Description
Technodrive hydraulic reverse gear TM93A R=2.40:1 with 8° output shaft
The Technodrive TM93A is a hydraulically operated reverse gear for inboard drives in marine installations. This version has a reduction ratio of 2.40:1 in both forward and reverse and is equipped with an output shaft at an angle of 8°. The reverse gear is used to transfer engine power to the propeller shaft in a controlled way and enables shifting between forward, neutral and reverse.
Thanks to its hydraulic operation, the TM93A is designed for smooth shifting and reliable operation under load. The 8° angle of the output shaft makes this version suitable for installations where the engine and propeller shaft layout requires it. This 2.40:1 reduction variant is intended for marine drive systems where both the correct transmission ratio and a suitable shaft angle are important. Always check that the reduction ratio, maximum permitted torques, shaft angle, installation dimensions and connections match the existing driveline and engine installation.
Application
This Technodrive reverse gear is used in inboard drive systems where the engine drives the propeller shaft via a reverse gear. The transmission provides the correct reduction of engine speed and makes it possible to change the rotation direction of the propeller shaft. The 8° output shaft is especially important in marine installations where an angled driveline layout is required for correct alignment and reliable operation.
Main features
- Hydraulic operation: Ensures smooth shifting and reliable power transmission.
- Forward reduction 2.40:1: Suitable for installations where this gear ratio is required.
- Reverse reduction 2.40:1: Equal reduction in both sailing directions.
- Output shaft angle 8°: Suitable for installations where an angled driveline layout is required.
- Maximum input speed 4,500 rpm: For compatible engine installations within this speed limit.
- Oil capacity 2 litres: Supports lubrication and cooling of the internal components.
- Lubrication pressure 0.5-1.5 bar: For reliable lubrication of the reverse gear.
- Operating pressure 24 bar: Designed for hydraulic operation under load.
- Dry weight 51 kg: Robust design for marine drive systems.
Technical specifications
- Brand: Technodrive
- Type: TM93A
- Part number: TM93A240
- EAN number: 8719182621768
- Forward reduction: R=2.40:1
- Reverse reduction: R=2.40:1
- Maximum input speed: 4,500 rpm
- Dry weight: 51 kg
- Oil capacity: 2 litres
- Output shaft angle: 8°
- Lubrication pressure: 0.5-1.5 bar
- Operating pressure: 24 bar
- Maximum torque pleasure craft: 35 kgm
- Maximum torque commercial craft: 27 kgm
Why the correct reverse gear is important
A reverse gear is an essential component of the driveline. An incorrectly selected, worn or poorly fitting reverse gear can cause slipping, poor shifting, vibrations, heat build-up or damage to the engine, coupling and propeller shaft installation. With this TM93A version, the 8° shaft angle is also an important selection point. It is therefore important to carefully check the specifications of the existing installation before replacing the reverse gear.
Documentation
For installation, maintenance, service data and technical inspection, a service manual is available for the Technodrive TM93 and TM93A reverse gears.
Scope of delivery
The delivery consists of one Technodrive hydraulic reverse gear TM93A with reduction ratio 2.40:1 and an output shaft angle of 8°. Before installation, always check the technical drawing, connection dimensions, shaft angle, rotation direction and specifications of the existing installation.





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