SeaStar Solutions Catalog

77 ® APPLICATION GUIDE: SEASTAR POWER STEERING CYLINDERS The chart below is only a guide to selecting a steering system. A steering system maker cannot anticipate all the variables in boat-rudder design that affect steering loads. It is the final responsibility of the boat designer/builder to specify maximum expected steering loads. If the required information is not available, contact customer service with rudder dimensions, vessel size and anticipated maximum speed. Boats over 70 feet should have steering loads reviewed by SeaStar Solutions. STEERING RECOMMENDED FOR WHEEL REQUIRES TUBING/HOSE MAXIMUM VESSEL HELM TURNS CYLINDER DIAMETERS OUTPUT TORQUE SIZES PUMP Lock to PART NUMBER(S) Power Manual UP TO: MODEL Lock (stroke, bore ”) Circuit Circuit In.-Lb. Nm PLANING HULLS: up to 65' (20m) SeaStar 1.7 3.5 HC5801-2 (9” 1.0”) 100R1 5/16” 18,900 2,130 up to 75' (23m) SeaStar 1.7 4.25 HC5803-2 (11” 1.0”) 100R1 5/16” 23,140 2,610 up to 85' (26m) SeaStar 1.7 3.5 HC5801-2 + HC5802 (9” 2.0”) 100R1 5/16” 37,800 4,260 up to 100' (31m) SeaStar 1.7 4.25 HC5803-2 + HC5804 (11” 2.0”) 100R1 5/16” 46,280 5,220 up to 110' (34m) SeaStar 1.7 3.5 HC5805 (9” 2.5”) 100R1 5/16” 33,065 3,736 up to 120' (37m) SeaStar 1.7 3.5 HC5805 + HC5806 (9” 2.5”) 100R1 5/16” 66,130 7,472 DISPLACEMENT HULLS (STANDARD): up to 50' (15m) SeaStar 1.7 3.5 HC5801-2 (9” 1.0”) 100R1 5/16” 18,900 210 up to 60' (18m) SeaStar 1.7 4.25 HC5803-2 (11” 1.0”) 100R1 5/16” 23,140 260 up to 75' (22m) SeaStar 1.7 3.5 HC5801-2 + HC5802 (9” 2.0”) 100R1 5/16” 37,800 420 up to 85' (26m) SeaStar 1.7 4.25 HC5803-2 + HC5804 (11” 2.0”) 100R1 5/16” 46,280 520 up to 100' (31m) SeaStar 1.7 3.5 HC5805 (9” 2.5”) 100R1 5/16” 33,065 3,736 up to 110' (34m) SeaStar 1.7 3.5 HC5805 + HC5806 (9” 2.5”) 100R1 5/16” 66,130 7,472 DISPLACEMENT HULLS (HEAVY DUTY): up to 40' (12m) SeaStar 1.7 3.5 HC5801-2 (9” 1.0”) 100R1 5/16” 18,900 210 up to 50' (15m) SeaStar 1.7 4.25 HC5803-2 (11” 1.0”) 100R1 5/16” 23,140 260 up to 55' (17m) SeaStar 1.7 3.5 HC5801-2 + HC5802 (9” 2.0”) 100R1 5/16” 37,800 420 up to 60' (18m) SeaStar 1.7 4.25 HC5803-2 + HC5804 (11” 2.0”) 100R1 5/16” 46,280 520 up to 70' (22m) SeaStar 1.7 3.5 HC5805 (9” 2.5”) 100R1 5/16” 33,065 3,736 up to 80' (25m) SeaStar 1.7 3.5 HC5805 + HC5806 (9” 2.5”) 100R1 5/16” 66,130 7,472 NOTE: Theoretical torque about pivot point at 35 degrees articulation with 1,000 PSI (70 BAR) system pressure. BORE NOMINAL SHAFT VOLUME OUTPUT TORQUE PART DIAMETER DIAMETER STROKE CUBIC IN. FORCE (SEE NOTE) CYLINDER MODEL NUMBER Inches (mm) Inches (mm) Inches (mm) (cc) Ft.-Lbs. (N) In.-Lb. (Nm) SINGLE 9" STROKE x1 HC5801-2 2.00 (51) 1.00 (25.4) 9 (229) 21.25 (348) 2,946 (13090) 18,900 (2,130) SINGLE 11" STROKE x1 HC5803-2 2.00 (51) 1.00 (25.4) 11 (280) 25.9 (425) 2,946 (13090) 23,140 (2,610) SINGLE 9" STROKE x1 HC5805-2 2.50 (64) 1.00 (25.4) 9 (229) 37.11 (608) 5,154 (22926) 33,065 (3,736) TWIN 9" STROKE x2 HC5802 2.00 (51) 1.00 (25.4) 9 (229) 42.50 (697) 5,892 (26,190) 37,800 (4,260) TWIN 11" STROKE x2 HC5804 2.00 (51) 1.00 (25.4) 11 (280) 51.80 (850) 5,892 (26,190) 46,280 (5,220) TWIN 9" STROKE x2 HC5806 2.50 (64) 1.00 (25.4) 9 (229) 74.33 (1216) 10,308 (45,852) 66,130 (7,472) POWER STEERING CYLINDER SPECIFICATIONS: NOTE: Theoretical torque about pivot point at 35 degrees articulation with 1,000 PSI (70 BAR) system pressure. HYDRAULIC STEERING - Inboard