DESIGNED FOR EASY OPERATION AND INSTALLATION HARRINGTON'S® MRQ SERIES DUAL SPEED MOTORIZED TROLLEY PAIRED WITH OUR EQ SERIES THREE-PHASE DUAL SPEED ELECTRIC CHAIN HOISTS ARE THE ANSWER FOR LIFTING AND MOVING MATERIAL IN MEDIUM- AND HEAVY-DUTY INDUSTRIAL APPLICATIONS. BOTH HOIST AND TROLLEY ARE DUAL SPEED VIA VDF SO YOU CAN FINE TUNE SPEED TO MEET YOUR NEEDS. FEATURES UL STYLE""MARGIN-TOP0PX; PADDING-TOP 5PX; PADDING-BOTTOM 5PX;"" PULL-ROTOR MOTOR BRAKE EXTREMELY DURABLE AND RELIABLE THIS ADVANCED DESIGN CONTAINS NO BRAKE COIL TO FAIL LIKE CONVENTIONAL DISC BRAKES EXTERNAL MOTOR FAN FUNCTIONS TO QUICKLY ELIMINATE RESISTOR MOTOR AND BRAKE HEAT. THIS RESULTS IN IMPROVED HOIST DUTY RATING AND GREATLY LENGTHENS BRAKE LIFE. MOTOR IS TOTALLY ENCLOSED FAN COOLED (TEFC) PRECISION MACHINED HELICAL GEARS IMMERSED IN OIL BATH LUBRICATION RESULTS IN QUIET SMOOTH AND COOL OPERATION CHAIN CONTAINER DURABLE PLASTIC CONTAINERS ARE STANDARD CORROSION RESISTANT LOAD CHAIN NICKEL-PLATED GRADE 80 DIN CHAIN FOR SUPERB DURABILITY AND STRENGTH FORGED CARBON STEEL HOOKS UNDER EXCESSIVE LOADS WILL OPEN GRADUALLY AND NOT FRACTURE. BALL BEARINGS PRODUCE SMOOTH ROTATION. BOTTOM HOOK WILL SWIVEL 360°. HEAVY-DUTY HOOK LATCHES ARE STANDARD COMPACT ALUMINUM BODY DIE-CAST BODY IS LIGHTWEIGHT AND OFFERS LOW HEADROOM ONE OF THE BEST IN THE INDUSTRY. PAINT IS ELECTROSTATICALLY APPLIED COMPLETELY SEALED BODY SUITABLE FOR BOTH INDOOR AND OUTDOOR APPLICATIONS INCLUDING HARSH ENVIRONMENTS. (CONSULT OWNER'S MANUAL FOR DETAILS.) GASKETS THROUGHOUT THE HOIST PROVIDE FOR AN IP55 RATING VARIABLE FREQUENCY DRIVE (VFD) DUAL SPEED CONTROLS VIA ""UNDER-THE-COVER"" VARIABLE FREQUENCY DRIVE FOR BOTH SINGLE-PHASE AND THREE-PHASE HOISTS. VFD INCLUDES COUNT HOUR METER LOAD LIMITER AND NO-LOAD HIGH-SPEED FUNCTION LONG LIFE FRICTION CLUTCH PROTECTS HOIST FROM DAMAGE AND PREVENTS OVERWINDING UPPER/LOWER LIMIT SWITCH LOW PROFILE UPPER AND LOWER LIMIT SWITCHES PROVIDE EXCELLENT HEADROOM UNIQUE CHAIN G