

Reliable Lubrication System
Engineered for simplicity, the integrated lubrication system eliminates the need for external piping, enhancing reliability and reducing maintenance efforts
Purpose-Built Housing Design
Engineered for simplicity, the integrated lubrication system eliminates the need for external piping, enhancing reliability and reducing maintenance efforts
Extended Bearing Span
Featuring heavy-duty roller bearings, the gearbox provides strong shaft support, making it ideal for high-torque applications.
More about Hansen M4 ACC
Hansen M4 ACC is purpose-designed for air-cooled condenser fan drives. Its monoblock housing incorporates a motor mounting lantern and an internal lubrication system, simplifying installation.
• Nominal output torque: 15–70 kNm across seven sizes.
• Reduction ratios: 7.1:1–25:1, with special ratios available on request.
• Input speeds up to 1,800 rpm.
• Top-mounted motor connection without separate motor-to-gearbox alignment.
• Pump lubrication with no external oil piping.
• Drywell sealing arrangement at the low-speed shaft.
• Lubrication designed to remain effective during windmilling, when airflow turns the fan.
• Gearbox selection takes fan starting and stopping conditions into account.
More about Hansen M5CT
Hansen M5CT is a two-stage, right-angle gearbox developed for fan drives in wet cooling towers, air-cooled condensers and direct-air-capture installations.
• Nominal output torque: 13–53 kNm across seven sizes.
• Reduction ratios: 6.3:1–22.4:1, depending on gearbox size.
• Input speeds up to 1,800 rpm.
• Rigid housing designed to transfer high fan loads to the mounting feet.
• Extended bearing spacing and heavy-duty roller bearings for strong shaft support.
• Materials and protective finishes suited to humid, corrosive environments.
• Standard splash lubrication, with optional pump lubrication and no external oil piping.
• Options include temperature and vibration monitoring provisions, cooling equipment and adapter plates for replacement installations.

Hansen M5CT — Technical Specifications
| Number of sizes | 7 |
|---|---|
| Housing | Dedicated, rigid housing |
| Gearing | Helical and bevel gears, designed and rated in accordance with AGMA |
| Reduction ratios | 6.3:1–22.4:1; special ratios on request |
| Nominal output torque | 13–53 kNm |
| Input speed | Up to 1,800 rpm |
| Shaft configuration | On request |
| Lubrication | Standard splash lubrication; optional pump lubrication, both without external piping |
Hansen M4 ACC — Technical Specifications
| Number of sizes | 7 |
|---|---|
| Housing | Monoblock housing with lantern housing |
| Gearing | Helical gears (designed and rated in accordance with AGMA) |
| Reduction ratios | 7.1:1 to 25:1 and special ratio's upon request |
| Nominal output torque | from 15 to 70 kNm |
| Input speed | Up to 1,800 rpm |
| Shaft configuration | On request |
| Lubrication | Pump with integrated lubrication (no outside piping) |