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

Coupling with standard spacer

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

GERWAH® GERWAH® XHD

metric inch
CAD Size d1min d1max A L1 L2 TL nmax ΔKa ΔKw ΔKr
    mm mm mm mm mm Nm 1/min mm Grad mm
  17 15 37 70,5 139,0 40,0 8 8400 1,1 2 0,8
  32 24 42 88,0 160,0 45,0 14 6800 1,2 2 1,0
  75 28 60 116,0 210,0 55,0 31 5400 1,6 2 1,4
  135 36 75 140,5 220,0 60,0 63 4600 2,1 2 1,5
  240 50 90 166,5 250,0 75,0 110 3800 2,5 2 1,4
  400 50 100 198,5 320,0 90,0 180 3400 2,8 2 2,0
  650 60 115 238,0 390,0 125,0 280 3000 3,4 2 2,0
  1100 60 125 238,0 392,4 125,0 320 3000 1,2 1,4 1,6
  2100 80 155 295,0 520,0 160,0 570 2500 2,2 1 1,4
  3600 95 200 345,0 624,0 200,0 1000 2100 2,5 1 1,6
CAD Size d1min d1max A L1 L2 TL nmax ΔKa ΔKw ΔKr
  inch inch inch inch inch ft-lbs rpm inch degree inch
  17 0.60 1.44 2.78 5.47 1.56 6 8400 0.04 2 0.03
  32 0.94 1.65 3.46 6.30 1.77 10 6800 0.05 2 0.04
  75 1.10 2.36 4.59 8.27 2.17 23 5400 0.06 2 0.06
  135 1.41 2.76 5.53 8.66 2.36 46 4600 0.08 2 0.06
  240 1.97 3.54 6.56 9.84 2.95 81 3800 0.10 2 0.06
  400 1.97 3.74 7.81 12.60 3.54 133 3400 0.11 2 0.08
  650 2.36 4.92 9.37 15.35 4.92 207 3000 0.13 2 0.08
  1100 2.36 4.92 9.37 15.45 4.92 236 3000 0.05 1.4 0.06
  2100 3.15 6.10 11.61 20.47 6.30 421 2500 0.09 1 0.06
  3600 3.74 7.48 13.58 24.57 7.87 739 2100 0.10 1 0.06

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® XHD

    • Coupling with standard spacer

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