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The double rotary drive distinguishes with its slim design. The inner continuous flight auger is driven independently from the casing by two separate rotary drives.

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DBA 250 Double rotary drive (DBA Series) - Liebherr

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Rotary drive I (casing) - max. torque	0 - 250 kNm
Rotary drive I (casing) - max. speed	0 - 30 U/min
Rotary drive II (auger) - max. torque	0 - 109 kNm
Rotary drive II (auger) - max. speed	0 - 42 U/min

DBA 250

Attachment recognition

Double rotary drilling