Item | Romack Crane | Normal Crane | Hoisting Motor | —Squirrel cage pole-change motor —Optimized cooling 30% higher —Protection class IP55 —Motor duty 60% ED | —Carbon brush type, more spares —Normal cooling —Protection class IP54 —Motor duty 40% ED | Drum | —Larger diameter —Longer wire rope lifetime —GGG70 iron casting rope guider | —Small diameter —Plastic rope guider | Wire rope | —High duty, stress 2160N/mm2 —Galvanized, maintenance free | —No anti-rust treatment —Stress 1440N/mm2 | Gearing | —Hardern | —Soft tooth surface | Brake | —Disk brake, self-adjusted —Maintenance free | —Shoe type brake, manual adjustment | Travelling motor | —Inverter motor, squirrel cage type —Protection class IP55 —Motor duty 40% ED | —1 speed motor —Protection class IP44 —Motor duty 15 ~ 25%ED | Trolley | —Stepless, stable operation | —1 speed, huge strike | Bridge | —Stepless, stable operation | —1 speed, huge strike | Condition monitoring | —Life counter —Overspeed, overheating, overload monitoring and alert —Brake liner monitoring and alert | —No | General design | —Light weight —Less wheel load —Smallest size —Lowest height | —Larger, heighter, weighter |
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