1) The maximum speed for the respective type must be noted. Refer to the operating instructions for additional information on allowable shaft misalignment. 2) The angular misalignment ΔK refers to themaximumadditional tilting of the shaft axes. w For coupling fatigue torque: T = 0,15 • T , where T >T must be adhered to. KW KN N W Torsional stiffness and damping (single-joint or two-joint coupling) The values stated in the above table apply to a capacity utilization of 50 %, an excitation amplitude of 10 % TKN with the frequency 10 Hz and an ambient temperature of 20 °C. The dynamic torsional stiffness is load-dependent and increases in proportion to capacity utilization. The following table shows the correction factors for different rated loads. C = C • FKC Tdyn Tdyn 50% Load T / T N KN 20% 40% 50% 60% 70% 80% 100% Correction factor 0.50 0.82 1.00 1.20 1.40 1.63 2.10 FKC 65/80/90 ShoreA The damping coefficient is Ψ = 1.4 Torsional stiffness and damping is further dependent on the ambient temperature and the frequency and amplitude of the torsional vibration excitation. More precise torsional stiffness and damping parameters on request. With flexible couplings the manufacturing process of the rubber elements and their aging primarily influence the stiffness value CTdyn. For this reason 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. Permitted shaft misalignment The permitted shaft misalignment depends on the operating speed. As the speed increases, lower shaft misalignment values are permitted. The correction factors for different speeds are specified in the following table. Themaximum speed for the respective coupling sizemust be noted! ΔK =ΔK • FKV perm 1500 Speed in rpm 500 1000 1500 3000 Correction factor FKV 1.7 1.2 1.0 0.7 For fitting, themaximumgap dimension of Smax. = S + S and theminimumgap dimension of Smin. = S – S are permitted. Δ Δ Shaft misalignments K and K may occur simultaneously. r w Δ Δ 1) Rated Maximum Torsional stiffness at 50% capacity Permitted shaft misalignment at speed n = 1500 rpm torque torque utilization for flexible type 2) 90 ShoreA 90 ShoreA 90 ShoreA S = 100 mm S = 140 mm S = 180 mm S = 200 mm S = 250 mm Angle T T C 50% ΔK ΔK ΔK ΔK ΔK ΔK KN KN Tdyn r100 r140 r180 r200 r250 w (Nm) (Nm) (kNm/rad) (mm) (mm) (mm) (mm) (mm) (°) Size Performance data of the N-Eupex DK series (two joint coupling) 68 48 120 1.18 1.2 – – – – 0.20 80 85 212 2.95 1.2 1.7 – – – 0.20 95 140 350 4.84 1.1 1.6 – – – 0.20 110 225 562 7.44 1.0 1.5 2.1 – – 0.20 125 345 862 11.2 1.0 1.5 2.0 2.3 – 0.10 140 500 1250 16.1 0.9 1.4 1.8 2.1 2.7 0.10 160 840 2100 35.4 – 1.3 1.8 2.1 2.7 0.10 180 1250 3125 57.6 – 1.3 1.8 2.0 2.6 0.10 200 1950 4875 93.5 – 1.2 1.7 2.0 2.6 0.10 225 2300 5750 118 – – 1.7 1.9 2.6 0.10 www.jbj.co.uk/couplings.html#flender 7 #DriveLineHarmony N-Eupex & N-Eupex DS Technical Specifications Torsionally Flexible Couplings
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