The Schaeffler Group has launched Cronitect, a stainless steel for rolling bearings.
Cronitect provides maximum corrosion resistance under extreme operating conditions, including dry-running applications or when bearings come into contact with aggressive media such as water, salt spray, acids and cleaning chemicals.
Cronitect steel is a high-grade martensitic hardening steel that is based on the consistent refinement of high-grade Nirosteels and uses a thermo-chemical surface layer treatment process.
Even after 600 hours of salt spray testing in accordance with DIN 50021 SS, the material shows no signs of corrosion, according to the company.
Cronitect is suitable for a range of industrial applications, including food and beverage processing, materials handling, heavy machinery (e.g gear pumps, flow dividers), power transmission systems (gearboxes), hydraulic and pneumatic systems, consumer products and packaging.
Rolling bearings that use Cronitect are available in both sealed and non-sealed versions.
When used in conjunction with ceramic rolling elements, Cronitect bearings are particularly suitable for dry running operation.
One version of Cronitect combines conventional stainless steels such as AISI440C for the rolling elements with Cronitect rings and bearing seals.
In this configuration, the focus is on extended life under insufficient lubrication and on emergency operating features.
In food processing, the use of Cronitect increases the availability of machinery, providing extended maintenance intervals and presenting no risk of contamination of foodstuffs.
In sports and fitness equipment, rolling bearings must provide corrosion resistance, while on fitness machines, friction has to be minimised to ensure smooth running properties.
Here, the use of Cronitect eliminates the need for grease lubrication and complex, high-friction seals.
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