MECHANICAL GEARBOX TYPE GEAR RATIO ADVANTAGE AT MIDSHIPS TURNS HO TO HO MAXIMUM RUDDER TORQUE TYPICAL BOAT RANGE Nm ft.lbs m ft BG12 5:1 8:1 1.8 2943 2170 up to 14 up to 45 BG12/2 5:1 8:1 1.8 2943 2170 up to 14 up to 45 BG30 6.7:1 10.2:1 2.4 4905 3617 14-18 45'-60' 9. Steering 372/373 Mamba™ – Bevelheads Mamba™ – BG Reduction Gearboxes BH10 Lewmar BH10 torque tubes are made of marine grade stainless steel depending on the specific installation requirements. Torque tubes are supplied in standard lengths with one end loose for welding by the installer. Or we offer fully welded torque tubes to pre-specified lengths. Universal Joints Must be fitted at both ends of a torque tube. Where a self aligning bearing is used, one universal joint connects both torque tubes, as shown in illustrations. Self aligning bearings work up to an angle of 15°. AMK10 universal joints have a maximum permissible working angle of 25°. Where practical, the angle at each joint should be balanced. The WUJ6 universal joint is suitable for use with large gearboxes 18, 20 and 45, see p191. It has a maximum permissible working angle of 25°. Where practical, the angle at each joint should be balanced. Mamba Universal Joint and self aligning bearing Additional information 1 Steering shafts can be made to customer’s preferred length 2 Bevelheads are available with either rotation 3 Standard bevelheads have 1:1 ratio, but other ratios are available as detailed in specification 4 Mounting plate (or bracket) can be fitted to all faces to facilitate ease of mounting 5 All bevelheads can be configured to accept the Lewmar direct fit autopilot mount 6 For detailed dimensions contact a Lewmar representative 7 Due to the custom nature of this product, contact Lewmar for part number BH130 – For boats 60ft and above Lewmar BH130 torque tubes are made of marine grade stainless steel. Depending on the specific installation requirements, torque tubes are supplied in standard lengths with one end loose for welding by the installer. Or we offer fully welded torque tubes to pre-specified lengths. The BG Series of high efficiency reduction gearboxes employ bevel gears manufactured from either high alloy steel or nickel bronze alloy running in precision roller bearings. Gear casings are manufactured from marine grade aluminium and shaft work is stainless steel or nickel bronze alloy. All gearboxes are grease filled and shimmed for zero backlash. Additional information 1 Mechanical advantage and turns lock to lock are based on standard lever geometry 2 Reduction gearboxes can be mounted anywhere within the general proximity of the rudder stock 0.2m/7" to 2m/6.5' 3 For detailed dimensions contact your Lewmar representative 89200034 Gearbox (BG12)
RkJQdWJsaXNoZXIy MjM2MTk=