LiftMaster GH GT- Logic 4 Installation Manual - Page 14

OPERATOR SPECIFICATIONS MECHANICAL DRIVE REDUCTION: Model J, H, and HJ Primary: Heavy duty (5L) V-Belt Secondary: #48 chain/sprocket; Output: #50 chain Model GH Primary: 45:1 for 1/2, 3/4 and 1 HP Worm gear-in-oil bath gear reducer 44:1 for 1-1/2 and 2 HP 42:1 for 3 HP Output: #50 chain OUTPUT SHAFT SPEED: Model J, H and HJ 36 RPM Model GH 38.3 for 1/2, 3/4 and 1 HP 39.2 for 1-1/2 and 2 HP 41.1 for 3 HP DOOR SPEED: Model J, H and HJ 8-9" per second depending on door Model GH 8-9" per second depending on door BRAKE Solenoid actuated disc brake BEARINGS Output Shaft: Shielded Ball Bearing Clutch Shaft: IronCopper sintered and oil impregnated Models H and HJ ONLY HAND CHAIN WHEEL Left or right handing Models H and HJ ONLY HOIST WHEEL Standard mounting on left or right side HOIST AND JACKSHAFT MAXIMUM DOOR AREA (SQ. FT.) MODELS J, H, AND HJ 24 ga. 22 ga. Steel Steel ROLLING Alum. Grilles --- Fiberglass Doors Alum. Doors 24 ga. 22 ga. Steel Alum. Doors SECTIONAL --- --- 1/3 HP 310 285 1/2 HP 400 350 3/4 HP 560 500 1 HP 640 625 --- --- 20 ga. Steel Wood Doors 24 ga. Steel Insul. 260 320 450 560 20 ga. 18 ga. Steel Steel Grilles --- --- --- 210 280 380 475 16 ga. Steel --- --- --- 16 ga. --Steel --- --- 20 ga. Steel Insul. 175 250 325 400 16 ga. Steel Insul. 125 200 250 310 MODEL GH 24 ga. Steel ROLLING Alum. Grilles --- SECTIONAL Fiberglass Doors --- 1/2 HP 325 3/4 HP 480 1 HP 650 1-1/2 HP --- 2 HP --- 3 HP --- 5 HP 22 ga. Steel Alum. Doors 24 ga. 22 ga. Steel Alum. Doors --- 300 430 560 ------- --- --- 20 ga. Steel Wood Doors 24 ga. Steel Insul. 275 390 500 680 ----- 20 ga. 18 ga. Steel Steel Grilles --- --- --- 250 340 430 540 640 875 Call for specifications 16 ga. Steel --- 16 ga. Steel --- 20 ga. Steel Insul. 225 275 325 425 560 840 --- --- --- --- 16 ga. Steel Insul. 175 225 300 375 460 620 Operator specifications/Maximum door area - Hoist and Jackshaft 14