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Track rollers from Schaeffler ensure reliability of container capping systems

18 February 2024

AROL uses INA stud type track rollers from Schaeffler on its container closure systems to help extend their operating life and minimise downtime. The sealed, cage-guided stud type track rollers reduce the pressure and stress on the mating track, reducing wear on system components.

For more than 20 years, Italian company AROL S.p.A has been relying on stud type track rollers and other bearing solutions for the food industry from Schaeffler. The INA track rollers help to extend the operating life of high-speed container closure systems used for the capping of food, wine, spirits, chemicals and personal care products. 

Founded in 1978 in Canelli, Italy, AROL produces more than 700 customer-specific closure systems per year and has over 25,000 installed systems, making it the world’s largest specialist in customised capping solutions for bottles, jars, dispensers, canisters and other containers made from glass, metal and plastic. 


AROL closure systems must function reliably under challenging conditions and in continuous around-the-clock operation. Clock rates of up to 100,000 units per hour and regular cleaning cycles using aggressive media require extremely rugged components that provide maximum efficiency and stability. Compliance with the strict hygiene guidelines of the food industry must be guaranteed. The requirements for the bearing solutions installed in the closure systems are equally high.

During the capping process, the linear movement of the capping heads is achieved by means of a rotating cam acting on stud type track rollers. Kinematic conditions require cage-guided stud type track rollers to reduce the pressure and stress on the mating track and to extend the operating life of the systems. It is also essential that all bearings are reliably sealed to prevent penetration of particles and the loss of bearing lubricant.

Michele Sonzini, Schaeffler Technology Centre Manager in Italy comments: “For our customer AROL, performance and reliability have always been indispensable requirements for international success. This applies to all the components that AROL produces in-house or purchases for its machines. It also applies to relationships with suppliers. For over 20 years, AROL has relied on bearing solutions from Schaeffler – and on collaboration that is always a partnership.”

The INA KR-PP stud type track rollers from Schaeffler have an optimised profile on the outside surface of the outer ring. This reduces the Hertzian pressure and edge loads created by tilting on the mating track, which in turn reduces wear between the outer ring’s outside surface and the mating track.

Stud type track rollers are also sealed on both sides by a three-stage seal with an axial sliding contact between the outer rings and the contact washers. This minimises wear and reduces grease consumption. Series KR-PP stud type track rollers are the ideal choice as standard catalogue products for the demanding requirements of the food, beverage and packaging industries. The seals effectively prevent loss of lubricant, which means the equipment can be operated without contamination from lubricant leakage and the lubricant remains where it is needed – inside the bearing.

Another positive effect of the seals is that they protect the inside of the bearing from penetrating media. This significantly increases the service life of the bearing, which supports longer maintenance intervals. Optional solutions made from corrosion-resistant steel or with coatings to protect against aggressive cleaning agents and moisture are possible.  

The stud type track rollers are also easy to install due to the hexagonal socket on both sides. 

Schaeffler solutions for food, beverage and packaging
Whether catalogue bearings or tailor-made, ready-to-mount units, the customer’s application and benefits are top priorities for all Schaeffler products. This includes freedom from maintenance, a reliable operating life, and perfectly matched components and sub-systems. Schaeffler also offers the right lubricants for bearings in food production, including NSF-H1, kosher and halal certified products. 

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