Parameter Helical Gearboxes (H / HA) Helical-Bevel Gearboxes (B / BA) Parallel-Shaft Helical Gearboxes (S) Planetary Gearboxes (HPL)
Application Type Standard industrial applications Applications requiring a change in drive direction Drive systems mounted directly on the machine shaft The most demanding heavy-duty applications
Configuration Coaxial Right-angle (90°) Parallel-shaft Coaxial/right-angle
Torque up to 8,000 Nm up to 13,000 Nm up to 3,200 Nm up to 100,000 Nm
Gear Ratio Range up to 354 up to 443 up to 394.69 up to 3,190
Number of Reduction Stages 1–3 2–3 2–3 1–4
Output Shaft Diameter up to 90 mm up to 110 mm up to 60 mm up to 120 mm
Dimensions Standard More compact when changing the drive direction Compact Most compact relative to power output
Efficiency Very high High High High, even under very heavy loads
Load Capacity Good – designed for constant shaft loads Very good Good – designed for constant shaft loads Highest – suitable for shock loads and harsh operating conditions
Typical Applications Conveyors, production machinery Material handling systems, production lines with limited space Mixers Crushers, mixers, heavy industry
Material Cast iron / aluminium Cast iron / aluminium Cast iron Ductile iron with hardened gearing
Main Advantage Simplicity and reliability Installation flexibility No coupling required – the gearbox is mounted directly on the shaft Maximum power in a compact design
When Should You Choose It? When you have a standard application with a stable load When you need to change the drive direction and have limited installation space When driving a long shaft and you want to avoid using an inline coupling When you require high torque and cannot afford equipment failures