
ZDY / ZLY / ZSYZDY/ZLY/ZSY/ZFY Helical and DBY/DCY/DFY Bevel-Helical Gear Units
Standard Helical & Bevel-Helical Gearbox DONLY ZDY / ZLY / ZSY

Classic hardened-gear Z/D range: helical ZDY, ZLY, ZSY, ZFY (1–4 stages) and bevel-helical DBY, DCY, DFY (2–4 stages), hollow-shaft versions DBYK, DCYK, DFYK. Centre distance 80–800 mm, ratios 1.25–500, nominal input power 1.1–6,666 kW. Gears carburized to HRC 57–61, ground with profile and helix modification, shot-peened roots; efficiency 98/96/94/92 % for 1–4 stages. Split cast housing, welded on request. n1 ≤ 1,500 rpm, pitch-line velocity ≤ 20 m/s, −40…+45 °C. Company standard Q/DT 62080-2017.
Specifications
- Series
- ZDY, ZLY, ZSY, ZFY (helical); DBY, DCY, DFY and DBYK/DCYK/DFYK (bevel-helical)
- Centre distance
- 80–800 mm
- Ratios
- 1.25–500 (ZDY 1.25–5.6; ZLY 6.3–20; ZSY 22.4–100; DBY 4–14; DCY 16–50; DFY 56–250)
- Nominal input power P1N
- 1.1–6,666 kW
- Stages
- 1–4
- Efficiency
- 98 / 96 / 94 / 92 % (1 / 2 / 3 / 4 stages)
- Gears
- carburized, HRC 57–61, ground, shot-peened
- Operating conditions
- n1 ≤ 1,500 rpm; −40…+45 °C; standard Q/DT 62080-2017
Applications
- Belt and apron conveyors
- Ball mills and crushers
- Winches and hoisting gears
- Rolling-mill equipment drives
- Mixers, drum dryers and fans
Industries
We will select the right size for your task and prepare a quotation under a direct SDS contract.







