FLENDER Standard Couplings Torsionally Rigid All-Steel Couplings — ARPEX ARC-8/-10 Series © Siemens AG 2015 General information ■ Technical data Power ratings 6 The permitted shaft misalignments Δ K a , Δ K r and Δ K w are maxi- mum values and must not occur at the same time (see following table). The specified, permitted shaft misalignment Δ K r for types NEN/NHN and MFEFM/MFHFM applies to a shaft distance of S = 1000 mm (ARC-8) or S = 1500 mm (ARC-10). The permitted shaft misalignment Δ K r for types NEN and NHN is calculated as follows: Δ K r = (S – S1) ⋅ tan( Δ K w ). The permitted shaft misalignment Δ K r for types MFEFM and MFHFM is calculated as follows:
Δ K r = (S – S1 – 2 ⋅ BF) ⋅ tan( Δ K w ). The values for torsional stiffness apply to the complete coupling. In the case of types NHN and MFHFM to a coupling with shaft distance S = 1000 mm (ARC-8) or S = 1500 mm (ARC-10). The torsional stiffness of the plate packs applies to the rated cou- pling torque T KN . To determine the torsional stiffness for a spe- cific operating point, e.g. for calculating torsional vibration, the manufacturer must be consulted. T Kmax permitted only five times per hour.
Permitted shaft misalignments 6/29 Siemens MD 10.1 · 2015 Size Rated torque Maxi- mum torque Over- load torque Fatigue torque Maxi- mum speed Maximum permitted shaft misalignment Torsional stiffness ±ΔKa ±ΔKw ±ΔKr CT TKN TKmax TKOL TKW nKmax NEN NHN BUB MFEFM MFHFM NEN for NHN BUB MFEFM for MFHFM S = 1000 mm S = 1000 mm S min. S = 1000 mm S min.
S = 1000 mm kNm kNm kNm kNm rpm mm mm mm mm MNm/rad MNm/rad MNm/rad MNm/rad MNm/rad 225-8 8.5 17 25.5 4.25 8500 1.94 0.4° 6.87 0.96 6.53 3.1 0.9368 3.0 3.1 0.9748 12.7 25.4 38.1 6.35 7500 2.32 6.86 1.10 6.51 3.8 1.2778 3.7 3.8 1.3295 16.5 33 49.5 8.25 7000 2.40 6.88 1.10 6.52 5.4 1.7339 5.1 5.4 1.8072 23 46 69 11.5 6500 2.62 6.86 1.17 6.44 7.1 2.6134 6.7 7.1 2.7358 33 66 99 16.5 6000 2.60 6.84 1.38 6.34 9.6 3.9537 9.4 9.6 4.1715 45 90 135 22.5 5500 2.88 6.83 1.42 6.28 12.8 5.6093 12.5 12.8 5.9339 56 112 168 28 5000 3.12 6.81 1.63 6.22 17.8 7.8517 17.0 17.8 8.3555 70 140 210 35 4500 3.46 6.79 1.78 6.14 22.9 10.8175 21.9 22.9 11.5763 88 176 264 44 4200 4.02 6.78 1.89 6.11 30.0 14.2794 28.2 30.0 15.2998 120 240 360 60 3800 4.28 6.77 2.41 6.04 40.2 20.9046 36.4 40.2 22.4421 165 330 495 82.5 3500 4.48 6.75 2.67 5.98 50.4 28.7428 45.0 50.4 30.7848 210 420 630 105 3200 4.86 6.73 2.88 5.89 67.8 39.5343 59.5 67.8 42.5997 255-8 270-8 295-8 325-8 355-8 385-8 420-8 455-8 505-8 545-8 595-8 630-8 260 520 780 130 3000 4.98 0.3° 4.93 2.10 4.14 61.8 42.6162 61.2 61.8 46.3697 340 680 1020 170 2700 5.78 4.91 2.38 4.06 84.9 60.2135 83.1 84.9 65.8083 700-8 S = 1500 mm S = 1500 mm S = 1500 mm S = 1500 mm 630-10 340 680 1020 170 3000 3.04 0.2° 5.03 1.40 4.50 94.6 46.9832 94.4 94.6 50.5520 430 860 1290 215 2700 3.60 5.02 1.58 4.45 135 72.3106 132 135 77.9729 550 1100 1650 275 2500 3.70 4.98 1.60 4.30 173 91.7589 180 173 101.228 770 1540 2310 385 2200 4.82 4.95 1.86 4.21 244 145.230 245 244 160.422 1050 2100 3150 525 2000 5.40 4.91 1.92 4.09 325 204.443 338 325 227.957 1450 2900 4350 725 1850 5.78 4.88 1.95 3.97 426 292.140 455 426 326.930 700-10 760-10 860-10 950-10 1035-10 Size Permitted angular misalignment ±ΔKw 0.0° 0.1° 0.2° 0.3° 0.4° Permitted axial misalignment ±ΔKa in mm 225-8 1.94 1.46 0.97 0.48 0.00 255-8 2.32 1.74 1.16 0.58 0.00 270-8 2.40 1.80 1.20 0.60 0.00 295-8 2.62 1.96 1.31 0.66 0.00 325-8 2.60 1.95 1.30 0.65 0.00 355-8 2.88 2.16 1.44 0.72 0.00 385-8 3.12 2.34 1.56 0.78 0.00 420-8 3.46 2.59 1.73 0.86 0.00 455-8 4.02 3.01 2.01 1.00 0.00 505-8 4.28 3.21 2.14 1.07 0.00 545-8 4.48 3.36 2.24 1.12 0.00 595-8 4.86 3.65 2.43 1.22 0.00 630-8 4.98 3.32 1.66 0.00 700-8 5.78 3.85 1.93 0.00 630-10 3.04 1.52 0.00 700-10 3.60 1.80 0.00 760-10 3.70 1.85 0.00 860-10 4.82 2.41 0.00 950-10 5.40 2.70 0.00 1035-10 5.78 2.89 0.00