These bearings, improperly called ”pulleys”, have the outer race built with a shape that is suitable for the side containment of “FLYER” pull chains, and are typically used as lifting systems on lift truck masts.
They are built with entirely-filled cylindrical rolls, so that they can support very high radial loads.
Axial loads generated by the chain rail are supported by the correct coupling of the roller heads used in bearings, with the rectified side surfaces of races.
This rolling system is highly reliable even when extreme performances are requested.

General Specifications

Materials

Outer races: Steel UNI 20MnCr5 casehardened and tempered with final surface hardness 60±2 HRc
Inner races: UNI 100Cr6 tempered and annealed steel with surface hardness equal to 60±2 HRC
Rolling bodies: UNI 100Cr6 tempered and annealed steel with surface hardness equal to 62±2 HRC

Tolerances: According to DIN 620 standard
Precision class: Compliant with P0 class
Tip clearances: According to DIN 620 standard
Load factors: Calculated in compliance with ISO 76 and ISO 281 standards

Alternative designs:

– pulleys for high and low temperatures applications
– pulleys for applications in aggressive environments
– tailor-made based on customer’s drawing

Click on the picture to magnify it

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Kombinierte Kurvenrolle