Auger Drive Calculator

Calculate torque and flow for hydraulic auger drive based on diameter and soil conditions

Input Parameters

Results

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Torque Required
ft-lb
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Motor Displacement
cu in/rev
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Flow Required
gpm
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Drill Time
min

Reference

Torque = resistance × diameter² / 12 Resistance: sand 15, clay 30, hardpan 60, rock 100 (lb/in²) Penetration: sand 12, clay 8, hardpan 4, rock 2 in/min 1.3× safety factor for stall torque margin