No, do not count a worm gearbox as a brake. Sliding friction between the worm and the wheel, especially at high ratios, can make it hard for a load on the output shaft to turn the motor backwards; this is called "self-locking". However, the behaviour depends on the ratio, the worm lead, oil condition, temperature and vibration. On a vibrating machine or with a worn gearbox, the load can slowly creep back.

Therefore:

  • where a load running back is dangerous, such as hoists, lifting platforms or inclined conveyors, a separate brake, backstop or mechanical lock is used,
  • low-ratio worm gearboxes are more likely to back-drive,
  • this holding tendency is not expected from helical types.

Brake motors are not included in the HEM 2026 catalogue; if you need one, mention it when ordering and a solution will be assessed together.