{"product_id":"qbp403819","title":"Raymarine Type 2 Rotary Autopilot Drive, For Chain and Sprocket Steering, 44,000 lb Max Displacement, 34 Nm Peak Torque","description":"\u003ch6\u003eOverview\u003c\/h6\u003e\u003cp\u003eThe Raymarine Type 2 Rotary Autopilot Drive is an electric rotary drive for Raymarine autopilot systems on powerboats and sailboats with steering that can be driven from the helm through a chain and sprocket. It is built for vessels up to 20,000 kg (44,000 lb) displacement and is offered for either 12V DC or 24V DC power systems.\u003c\/p\u003e\u003cp\u003eThis drive suits cable and rod steering systems where a mechanical chain drive can be added between the drive unit and the boat’s steering shaft. Type 2 performance is rated at 34 Nm (300 lb.in) peak output torque, with a maximum shaft speed of 33 rpm and a recommended hardover-to-hardover time of 10 seconds with no load.\u003c\/p\u003e\u003cp\u003eInside the unit, an electric motor drives a precision epicyclic gearbox through a high tensile drive belt, while an electromagnetic clutch transfers steering loads without slipping. For larger wheel-steered boats that need autopilot control without converting to hydraulic steering, this is the rotary drive style to consider.\u003c\/p\u003e\u003ch6\u003eKey features\u003c\/h6\u003e\u003cul\u003e\n\u003cli\u003eType 2 rotary autopilot drive for chain-and-sprocket steering systems, including many cable and rod steering installations.\u003c\/li\u003e\n\u003cli\u003eRated for boats up to 20,000 kg (44,000 lb) displacement when matched with the correct autopilot system and steering layout.\u003c\/li\u003e\n\u003cli\u003eAvailable in 12V DC and 24V DC versions to match the vessel’s electrical system.\u003c\/li\u003e\n\u003cli\u003eWorks with Raymarine ACU-400 autopilot control units.\u003c\/li\u003e\n\u003cli\u003e34 Nm (300 lb.in) peak output torque gives the drive the force needed for heavier steering loads in the Type 2 class.\u003c\/li\u003e\n\u003cli\u003eMaximum shaft speed is 33 rpm, with a recommended 10 second hardover-to-hardover time under no load.\u003c\/li\u003e\n\u003cli\u003eTypical average power consumption is 60-84 W on the 12V model and 72-120 W on the 24V model.\u003c\/li\u003e\n\u003cli\u003eOptional drive sprockets and steering-chain changes may be needed, depending on the vessel’s steering geometry.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eVariants\u003c\/h6\u003e\u003cp\u003eThis product is offered in two voltage configurations so the drive can be matched to the boat’s DC power system.\u003c\/p\u003e\u003cp\u003eThe steering application, Type 2 rating, displacement rating, peak torque, shaft speed, and ACU-400 compatibility are consistent across the two versions. The voltage and typical average power consumption change between variants.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eM81136: Voltage 12V. This version is for boats with a 12V DC autopilot drive circuit and has a typical average power consumption of 60-84 W.\u003c\/li\u003e\n\u003cli\u003eM81137: Voltage 24V. This version is for boats with a 24V DC autopilot drive circuit and has a typical average power consumption of 72-120 W.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch6\u003eCompatibility and fit\u003c\/h6\u003e\u003cp\u003eThe drive is intended for steering systems that can be operated from the helm through a chain and sprocket. Before installation, confirm that the vessel’s steering shaft can accept the required sprocket arrangement and that the steering system can be moved freely through its full travel without binding.\u003c\/p\u003e\u003cp\u003eThis is not a drop-in replacement for every steering system. The correct sprocket sizes, chain path, mounting position, and course computer or ACU match should be checked as part of the autopilot installation plan.\u003c\/p\u003e\u003ch6\u003eInstallation and setup\u003c\/h6\u003e\u003cp\u003eThe unit must be mounted where it can be secured firmly, aligned correctly with the steering sprocket, and reached later for inspection or service. The mounting arrangement uses slots that accept 12 mm bolts, and the chain run should be set up so it transfers load cleanly without side loading the drive shaft.\u003c\/p\u003e\u003cp\u003eElectrical connections should be made with the power supply switched off and with cable sizing suitable for the total cable run to the autopilot course computer or ACU. On boats with longer cable runs or higher steering loads, correct wiring and overcurrent protection are especially important for consistent autopilot performance.\u003c\/p\u003e\u003ch6\u003eUse cases on board\u003c\/h6\u003e\u003cp\u003eThis drive is a practical match for larger sailboats and powerboats with mechanical steering that need autopilot control for coastal passages, offshore runs, fishing days, or long hours under power. It is most relevant where the boat already has, or can be adapted to, a chain-and-sprocket steering drive arrangement.\u003c\/p\u003e","brand":"Raymarine","offers":[{"title":"12V","offer_id":52581979881653,"sku":"QBP403819-V1","price":2699.99,"currency_code":"USD","in_stock":true},{"title":"24V","offer_id":52581979914421,"sku":"QBP403819-V2","price":0.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0977\/8171\/1029\/files\/1335134_qbp403819.webp?v=1780202001","url":"https:\/\/www.qualityboatparts.com\/products\/qbp403819","provider":"Quality Boat Parts","version":"1.0","type":"link"}