www.jbj.co.uk/couplings.html #DriveLineHarmony D D x K min ≥ K= σ : elastic load of hub material 0,2 X: varies depending on hub shape (A, B, C) P : pressure generated on the outer n ® SIT-LOCK diameter (see table) ® SIT-LOCK locking devices for applications with high bending moments ® Conveyor belt pulley installed using a SIT-LOCK locking device First of all, the maximum bending moment of the shaft used for transmission must be checked. The permissible deflection (fmax) must not exceed 1/2000 of ® the distance between bearings (s). Once the maximum bending moment has been checked, check which type of SIT-LOCK should be used. The tables show the permissible values for proper use. The values shown are calculated with oiled surfaces. Coefficient of friction taken as: 0.12 Minimum hub diameter Dmin The following diagram shows how to calculate the minimum hub diameter D . min ® To determine the minimum hub diameter D , multiply the coefficient K by the outer diameter D of the chosen SIT-LOCK locking device. min K depends on the elastic load of the hub material (indicate letter), the pressure generated on the hub (Pn) and X which varies according to the shape of the hub (A, B, C). Application A X=1 Application B X=0,8 Application C X=0,6 D Dmin ≥ H D Dmin ≥ 2H D ≥ 2H Dmin σ + (X • Pn) 0.2 σ - (X • Pn) 0.2 71
RkJQdWJsaXNoZXIy NzQyNjQ=