# Lift worm gearbox — Kharkov – Lift 4

**IE A055**  
Kharkov – Lift 4 · Ukraine · 2003

Worm pair backlash decreased, pitting and scoring disappeared, gearbox noise decreased. Lift worm gearbox, Kharkov – Lift 4. Ukraine · 2003.

## Measured

- worm backlash in mesh, 36° → 28° — **22.2 %**

## Conclusion

Worm pair backlash decreased, pitting and scoring disappeared, gearbox noise decreased

Page: https://industry.xado.com/case/akt_kharkov_lift_4_g
PDF report: https://industry.xado.com/pdf/TIER%20A/KharkivLift4/elevators-worm-gearboxes/IE-A055_XADO_KharkivLift4_elevators-worm-gearboxes_EN.pdf
Original scan: https://industry.xado.com/scans/akt_kharkov_lift_4_g.pdf