws and rivets in the versions with fixing holes or through internal or external threads. Two versions of fixing rings in fixed or removable types are available for locking in the seats. We also have a special a version (called SPM-R) with a predetermined height groove for the insertion of the fixing rings according to DIN 471, which allows the locking in holes made on support surfaces of variable thickness. On request it is possible to make this groove at different heights and on different types of transfer balls. 

LAYOUT Usually ball transfer units are used with three layouts: 


CONSTRUCTION RGPBALLS ball transfer units are multidirectional systems for the linear handling of loads. They consist of a large ball that rolls on a defined quantity of small diameter balls, all enclosed in a hemispherical seat. Thanks to the care with which the various components are processed, friction is particularly low, thus allowing the strength required to move the loads to be significantly reduced. The production range starts with a main ball of 8 mm diameter up to a maximum of 90 mm, which can be made of different types of materials such as steel, stainless steel, pressed metal sheet and plastic materials. Among the versions made, different types of coatings are also available, which are useful to preserve oxidation resistance over time. Even the balls used can be chosen from different types of materials according to the final application. All components can be assembled in different materials, to meet any specific final use. 

RGPBALLS mainly produces two “families” of ball transfer units: 

  • Hardened machined steel housing (turned from bar): they are normally used to handle heavy loads, strong stresses, impacts and severe conditions in general. For high flow rates, similar versions are available specifically designed for these applications.
  • Pressed metal sheet components: they are instead preferable in applications which involve lower loads. They combine good smoothness at adequate flow rates, allowing a cheaper final price.

Many versions feature a felt seal that helps keep the major ball clean when rotating, thus preventing impurities from coming into contact with the recirculating balls. They usually have one or more drain holes on the bottom to facilitate the escape of impurities, liquids, condensation, etc. They are normally supplied pre-lubricated to facilitate their conservation if not used. They do not require lubrications, even periodically applied. For particularly critical conditions of use with the presence of dirt, it is advisable to provide cleaning by applying a common release / lubricant such as WD-40.


Information is being prepared