... of 100m/nq capacity, suitable for soil testing, SPT testing Mini Crawler Drilling Rig.Suitabble for diamond core drilling, carbide core ... m2. Rod Dia. 42 mm3. Drilling Angle 90° ~ 75°4 Rotary UnitSpindle Speed (4 shift) 71,142,310,620 rpmSpindle Stroke ... : 1500 rpm7. Power Diesel Engine 12.1 kw/2000 rpm mini crawler drilling machine for soil testing, SPT testing