www.jbj.co.uk/couplings.html#flender N-Bipex Series General Information Torsionally Flexible Jaw Couplings 3 #DriveLineHarmony Size Undrilled Preferred bores part 1/2 from stock with cylindrical finished bores Ø in mm H7, parallel keyway according to DIN 6885-1 JS9 and set screw. 10 11 12 14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 40 42 45 48 50 55 60 65 70 75 80 85 90 100 110 120 19 24 28 38 42 48 55 65 75 90 Preferred bores G_MD10_XX_00235 G_MD10_XX_00240 G_MD10_XX_00241 Type BWN Type BWT Type BNT Load T / T N KN The values stated in the above table apply to a capacity utilization of 50%, an excitation amplitude of 10% T with frequency 10 Hz and an ambient KN temperature of 20°C. The dynamic torsional stiffness (C ) is load-dependent and increases in proportion to capacity utilization. The following table shows the correction factors Tdyn for different nominal load. Furthermore, torsional stiffness and damping depend on the ambient temperature, the frequency and the amplitude of the torsional vibration excitation. More precise torsional stiffness and damping parameters on request. Torsional Stiffness and Damping Correction factor FKC 92/95 ShoreAand 64 Shore D 0.56 0.85 1 1.17 1.35 1.53 1.92 C = C 50% • FKC Tdyn Tdyn 20% 40% 50% 60% 70% 80% 100% With flexible couplings the manufacturing process of the rubber elements and their aging primarily influence the stiffness value C . For this reason Tdyn calculation must be made with a tolerance for the dynamic stiffness of ±20 %. The specified damping coefficient Ψ is a minimum value with the result that the damping performance of the coupling corresponds at least to the specified value.
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