COMPACT RAIL (pdf; EN) - Rollon

5 Technical instructionsStatic loadThe radial load capacity rating, C 0radthe axial load capacity rating C 0ax, andmoments M x, M y, M zindicate the maximum permissible values of the load(see pg. 12ff), higher loads will have a detrimental effect on the runningquality. A safety factor, S 0, is used to check the static load, which takesinto account the basic parameters of the application and is defined morein detail in the following table:Safety factor S 0Fig. 73No shock nor vibration, smooth and low-frequency reverse,high assembly accuracy, no elastic deformations1 - 1.5Normal installation conditions 1.5 - 2Shock and vibration, high-frequency reverse, significant elastic deformation 2 - 3.5The ratio of the actual load to maximum permissible load may be as largeas the reciprocal of the accepted safety factor, S 0, at the most.P 0rad1≤P 0ax1≤M 11≤M 21≤M 31≤C 0radS 0C 0axS 0M xS 0M yS 0M zS 0Fig. 74The above formulas are valid for a single load case.If two or more forces are acting simultaneously, please check the followingformula:P 0radP 0axM 1M 2M+ + + +3+ y ≤ 1 C 0radC 0axM xM yM zS 0P 0radC 0radP 0axC 0ax= effective radial load (N)= permissible radial load (N)= effective axial load (N)= permissible axial load (N)M 1, M 2, M 3= external moments ( Nm)M x, M y, M z= maximum permissible momentsin the different loading directions (Nm)y = reduction due to preloadFig. 75The safety factor S 0can lie on the lower given limit if the occurring forcescan be determined with sufficient precision. If shock and vibration arepresent, the higher value should be selected. For dynamic applicationshigher safety is required. Please contact the Application Engineering Department.52 www.rollon.com