• Automatic and permanent nut lubrication system to guarantee efficient lubrication during lifting and descent.
  • Main nut made of bronze (no plastic) with high resistance to wear, for greater safety.
  • Steel high resistance rolled screws, to provide long life.
  • Specially manufactured motors fitted with overheating protection switch.
  • Automatic arm locking during lifting and automatic unlocking when the arm reaches the floor – self-locking conical design.

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