# Bevel gearbox KA218-1000 kW — Mini Maritsa-Iztok, Troyanovo-3 mine

**IE A049**  
Mini Maritsa-Iztok, Troyanovo-3 mine · Bulgaria · 2004

Metal built up on the teeth, bearing clearance decreased, electric motor load dropped. Bevel gearbox KA218-1000 kW, Mini Maritsa-Iztok, Troyanovo-3 mine.

## Measured

- gear wheel tooth thickness, 12.50-19.00 → 12.70-19.20 mm — **0.20 mm**
- backlash of the drum bearing, 0.65 → 0.45 mm — **30.8 %**
- gearbox drive current at no load, 36 → 33 A — **8.3 %**

## Conclusion

Metal built up on the teeth, bearing clearance decreased, electric motor load dropped

Page: https://industry.xado.com/case/protokol_troianovo_3_konicheskii_reduktor_ka218_1000kw_1216__2
PDF report: https://industry.xado.com/pdf/TIER%20A/MaritsaIztok/Konicheskiy-gearboxes-KA218-1000/IE-A049_XADO_MaritsaIztok_Konicheskiy-gearboxes-KA218-1000_EN.pdf
Original scan: https://industry.xado.com/scans/protokol_troianovo_3_konicheskii_reduktor_ka218_1000kw_1216__2.pdf