GEARX Logo Hollow Flank Worm Gear Sets(ZC-Worm Gear Sets)

GEARX brand hollow flank worm gear sets(ZC-worm gear sets) are machined with the unique gear tooth geometry, it is called hollow-flank profile(tooth form C). compared with the normal cylindrical worms and worm gears,  under the same size, the hollow flank worm gear sets(ZC-worm gear sets) are far superior to comparable gear sets, with this pairing of the gear teeth, the hollow flank worm gear set can ensures an extremely low specific gear flank pressure. As the hollow flank worm profile teeth are subject to only low specific tooth pressure and give a better lubrication oil film  between the tooth flanks, so the profile contact is much more favorable than in conventional gear teeth systems.

Hollow flank worm (ZC-worm) is also called ZH worm in Germany.


  • Metallurgical equipments
  • Elevator drives
  • Escalator drives
  • Cement mixers
  • Bitumen mixers
  • Fan drives
  • Coffee roasters
  • Drum-type filters
  • Paper finishing
  • Actuator and swivel drives
  • Roll adjustment gears
  • Crank drive
  • Swivel drives

Main Products:

  • Standard series of hollow flank worm gear sets.
    • Center distance(mm): PDF catalog: 63, 80, 100, 125, 140, 160, 180, 200, 225, 250, 280, 315, 355, 400, 450, 500, 560, 630;
      Transmission ratio I=5~75.
  • Custom made hollow flank worm gear sets can be offered according to the customer's drawings.

Product Feature:

  • High overload capability
  • High efficiencies
  • High ratios
  • Significantly longer lifetime
  • Lower wear
  • Low noise levels
hollow flank worm gear sets hollow flank worm gear sets
Hollow flank worm gear sets Hollow flank worm gear sets
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