Autopilot hydraulic ram, T1, 12 V
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Technical specifications
Technical specifications
| Max power consumption | 228 W |
| Typical power consumption | 24 W |
| Operating voltage | 12 VDC |
| Operating temperature | -15 to +55 °C |
| Recommended fuse rating | 25 A |
| Ingress protection | IP67 |
| Wired network | Direct connection to autopilot computer |
| Mounting type | Below deck, with quick-release mounting foot |
| Certifications | BS EN 60945:2002 (EMC), BS EN 28846:1993 (Ignition protection) |
| Displacement | Up to 12,000 kg |
| Recommended Oil Type | Mineral hydraulic oil, ISO VG10 to VG40 |
| Piston Rod Material | Chrome stainless steel |
| Max thrust | 700 kg |
| Max torque | 1569 Nm |
| Drive unit type | Linear hydraulic cylinder |
| Hard-over time | 13 s |
| Strokes | 255 mm |
| Mounting hardware included | Yes (mounting foot, bolts, nuts, washers, tiller pin) |
| Tiller arm length | 190, 213, 245 mm |
| Max pressure | 62 bar |
| Boat displacement | 12000 kg |
| Integrated rudder angle sensor | No |
| Steering modes | Depends on the autopilot computer |
| Disengageable | Yes |
| Clutch Connector Type | DIN 43650 |
| Clutch power consumption | 12 |
| Compatible autopilot computers | B&G NAC-3 or earlier models such as the AC12 |
| Compliance | BS EN 60945, BS EN 28846 |
| Product dimensions | 101 x 728 |
| Intermittent Current At 650kg | 19.0 |
| Mounting options | Below deck |
| Packaged weight kg | 8.98 |
| Product weight | 9,28 |
| Product weight | 8 |
| Ram Type | T1 |
| Rudder Angle Max | 80 |
| Typical Current At 25 Duty | 2.0 |
| Typical Max Thrust | 700 |
| Wiring Polarity | Red wire for extension positive, black wire for retraction positive |
Detailed description
Detailed description
The B&G T1 12V hydraulic autopilot ram is a fully integrated linear drive unit designed for sailboats up to 12,000 kg displacement. This self-contained system combines a cylinder, pump, motor, clutch, and reservoir in a single, pre-filled, and sealed housing, eliminating the need for external hoses and tanks. It is specifically designed for use with B&G NAC-3 autopilot computers or earlier models such as the AC12.
Performance and technical specifications
Powered exclusively by 12V DC, the RAM-T1-12V jack delivers a maximum intermittent thrust of 700 kg. The stop-to-stop time for a full 255 mm stroke is 13 seconds (at a 5 kg load), making it a more deliberate choice than the T2 model (9 seconds), which is better suited for displacement boats. Typical current consumption is 2.0 A (at 60 kg, 25% duty cycle), reaching 19.0 A under an intermittent 650 kg load. The bit torque depends on the bit arm used: 120 kgm with a 190 mm arm, 140 kgm with a 213 mm arm, and 160 kgm with a 245 mm arm.
Design and installation
Designed for below-deck installation, the T1 hydraulic ram is protected against immersion with an IP67 rating. It weighs 8 kg. The design incorporates internal relief valves, rated at 62 bar (730 kg), to protect the system against impacts on the rudder. A quick-release clip (R-Clip) allows for emergency manual disengagement. Mounting is facilitated by a quick-release mounting bracket. The operating temperature range is -15 to +55 °C.
Compatibility and system
This actuator is optimized for mechanical steering systems that can be reverse-driven. The 12-watt solenoid clutch, controlled by the ECU, engages for autopilot mode and disengages for manual steering. The clutch connects via a DIN 43650 connector for 6-8 mm cable. The system uses a mineral hydraulic fluid of type ISO VG10 to VG40 (e.g., Fuchs Renolin B 15 HV1, Seastar HA5430). The product complies with EMC standard BS EN 60945:2002 and the flammability standard BS EN 28846:1993.
Expert opinion
Expert opinion
Pol CONIN
Digital Manager
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