| 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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