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GERWAH® Torsionally Rigid Disc Couplings with RINGFEDER® keyless shrink disc hub design, Series XHS

Coupling without spacer

Multiple-disc coupling for compensating of axial, angular and radial misalignments

GERWAH® GERWAH® XHS

metric inch
CAD Size d1min d1max A L1 L2 TL nmax ΔKa ΔKw
    mm mm mm mm mm Nm 1/min mm Grad
  17 15 37 70,5 86,6 40,0 8 8400 0,5 1,0
  32 24 42 88,0 98,8 45,0 14 6800 0,5 1,0
  75 28 60 116,0 120,4 55,0 31 5400 0,8 1,0
  135 36 75 140,5 132,0 60,0 63 4600 1,0 1,0
  240 50 90 166,5 163,0 75,0 110 3800 1,2 1,0
  400 50 100 198,5 195,0 90,0 180 3400 1,4 1,0
  650 60 115 238,0 271,0 125,0 280 3000 1,7 1,0
  1100 60 125 238,0 272,2 125,0 320 3000 1,2 0,7
  2100 80 155 295,0 348,0 160,0 570 2500 1,1 0,5
  3600 95 200 345,0 432,0 200,0 1000 2100 1,3 0,5
CAD Size d1min d1max A L1 L2 TL nmax ΔKa ΔKw
  inch inch inch inch inch ft-lbs rpm inch degree
  17 0.600 1.440 2.780 3.410 1.560 6 8400 0.020 1.0
  32 0.940 1.650 3.460 3.890 1.770 10 6800 0.020 1.0
  75 1.100 2.360 4.590 4.740 2.170 23 5400 0.030 1.0
  135 1.410 2.760 5.530 5.200 2.360 46 4600 0.040 1.0
  240 1.970 3.540 6.560 6.420 2.950 81 3800 0.047 1.0
  400 1.970 3.740 7.810 7.680 3.540 133 3400 0.055 1.0
  650 2.360 4.920 9.370 10.660 4.920 207 3000 0.067 1.0
  1100 2.360 4.920 9.370 10.720 4.920 236 3000 0.047 0.7
  2100 3.150 6.100 11.610 13.700 6.300 421 2500 0.040 0.5
  3600 3.740 7.480 13.580 17.020 7.870 739 2100 0.050 0.5

GERWAH® XHS, XHD and XHC: The advantages of the system

1. No tooth backlash

  • An important property for synchronous operation or for machines that are frequently used in start/stop or reverse operation. GERWAH® couplings are ideally suited to applications in which the positioning accuracy of the control system in both directions is important.
  • 2. Torsional stiffness

  • The design of the coupling guarantees a high level of torsional stiffness, which is an important property for applications in packaging machines, servomotors drives, printing presses and machine tools.
  • 3. High temperatures

  • GERWAH® couplings can be used under extreme temperature conditions up to 240 °C/460 °F, e.g. in high-temperature fluid pumps.
  • 4. High speeds

  • Due to the very strict production tolerances, GERWAH® allows precise vertical alignment and a high level of true running accuracy, making it ideal for applications involving high speeds even with irregular rotary forces.
  • 5. High service life

  • The highly accurate disc pack insures optimum force distribution, while its flexibility also protects against vibrations from the drive. GERWAH® couplings do not wear, so that a long service life is guaranteed
  • 6. Maintenance-free operation

  • GERWAH® couplings are maintenance-free and do not require greasing or cleaning
  • Characteristics
    Mounting with RINGFEDER® Shrink Disc
    GERWAH® - XHS, XHD, XHC

    Multiple-disc coupling for compensating of axial, angular and radial misalignments

    • Permanently backlash-free attachment of the multipledisc coupling by means of RINGFEDER Shrink Disc
    • Overall length adaptable to customer requirements by the use of various center spacers (XHD, XHC)
    • High torsional stiffness
    • Backlash-free transmission of high torques
    • Can be used up to temperatures of approx. 240 °C/460 °F
    • Maintenance-free operation

    Non-standard spacers
    Many applications for GERWAH® couplings require special spacer lengths and dimensions. We can supply spacers with lengths of up to 5m.

    Higher rotational speeds and/or special couplings
    A coupling sometimes needs to fulfil certain industrial safety standards or is operated at very high rotational speeds. We can also provide solutions for this.

    GERWAH® XHS

    • Coupling without spacer

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