Engineering

MOUNTING - SHAFT & HOUSING INTERFACES

Life - Load and Speed (rpm) Formulas To calculate the theoretical L10 life in hours while including application dynamic loading, application speeds(rpm) and defined catalog load capacities(C) use the following industry standard formula. C = dynamic rating in catalog P = application applied load S = application speed in RPM L₁₀ = theoretical bearing L₁₀ life in hours ABMA-Industry Radial Caacity Formula Dynamic load ratings in catalog (Cr) are derived using the following Industry standard ABMA listed formula. Where: Cr = basic radial dynamic load rating fcm = factor for material, geometry, tolerance, quality, and race finish Dw = ball diameter in inches z = number of balss per row i = number of rows of balls = nominal contact angle of the bearing in degrees.	“C” type radial loading with one floating bearing	“A” type "F" pair & floating “C” type mounting
	“A” type DB pair “C” type radial thrust floating	Back-to-back mounting
	“X” type & floating “C” type mounting reversing thrust load & radial loads	Face-to-face mounting

About