Tsubaki Power Lock Inch Series

EL SeriesBASIC CHARACTERISTICSTsubaki: The solution for shaft locking devices1. Transmissible Torque, TransmissibleThrust and Contact PressureMt: Transmissible TorquePax: Transmissible LoadP、P': Contact PressureFo: Preload ForceFe: Actual Locking ForceF: Total Force2. Contact Pressure and TransmissibleTorque for Multiple POWER-LOCKInstallationThe EL Series POWER-LOCKs require preload force Fo toobtain a 0 clearance shaft-hub connection.The degree of tightness achieved by applying the actuallocking force Fe in addition to the preload force Fo, is directlyproportional to the Fe as indicated in the above diagram.Accordingly, we use the following formula to calculate thetotal force required to reach the desired degree of tightness.F=Fe+Fo2.Transmissible torque and contact pressure are generallydetermined by the following formulas.Mt = N × μ × d (μ: Friction Coefficient)2(1)Pax = N × μ = 2Mt/d (2)P = N /πd < (3)P'= N /πD< (4)FeN =tanβ+2(β: EL Power-Lock taper angle) (5)In the case of multiple EL POWER-LOCK installation thepressure applied on the rings will distribute as illustratedabove.The following table indicates transmissible torque ratiosfor specific numbers of unit(s) installed.A maximum of four EL POWER-LOCKs may be installed.Corner R ValuesIf you are not using a spacer sleeve, maintain thefollowing Corner R values.Note: Mt1, P1,P1' refer to single unit installationSpacer SleevesUse a spacer sleeve(as illustrated below)if indentations or largeCorner R values cannotbe avoided due to specificmachining requirements.67More information at www.ustsubaki.com