HKD / HKDI 5… | Double joint coupling

Accessories – mechanical

  • For encoder attachments with offset    
  • Play-free, torsion resistant and failsafe
  • Extends service life of encoders
  • Options: Isolated version (HKDI 5)
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The stable connections

Corrosion proof HKD metal multiple disc couplings compensate a parallel misalignment up to ±0.5 mm and an axial misalignment up to ±1 mm as well as extending the service life of encoders in the process. Double joint couplings are available with different hub lengths and bore diameters in addition to isolated coupling versions for attachments where the risk of shaft currents is a concern.

Technical Data

AttributeValue
Product usage
  • Compensate axial misalignment
  • Compensate parallel misalignment                               
  • Isolate against existing bearing/shaft currents
Coupling specification
  • HKD 5…: Stainless steel coupling
  • HKDI 5…: Stainless steel coupling with plastic screws (electrically isolated)
Bore drive side

Max. Ø 22 mm with keyway or clamp

Bore encoder side

Max. Ø 22 mm with keyway or clamp

Outer diameter

Ø 54 mm

Total length

66 - 120 mm

Mounting accuracy

Radial misalignment: up to ±0.5 mm / axial misalignment: up to ±1 mm

Maximum rotation

4000 rpm

Temperature range
  • HKD 5…: -50 °C to +120 °C
  • HKDI 5…: -40 °C to +110 °C
Shock resistance

Briefly 50 g

Vibration resistance

Briefly 10 g

Insulated against currents
  • HKD 5…: No
  • HKDI 5…: Yes
Mechanical options
  • Isolation against bearing/shaft currents (type HKSI)
  • Attachment to larger shaft diameters possible with adapter shaft
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